Tubelab tse ii

They should all be working, but you The assembly manual, schematics, and theory of operation are all on this web site. To switch to 300ohm for 300B, simply remove 150ohm resistor. By request, the TSE-II board is larger than the original TSE and will not fit in an enclosure built for the TSE. I still have the amp and use it often. My type 26 has NO bottom, for ease of access, but I lined the sides with aly foil for screening. TSE-II Heat Sinks. Joined 2005. Power the amp up, set the output tube bias first, then set the driver tube voltage. Mine has started blowing fuses and I've lost the drawings that were sent to me via email years ago. Go. Questions regarding a TSE-II in 300B configuration: 1) What is the current rating required for the HV tap? Tubelab_com. 6K for a TSE 300b build. I decided to use the “Coke Bottle” shaped 6L6GC’s made by Shuguang for this testing This means a 350 volt cap is OK for 45 amps that run at 275 to 325 volts. It uses a Microchip part while also incorporates a list of requests from this forum, most notable being a larger board to Included in sale: TSE-II board, Capacitors: C2,3,4,5,6,7,8,10,12,13 Supplemental Capacitor: 45uf 440VAC Motor run cap Diodes: D1,4,5,6 ICs: IC 1,2,3 Q1 and 2 which are STF3LN80K5 mosfets The six called out on board heatsinks. I have increased this to 1 MEG for the TSE-II in order to boost the gain a little. 5 VDC on the heater side of R3. Most users use a 3 K ohm transformer with 2A3 tubes. I'm running Gold Lion 300B's. 2019-09-30 9:22 pm #499 2019-09-30 9:22 pm #499 Most 5842's are quite variable in the bias voltage required to get 10 mA of current. Grounding the input does not remove it it. robgobson; 2021-08-14 8:02 pm; Replies 13 Views 3K. I would not use any of those cheap little meters for measuring the bias in the TSE or TSE-II. The engines in the series (10-14 1960's rated HP) have plenty of power for most uses. 5 VOLT FILAMENT TUBES Tubelab. With a normal 6. T1-1 and T1-6 on the board are not connected to anything. TSE schematic is shown here for reference. 25 mA at 150 volts is less than 5 VA so both your transformer windings are plenty big enough. If you want more power Tubelab SSE can be run in 7W S. Operating point as follows : Heater 300 B : 4. Jeg har et spørgsmål om check-out på min TSE II. N. Construction. My amp works fine but his the FET's will not turn on and bias the output tubes. B+ is around 348v, biased at 66ma. Gallery Archive Articles. gorko1. New TSE-II build has higher than expected B+. Since the TSE was my first amp build, I can't really comment on your proposed grafting of a Tubelab front end onto a DHT final. 2019-08-05 3:18 pm #436 2019-08-05 3:18 pm #436 Gavin, Yes, I have at least a year's supply of boards and USD $55 is correct for international shipment. All electrical work was done about 2 years ago but making the case, metal plate work Tubelab. 5 V. 2022-06-07 1:25 pm #1,185 2022-06-07 1:25 pm #1,185 Technical said: When they received equipment in their factory service department for repair. They are "universal" opt's and can be wired for both 3. It is used primarily for constructing a high end DHT amplifier. See pictures. George Anderson’s PCB and build instructions are excellent and the Tubelab forum also provides good help and support. M. Has anyone played with the 5842/417a on their tse? I had originally been running a set of amperex tubes and just a few days ago picked up some WE 417a When you assemble your next board, is it possible that you don't have the fasteners so close to each other as they are now? You are mounting the board The Tubelab SE amp board is used for a "no compromises" amplifier that uses DHT tubes like the 45, 2A3 and 300B. jpg. A 1 meg resistor with a 0. Joined 2021. " You could use the 372HX, but your B+ will end up on the low side. I would now like to offer an already assembled SSE (TSE-II) board. Thread starter TN Allen; Start date 2022-02-20 2:42 pm; Prev. Hej George + tubelab forum. 2021-07-13 4:31 pm #1,106 2021-07-13 4:31 pm #1,106 My rule of thumb (literally) is that if you can hold your hand on the transformer for 10 seconds it's OK. Some more TSE-II wiring questions Like Bryce, I am also in the wiring phase on my TSE-II and had a question on the wiring diagram shared in post 598. 2 ohm resistor in parallel with R3 (2. It is based loosely on a design that appeared in Vacuum 3) Increase resistance to R2 - To facilitate easy change between 100ohm (for 2A3/45) and 300ohm (300B), a 300ohm resistor will be soldered in place, with a 150ohm resistor "piggybacked" in parallel for 100ohms (2A3/45) - on the back of the board, of course. The ground shipping was over $58. Thread starter mkane77g; Start date 2017-11-17 2:07 am; Status This old topic is closed. This yields about 320V B+ when the amp is in "45 mode" (I'm using a choke with 82-ohm DCR). Jun 26, 2023. Joined 2009 One of the recurring themes on the forum seems to be that of heat sinking the TSE-II components. 75$) plus shipping depending on the destination country Otherwise the mod I and mod II boards are the same. Tubelab_com said: The original TSE had anywhere from 100K to 470K resistors installed for R15 and R26. Attempting to Tubelab. The TSE is a two stage design, and will remain so, so the twin triode TV sweep tubes are not an option. 3 volts at 4 amps. I'm finishing a 45 SET amp on a Tubelab TSE-II board and bought a SSE completed amplifier. Search. Everything is well documented on the Tubelab website. Jh4 TSE-2 Build. One is going in a 45 amp with 5K Transcendars from stock. It is unlikely that a 100uF cap that will fit the PC board can be found in the higher voltages. 3 KB · Views: 217 Member. 1; 2; First Prev 2 of 2 Go to page. This weekend i was trying to troubleshot why i have some startup hum in my TSE. But there is a slight buzz, just audible about 10 feet away. It needs to do two of three jobs depending on tube choices. The filament voltage levels off at 2. Tubelab. Many sit around 360 V, 60 mA and provide a few watt with relatively high Tubelab contact info: Phone number: +55 1140823255 Website: www. 2019-10-28 4:31 pm #10 2019-10-28 4:31 pm Now that I have moved and my lab is in a 2000 square foot basement with concrete walls, the 2 WPC TSE just doesn't cut it with any small speakers, so it's sitting idle on a shelf. Hi all, I'm finishing a TSE (it’s more than a year now. Big thanks to George for all his effort in the tubelab SSE. It is one of the two most quiet 300b TUBELAB TSE-II (Top Side) V1 V2 1 4 2 3 1 4 2 3 1 9 8 7 6 5 4 3 2 1 8 7 6 5 4 4 3 2 8 1 7 6 5 R29 R18 L-OPT R-OPT R30 R6 C11 C9 R20 R9 R12 R23 R36 L-Input R-Input 010203 010203 0201 0201 B+ Voltage B- Voltage Left Channel 300B Right Channel 300B 300B Filament Voltage (R) T1-RED_YEL CHOKE So I finished building my TSE ii today and am having multiple issues with the checkout procedure. 25 amp filament. Sep 7, 2021 #2,444 sunilj said: Finished a long pending build - Tubelab TSE-II (2A3). There are a number of operating points commonly used with the 300B. 34 Volts (after reduced R3 to 1. Several different flavors of electrolytics and mosfets have been ordered for testing. I´m very interested in your new TSE-II board, a bargain, i think. And, when it comes to jumpers, only PAD1, PAD3 and PAD4 remain. I hooked it up to my TSE today with both primaries tied together as parallel. Tubelab SE 1. The Sharp regulator used in the original TSE could not go above 7 volts on it's input, so tubes like the 811A and the 50 Tubelab contact info: Phone number: +55 1140823255 Website: www. Tap 4 is connected to T1-7 and T1-8. A center tap on the 6. The 5814/414a preamp tubes and the 300b tubes are supplied with DC filaments. boywonder. Thread starter jh4db536; Start date 2021-02-25 7:35 pm; Status This old topic is closed. 2019-05-11 2:16 pm #206 2019-05-11 2:16 pm #206 Chinese 2A3's from around 1993. Due to many factors, after 18 years in business Tubelab Inc will cease operations at the end of 2023. Finally started my TSE build tonight and thought I would document it and ask questions here. Joined 2014. But I don't see why it wouldn't work well given that George's gain stages are so stable. 2020-04-01 7:15 pm. Agreed about the Tubelab. TSE-II 300B Mono-Block #1 Sorry for the GIF; just wanted to take a look at Terry Garr again. A SE 300b or good 2A3 or EL84 PP amp would match your present speakers better. The new board The SSE (Simple Single Ended) board is used to make a simplified SE amplifier that uses indirectly heated tubes like the 6L6GC, EL34, KT88 and 6550. TSE : Volume pot wiring. 1uF cap should result in a 3dB point of 10 Hz. Thread starter Atk1d; Start date 2021-01-15 10:53 pm; Jump to Latest A. I saw his pictures of some awesome looking DIY speakers on one of the forums. 51 volts, and music plays. . On the 5482 tube i was reading 5. I found some 1984, also. I have my TSE-II board built and running on the bench. This amplifier was made by Chris in Australia. The grid can be connected to ground through a resistor, or other path, and a positive voltage can be applied to the cathode, usually through a resistor in parallel with a bypass capacitor. This TSE II from George is unreal. 35 VDC B+-137 VDC B-5. "You should make things as simple as possible, but no simpler" - Tubelab_com. I designed the TSE-II to use a modern regulator chip and incorporated several user requests at the time of redesign. This is the schematic for the Tubelab SSE amplifier. tubelab. 20190726_212301. Measuring TSE-II Filament currents? diyAudio Community diyAudio Store. If you Jh4 TSE-2 Build. With a tiny amount of tinkering, mostly due to the MONOBLOCKnature of the beast (e. I needed a simple single ended amplifier with excellent sound. TSE-2 and mic29502wt substitute I recently received a tse-2 board from George. Last night, I had it on the bench as I was trying to troubleshoot some hum in my phono I made one about 10 years ago, but decided that the 6DN7 worked better, and the 6GF7 even better still. Thread starter gmonno; Start date 2015-04-18 10:12 pm; Status This old topic is closed. I have recently built a TubeLab SSE and I am in the process now of building a TSE-II, so much fun! I have noticed that the TSE-II has two 10 ohm resistors R18 and R29 used to measure the bias voltage. The new boards are a bit darker in color. Search titles only By: Search Advanced Tubelab_com. This RC coupled amp uses a 717A as a pentode driver with the screen grids regulated to 123V with a string of zeners and 150V on the plate for 3mA My buddy and I have built 2 identical TSE boards. Nothing to do with DIY audio, but lots of opinions. ~6. Best guess is ship out to me on Friday. T. Pictures are in post #7 of that thread. This allows the use of smaller coupling caps in the TSE-II to get the same low frequency corner. 2019-03-21 2:35 am #361 2019-03-21 2:35 am #361 The board pictured throughout this thread is available as stated in post #29. A bit to low so i put a 2. ** NOW SOLD **. OldHector said: Once upon a time a PCB was a way to preserve a design and monetise it, but now with online PCB suppliers it is trivial and astoundingly cheap to replicate PCBs. Parts include: Hello everybody! I started building tubelab se at 45, now I want to decide what I need transformers, I plan to use the amplifier tubes at 45, so I have a question: What a power transformer will be the best choice? Many here use a transformer edcor 131, but there is one problem with the date of the order may take two months before it will make Tubelab_com. Hi Folks, Getting to the final stages of checkout of my first Tubelab build -- a TSE-II. tubelab. 2022-05-25 11:41 Hi, I just finished building a TSE-II amp. 196. If you want to reopen this topic, contact a One more 45 TSE-II finished . I'm still thinking Amperex. TSE-II 300B OPT mA rating. com refers to the TSE, not necessarily the TSE-II. " Joined 2012. I finished TSE-II 300B Monoblock #2, sounds great as expected, so on to the next Tubelab Project; one of the following: (1) TSE-II (Stereo) with 2A3s or 45s. It is absolutely imperative that you be sure that they are oriented correctly before soldering. 41. But I have a problem with the heater circuit for the 5842 tubes. If you decide to try the MIC29503WT chip test it first with NO tubes in the board. Hi. T. Unlike my Lexan TSE, I never swapped out that board. This board is used to tubelab tse-ii 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 m 1 2 3 4 5 6 7 8 9 m 1 2 3 4 1 2 3 4 1 2 1 2 2 1 2 1 1 2 3 1 2 3 1 2 3 1 2 3 1 2 r19 r 2 6 d1 r 2 8 r 2 7 c 1 1 r23 With your power transformer and choke, probably you will get around 370V with ~70-75mA bias for the 300B tubes. The TSE board is GONE FOREVER, but. I am currently using only the GXSE10-5k OPTs and Orange Drop coupling caps with the TSE; Tubelab_com. Tap 3 is connected to T1-2 and T1-3. My B+ is about 390 volts and I have the bias set at 65mA per tube. I rehoused it this weekend into its newly built case and there's a problem, the output tubes are not heating here are my voltages: No tubes installed:-0. But it's got a much lower power dissipation rating, and much higher drain-source resistance. You can pre - form the leads with needle nosed pliers if you like. 2023-03-25 11:15 pm #1,365 2023-03-25 11:15 pm #1,365 I would use a 50K or smaller audio taper pot on the TSE and TSE-II amps. com What does Tubelab do? Dedicated to advancing the state of the art in affordable high end audio. Search titles only By: Search Advanced search The mocked up TSE-II is playing pretty sweet music through my HD650. I may get another batch out Thursday if orders arrive, Component Testing. and vocal presence in favor of TSE 45. Also an excellent choice. Simple Simple SE questions. The TSE is being redesigned to use a different regulator chip. I ship from Germany. Good advice from hobbyamp. Tubelab_com. They are pricier than others, but ship directly from Japan so if I were in Europe, I would consider them over a US based option like Edcor or One Electron Same boat, will upgrade my TSE-I with a home brew TSE-II, all separated. I desoldered C4, and replaced some screw Search. I suggest that you start with Simple Single Ended (SSE) board. 2019-06-13 5:40 pm #334 2019-06-13 5:40 pm #334 I'm trying to make something readable out of the mess that is currently the Eagle schematic that I used to get the board made. On Tubelab. We measured static resistance at D, S & G of FET's, as well as all pins on the 45's and they match within a few ohms. 2021-01-15 10:53 pm Just finished the TSE-II with a 310-0-310 trafo, 7H (60R) choke and Edcor CXSE-25 OPTs. ••• They sent me 6 out of the 10 that I ordered, so if those live through my testing (doubtful since they were the cheapest and smallest parts in the order), or I haven't made up my mind yet, Mouser has plenty of them. 4 KB · Views: 801 In other news, got a pair of TSE-II boards from George today. The 45’s are DC heated and put out about 2W. 5 amps per tube. New TSE-II build has higher than expected B+ . The extra thermal mass can't hurt. All of my 45s (about 20 or so now) work fine at this voltage, but it is technically Tubelab_com. In a thread about power supplies I mentioned my 845SE amp that I built 15 years ago with the second prototype TSE board. Joined 2007. It is possible to configure the transformer jumper for 5 volts in order to use a non CT transformer, then The SSE, TSE, and new TSE-II amps are examples of this, but the SSE often uses pentode tubes wired as triodes. The measuring leads in the case of the TSE operate at B+ potential. (2) Universal Driver P-P monoblocks with 6L6GC/KT66/KT88 (3) Universal Driver P-P with 6AV5s or 6BQ6GAs; mono or screen drive (?) (4) TubeLab SSE with 6AV5/6BQ6GA in Tubelab_com. Turning either R9 or R20 potentiometer has no effect on the plate voltage. TSE : Volume pot wiring . G. That is the only visible difference. If you have 5 meters connect them up to the B+, output tubes (R18 and R29), and the driver tubes (C9 and C11). Price is comparable to the 10M45s and it should survive with the voltage surge on startup being rated for1,000v. 5 watts with a 3 K ohm load and 2. Can I do inverted assembly, i. 2022-01-26 2:32 pm #1 Hi All, I am in the process of changing out my power transformer for my TSE-II, TSE & 45's . Starting TSE ll . International shipping is possible. Sorry if you already know these details, but others may find it useful. Search titles only By: TSE II - problem with heater regulator. In late 2009 people started complaining about blown rectifier tubes, mostly Sovtek's. The TSE board shown in this web site is NO LONGER available. The Raytheon is a 1985 date code. The chassis is made of maple and aluminum, and measures 12" x 12" x 4". 2022-02-19 8:07 pm #1,133 2022-02-19 8:07 pm #1,133 Renton76 said: Hi, I´m planning my TSEII build actually and am wondering, if fusing the plates of the output tubes would make sense. As George states on his website, for TSE 300B "The power transformer needs to provide about 640 or 650 volts center tapped at 150 mA or more, 5 volts at 2 amps, and 6. 2019-09-07 1:40 pm #468 2019-09-07 1:40 pm #468 Here is an early picture of the very first TSE ever made. Jump to Latest M. 2020-02-23 3:10 am #3 2020-02-23 3:10 am #3 I have never seen an R29 failure. Finished up my 300B TSE-II build a few weeks ago. (New Sensor) When it was time to test the TSE-II it was the only power transformer that I had with enough heater current capability to feed 2A3's. I recently finished tube amplifier based on George`s Tubelab TSE design. TSE & Speakers. I have not built one, but see very good reviews and building experiences of Tubelab’s TSE II. Jh4 TSE-2 Build . com, you mention: On my SSE, I had installed an Inrush Current Limiting Thermistor -- is one recommended for tse II as well? Optional parts to add to the bom: Heat Sinks Mounting Kit with Thermalsil III for TO-220 (4880SG) (mouser part number 532-4880SG). 5 volt 1. Tubelab SE C4 - is high end worth it? Thread starter jerkbag; Start date 2022-01-26 2:32 pm; Jump to Latest J. 2023-11-29 8:14 pm. It gets quite hot when running 2A3s, and while I'm sure it's up to the task short term I'll probably install something beefier at some point in the near future. 2021-03-13 5:25 pm #16 2021-03-13 5:25 pm In other news, got a pair of TSE-II boards from George today. 300b might be a better choice? I have one of the later boards, could be TSE II. As for speakers I’m using a pair of Jordan's Eikona (Jordan loudspeaker drive units), which are declared as 6 ohm speakers (Cornu design, self builded) So the question is Here are a couple of pics of my 300B TSE: I think if I had a fancy potted James power transformer I would have built everything on one chassis. just the sockets on the top side of the board (the one where TUBELAB TSE-II is printed), and place all the rest of the parts on the other side? How about Mosfet and other semiconductors? Will I run into issues with polarity and heath-sink position? Thanks Tube Sockets. The 300B have test points in the rear for easy access with the amp closed. I have three built up TSE-II boards in a box that were built some time ago. With either choice all tubes run on DC to eliminate low level line frequency related IMD in the audio output. That means begining with the tube in cutoff (at the most negative setting of the bias on pin 3), you adjust the R23 until you read 0. Also, for those who come after me, tubelab. TSE II Distortion. 2 KB Assembly Manual • Schematic • Parts List • Tubes and Applications • Design • Simulations. Beginner. It is a 20 year old design that used a Sharp regulator chip that went extinct when ROHS made the lead free mandate. TUBELAB TSE-II 300B STEREO AMPLIFIER For sale is a great little 300b amplifier I built in 2021. 2015-07-24 8:03 am. Finished a long pending build - Tubelab TSE-II (2A3). TSE-II high voltage on plate of 5842, cathode pots have no effect. The TSE is being redesigned to use a different regulator chip. It almost became a Tubelab product, the Spud SE. Joined 2011. 2023-01-07 3:51 am. It works well. Before I connect up the scope I just wanted to check: I have only grounded the board at GRD-2, is that correct? Thanks!! Henry ••• The filament regulator IC can provide up to 2. 3 volt winding is used in a full wave bridge configuration for 5 volt tubes. I see that Tubelab does this on the Simple SE, but I don't see it in TSE-II build photos like Any reason why the TSE 2 would not be a good choice for use in this way? Tubelab_com. It is not uncommon for a user to spend $500 to $1000 USD for a complete amplifier, although it is possible to build an amplifier for lower cost. The distortion and damping factor improves with increasing load impedance. 22uF C9 Coupling Cap B+ 250 to 380 Volts 510 ohm R10 G A K 130K 1W R13 20K 3 Watt R14 1K trimpot R9 Plate voltage adjust Power input U1 5 AMP REGULATOR PQ5EV5 5842 F+ OUTPUT TUBE F+ 2. 988. 300b SE which was the best of my tries. 2022-02-03 6:23 am. 77seriesIII. 750. 2022-03-26 2:50 pm #1,155 2022-03-26 2:50 pm #1,155 sunil said: Can someone point me to the latest BOM of TSE-II? i am strongly considering a build with 300b but i want to make sure parts are available. That puts nearly 400 volts on the meter leads. TSE II Distortion . 8 volts with 45's, but now I'm only getting 105 something, so crank the variac up full, 122 volts (its cold outside). 5 watts with a 5 K ohm load. Here are the options: * DS-025 -- 2500: 4, 8, 16, can be custom air gapped up to 70mA. 5K and 5K so I may experiment which I prefer. Thread starter myfi; Start date 2013-03-16 12:56 am; Status This old topic is closed. Here's what's going in it: * Tubelab SE board w/300Bs * Weber 2022798 laydown PT * Electra-Print OPTs (5k:8ohm, 100mA, 15w) * Triad C-14X choke (6 Henries, Tubelab_com. Thread starter csample; Start date 2019-08-25 4:21 am; Status This old topic is closed. Secondary tap 1 and 2 are tied as parallel and connected to T1-4 and T1-5. I rushed to build it using parts removed from two old prototype boards. @Tubelab_com As shown in the pictures above I added a brass standoff under one of the “venting pads” designed for R36, The diode across R30 is not needed on a TSE-II board. I'm planning a TSE 300b build and considering Magnequest OPTs. I completed Personally, if I were going to build a 300B from a proven design, I'd build the Tubelab TSE II: After a 14 year run, the TSE must DIE! This has active loading on the Finished a long pending build - Tubelab TSE-II (2A3). Thread starter cogitech; Start date 2024-01-09 10:46 pm; Prev. justmikey. Tibetan; 2023-10-26 3:45 pm; Hi All, I built my TSE-II last year with 300B tubes. I am using two SE amps: (1) stereo TubeLab TSE-II with # 45 SETs, and (2) a pair of TSE-II 300B monoblocks. 5 VDC that feeds the regulator to make 5 volts. It was added to original TSE boards, but it became D7 on the TSE-II, you can remove the diode on R30, though there's no harm in leaving it there. I went with Hammond 278BX power transformer, 193J choke and 1628SEA output transformers. "You should make things as simple as possible, but no simpler" - Tubelab Dedicated to advancing the state of the art in affordable high end audio. Valves are a GZ34 rectifier in the Tubelab_com. 2024-01-25 7:37 pm #22 2024-01-25 7:37 pm #22 My 6K7VG also states 150 mA. Just Finished TSE-II Hi Everyone, Finally can finished TSE-II. First, your soldering iron should be set at 600 to 650 degrees F. For my Zu speakers, the EML 45 tubes give the most authoritative sound. The positive fan wire goes to the positive end of C1. Jump TSE pot wiring II. The newer Baby Huey uses the STU9HN65M2 or FQFP2N60C parts. Mahi Well-Known Member. 1 pF (more on that later) and a Coss of 11 pF. 2 volts and stayed there. — Customer Builds. Jump to Latest cogitech. Others have used copper foil, but I had the aly! BTW, what is the No motor run in the actually amp ps, only what's on the TSE-II board. jerkbag. 2 KB · Views: 272 Tubelab SE 2. 4) Adjust bias. tubularfluxus; 2022-02-03 6:23 am; Replies 5 Views 735. TSE II new build -Trafo question. 2023-09-28 8:10 pm. 3 volts at 300 mA each, 600 mA total. warms up faster but drops more voltage Yes, the 5U4g got me exactly where I wanted to be with a 4. They have always been reasonable in their shipping charges, but the recent parts order for TSE-II parts was ridiculous. ••• The Tubelab TSE and TSE-II use this method. TSE question. All parts would work in a 300b build, some substitutions may be necessary for a 45 or 2a3 build. One Electron UBT-3: $90 to $100. Despite its small size, @Tubelab_com As I embark on the assembly journey, I realize my boards are Tubelab. This estimate is mostly from memory from tubelab tse-ii 300b stereo amplifier For sale is a great little 300b amplifier I built in 2021. The parts total was about $250. g. If you have a Tubelab SE and it is working OK, The assembly manual for the TSE-II is still being compiled. Tubelab usually will respond to questions on the Tubelab forum here within a day or two. 2019-05-14 3:10 pm #225 2019-05-14 3:10 pm #225 prison sentence if I get caught with a 2-stroke I also have the first stack of TSE-II boards ready for the post office tomorrow morning. 5 volts then slowly climbed to about 2. 2021-03-24 2:17 pm #971 2021-03-24 2:17 pm #971 The new vendor's TSE-II boards arrived Monday (see UPDATE 3-18-21 in post #1). — Output Transformers. A Tubelab SE board in a clear Lexan case. It is based on the TubeLab TSE-II board and has a number of circuit features that make it a The TSE and TSE-II uses DC on the 300B filaments and 5842 heaters. These are just under $100 each. (2) Universal Driver P-P monoblocks with 6L6GC/KT66/KT88 (3) Universal Driver P-P with 6AV5s or 6BQ6GAs; mono or screen drive (?) (4) TubeLab SSE with 6AV5/6BQ6GA in A single resistor from the cathode that is rated for 2 x the watts, is the same as 2 individual plate resistors at 1 x the watts for each resistor. Tubes are TJ fullmusic and EH-Gold. Mr. ElArte. The three best sounding designs are presented on the this page. I completed a TSE-II build with 45s a few weeks back, all went great, checked out perfectly and sounded beautiful on my test bench. 2020-04-03 1:34 pm #2 the negative supply is about 25 mA and the 150 to 175 volts of negative DC voltage is plenty if you replace R6 in the TSE-II with a jumper wire. Hey all. Thread starter 77seriesIII; Start date 2021-04-09 12:13 pm; Jump to Latest 7. TSEII. Nothing exotic on the component side, K40 coupling caps. Price: 70€ (approx. I simply connected them directly up to the OPT as if they WERE a speaker. As we known if the Tubelab SPP pcb if to be used, I sell an average of 60 SSE boards and 60 TSE-II boards a year. Jeg har et problem. I have noticed a measurable high frequency roll off at mid volume settings with a 100K pot due to the miller capacitance of the 5842 tube. All, Last summer I built a TSE-ii with 300b tubes -- it took a little while to get everything sorted (entirely due to my shoddy craftsmanship), but now that it's all together it sounds awesome. George, not my intend to hijack your thread, but to the subject quoted: I've done some designs with board including a small microprocessor A single resistor from the cathode that is rated for 2 x the watts, is the same as 2 individual plate resistors at 1 x the watts for each resistor. I just finished building my TSE-II this week and was looking for parts the last couple of months also. It is the recommended part for the new TSE-II board. Hi All -- hoping for some help in what was supposed to be a simple Power Transformer replacement for my TSE-II. 2 ohm 3 W resistor: R4: 150 ohm 5 W resistor: omit if using optional choke: R5: 270 ohm 2 W resistor: R6: 10 K ohm 5 W resistor: R7: 100 K ohm 2 W resistor: R8: I glanced at the bias setup instructions on www. 3 volt winding is NOT required. Thank you, George! I have Shuguang 300b-z black treasure tubes in it currently. If it is too hot, the board could be burnt or delaminated. Thread starter Tubelab_com. The SSE, TSE, and new TSE-II amps are examples of this, but the SSE often uses pentode tubes wired as triodes. what is the impedance of the stage used to calculate this cap value and the -3db frequency? Is it the grid leak resistor on the output tube? If it is, the 20K ohm lead to a 36Hz knee However, the sound is incredibly lifelike with a HUGE soundstage IF placed correctly. 2022-02-03 2:26 am #11 2022-02-03 2:26 am Tubelab_com. Most modern mosfets are designed for switching applications. More filtering has been added to the filament regulator circuit to handle 2A3’s Unfortunately, I can't complete my Tubelab SSE project for various reasons. 2022-05-12 11:58 am #2 2022-05-12 11:58 am #2 You did not state which TSE you have, but the issue is pretty much the same with both boards. The switch from the basic Electro Harmonix 300b's to the 300b-z Black Member. It was his first tube amp build. TSE-II Heat Sinks . 2 ohm), then i have 6. #1,414. just the sockets on the top side of the board (the one where TUBELAB TSE-II is printed), and place all the rest of the parts on the other side? How about Mosfet and other semiconductors? Will I run into issues with polarity and heath-sink position? Thanks Tubelab_com. The 45 powered amp is one of my favorites, but it doesn't get as loud as my 300B. I will get a set of full instructions for this board and the new TSE-II up on the web site as soon as I get free to make them. I installed the stock heatsink. 2020-07-11 5:30 pm #822 2020-07-11 5:30 pm #822 Would you suggest building the TSE first the way it is supposed to be built, and maybe replace the regulators later if there is a reason for it? Tubelab_com. The Tubelab SSE uses this method. 7 ohm resistor to get the 5842 fils down to 6. An externally hosted image should be here but it was not working when we last tested it. It can eat 800 volts, has a rated Crss of 0. From what I've read, he has had quite a few life changes the past few years and hasn't had time to write the TSE-II assembly manual and parts list. Tim Mocker; 2021-09-25 4:30 pm; Replies 0 Views 1K. Joined Dec 24, 2017 Messages 663 Points 63 Location Bangalore. 7uf in C4 @ 280v. Next you will be installing the tube sockets. Joined 2010. Hello I have one of George's excellent Tublab SE-II boards mostly built up for tubes up components down and a bag of the rest of the on board bits (except some connector blocks) and a bunch of different MOSFETS and such. Chassis was made by Nishant (Beginner_N) Click to expand Just Fabulous!!!! Reply. com What does Tubelab do? Dedicated to advancing the state of the art in affordable high end Various Tubelab populated PCB Board for sale. They were designed a long time ago when the US line voltage was about 115 volts. The 6. Assembly Manual. If you want to reopen this topic, contact a moderator using the "Report Post" button Tubelab TSE-II 45 amplifier built by myself approximately 18 months ago. When the box appeared on my front porch I was surprised to find over a year's supply of SSE boards instead of TSE-II's. Unlike the rest of diyAudio, the Vendor has complete control of what may or may not be posted in this forum. Replies 176 Since this is a TSE / TSE-II thread I assumed the amp was one of those, which tend to operate at or below about 400 volts. 3 volts AC is rectifier and filtered to produce The TSE-II will replace the TSE as soon as full testing is completed and a batch of boards is ordered from the PC board house. Locked; TSE subwoofer output filter. HOWEVER, I also have two pairs of Klipsch RP-600Ms (don't ask) that I have been experimenting with. Measuring TSE-II Filament currents? Thread starter jerkbag; Start date 2022-02-07 4:40 pm; Jump to Latest J. If things don't work out, you don't want to fry an expensive tube. Construction — Customer Builds. i have a couple of 10M45S from my SSE build. I populated them with quality parts, then never completed the builds. mpri. This works, the pentode takes on triode like qualities with the associated triode disadvantages, most notably the inability to pull its plate down near the cathode voltage thus limiting the available power output. The power supply caps see the full B+ voltage. e. Their turnaround time is 20 to 25 working days, so the TSE-II is likely 6 weeks out or so. 2016-12-15 3:07 pm #2 2016-12-15 3:07 pm #2 The older Hammond power transformers only had 2 wires for the primary. It is based on the TubeLab TSE-II board and has a number of A nice 5w S. Designs. 2015-07-15 10:50 pm. Hi All, I've been a big Tubelab lurker for years, and I've thought about jumping into one of the projects. You'd want a 680ohm or even a 750ohm to keep your tubes happy. com. Like dis: One wire from cap to Ground (last connection on the board, shown on my board next to the red/yellow wire. 3 volt winding. you can swap in a 5U4 instead of the 5AR4. 2019-04-17 12:38 am #162 2019-04-17 12:38 am #162 Here is my build so far with and the prototype was about halfway finished when the TSE filament regulators vanished overnight putting the TSE-II project on the top of the priority list. Less connections, and only one big space required. I am also building a TSE-II for 300B's and went with ISO FC-20S output transformers. I´m new in this thread, but i´ve been following your projects in the tubelab webpage. I’m an experienced builder, (hi-fi and guitar amps), based in London, UK. There are a few open issues I will be exploring, On Tubelab website it is mentioned: > The 45 should be biased in the 25 to 30 mA range. If you wish to discuss technical matters outside the bounds of what is permitted by the Vendor, please use the non-commercial areas of diyAudio to do so. Are you going to fit everything to the top plate? Even so, I would suggest having the bottom removable might be a good idea. Tubelab. 2021-04-09 12:13 pm #1 2021-04-09 12:13 pm #1 Hi All, TSEII on the way! many Tubelab_com. From the TubeLab TSE web pages (Page not found | Tubelab "The 2A3 will make about 4 watts with a 2. You are ahead of me at this point, and my board is guaranteed to have at least one mistake. In the process a list of requests from prior builders was collected and is being accommodated. It however was never intended for use with 2A3's as it does not have enough current capability on the 6. I put most of the small parts, caps resistors, semiconductors, etc for 4 boards into my shopping cart. I have been getting parts from Mouser for over 20 years. The negative fan wire goes to ground in the 300B version, or the negative end of C2 in the 45 / 2A3 version. ) using a pair of One electron UBT-2 as output transformers. The parts list is being redone to use common parts that are available from multiple sources. Unlike any other I built which included a 5842 I. Power the amp up and set the driver plate voltages as shown. More Vendors After a 14 year run, the TSE must DIE! The old Sylvania made, RCA branded 5AR4 that was in it still lives in a TSE-II over 15 years later. After all they were rated for 1. But my scope looked like this. The Hammond 276X will work. SSE OPT DC Current Question. I have just started soldering parts on a TSE-II board. Everything went well during first stages of checkout -- but I'm now at the point of biasing the 300b tubes, and I can't get current to flow on the left one. TSE-II 2A3 Planning, Power, etc. Voltage is obviously higher on his because the 45's aren't The Simple 45 began as the starting point for a "Super Tube" amp design. Attachments. It's also the easiest path Tubelab TSE-II 45 amplifier built by myself approximately 18 months ago. 2019-04-09 1:52 pm #14 2019-04-09 1:52 pm #14 do I replace with the same one? Last week my TSE died at startup. 1 Ohm) Voltage at C5 (B+) = 358 VDC Voltage at Anode of 300B = 350 VDC Bias 300B (L/R) : 76 mA / 77 mA Grid Voltage 300B Discussion and support of Tubelab products, prototypes and experiments. Starting TSE ll. Any help at all would be greatly appreciated! So now for the issues:-upon inital powerup, it ran for a few seconds and then there was a flash and smoke. Recently, I nabbed a big DIY 845 SE two chassis amp, and I'm trying to figure out what to do with it. Last night, I slapped some scraps of ash veneer on an old Baltic birch chassis. 3V winding is about half as with 300Bs, so the primary and the core have lees load. It's largely the same thing except some of the photos show a different board layout. Tim Mocker. Thread starter justmikey; Start date 2019-11-02 1:29 pm; Jump to Latest J. The 5842 is becoming scarce. But are they 5842 I've got a TSE-II running NOS 45 output tubes and a TSE-II running Chinese 300B output tubes. I really don't want to have to pull the board and follow traces. Using 6L6GC tubes and it sounds really nice. I can send photos if required. If you have 480v of B+ and a 560ohm cathode resistor, then your tubes are running over 30w, which probably isn't good. Tubelab has lost money for the last three years and so far 2023 is even worse. There have been far more questions about the Tubelab SE. Thread starter . George/Tubelab and I make similar recommendations regarding the operating point of the 300B. I plugged the other F-55788 into the TSE-II and it works. 6V (or 600 mV) across R18. Thread starter robgobson; Start date 2021-07-22 6:35 pm; Jump to Latest R. 95 Volts, Heater 5842 : 6. 4 VAC supplied from the PT to the board, I only have 6. Anyone has run into this issue before or has any The filament voltage moved up to about 1. I don't think Boeing will Unless things change a lot, I can no longer afford to subsidize Tubelab out of my personal finances, so Tubelab Inc will likely cease operations at the end of 2023. I now have two TungSol tubes, and they were not likely made by Raytheon. Just finished my TSE-II 300B. If you're less knowledgeable about DH pentodes, then maybe a Tubelab front --> DHT build would be a more logical first step. T will drive them well - Tubelab TSE-II (45 /300b /2A3). E. It is possible to configure the transformer jumper for 5 volts in order to use a non CT transformer, then Member. (Shown on my board connected to the other side of the red/yellow wire. The parts shortages, the economy, and the highest lost or severely delayed delivery services (mostly the USPS) I have ever seen have combined to make 2022 a serious money The 6. nodiak; 2008-06-22 1:55 am; 7 8 9. Brinkman; 2020-02-01 12:46 am; Tubelab_com. Lucky for me, it fired up on the first try. Running the 45s on the cool side, so In the case of the mosfets in the TSE and TSE-II it has been a never ending parts chase from day one, It will be running somewhere in the 300v or less range at around 10ma in the Tubelab boards. 4 VAC Rectifier Filament Here's what's going in it: * Tubelab SE board w/300Bs * Weber 2022798 laydown PT * Electra-Print OPTs (5k:8ohm, 100mA, 15w) * Triad C-14X choke (6 Henries, 200mA, 150 ohm) * Motor run cap for C5 I've been sizing based on the availability of Hammond chassis/covers at Angela because I have small kids and want to make sure The "original TSE" was the first PC board offered by Tubelab. gorko1; 2020-03-05 9:58 am; Replies 9 Views 3K. The parts shortages, the economy, and the highest lost or severely delayed delivery services (mostly the USPS) I have ever seen have combined to make 2022 a serious money The Tubelab SE amp board is used for a "no compromises" amplifier that uses DHT tubes like the 45, 2A3 and 300B. 2022-05-04 2:25 pm #1,165 2022-05-04 2:25 pm #1,165 The audio path for the TSE and TSE-II are identical, so all setup instructions from the TSE apply to the TSE-II. Just worried about cathode stripping, blah blah blah. George has chosen 0. Anyone have experience with these? I know George recommends primary impedance of 3K-3. The TSE-II is pretty much the SAME as the original TSE, yet DIFFERENT. It also comes in handy for quickly evaluating different transformers. Use the UBT-2 with 45's and the UBT-3 with 2A3's or 300B's. 2019-12-10 7:01 pm #3 2019-12-10 7:01 pm #3 The ordering info page does not yet have the information on the TSE-II board. The new board is called the TSE-II. Joined 2008. Both are derived from the 6. Help Needed with TSE-II Configuration Decisions for a First Time Tube Builder. Chassis was Tubelab. The other wire from the cap to is on the PCB marked Choke. TSE & Speakers . Included in sale: TSE-II board, Capacitors: C2,3,4,5,6,7,8,10,12,13 Supplemental Capacitor: 45uf 440VAC Motor run cap Diodes: D1,4,5,6 ICs: IC 1,2,3 Q1 and 2 which are STF3LN80K5 mosfets The six called out on board heatsinks. The CT is not connected in this configuration, and therefore not needed. That would take a lot of current through a 300B to blow it. All of my 45s (about 20 or so now) work fine at this voltage, but it is technically I have just started soldering parts on a TSE-II board. The new board will be slightly bigger to handle 300B tubes, and provide more space around the heat sinks. #43. Thread starter Tim Mocker; Start date 2021-09-25 4:30 pm; Jump to Latest T. The Yamamoto A-08S is a very popular 45 amp and I can confirm it is very good sounding within the power range. 2 diodes shorted. These have been my low cost transformer of choice since they replaced the old 125 series. * FS-030 -- 3000: 4, 8, 16, can be Discussion and support of Tubelab products, prototypes and experiments. tubularfluxus; 2021-10-02 11:01 pm; Replies 1 Views 2K. If you have a sixth meter, connect it to the negative bias voltage (R7) as shown below. The 5AR4 usually warms up a bit faster than the typical audio output tube so the power supply caps can see well over 450 volts during warm up. T /15W Ultra-Linear. With 80v AC using a variac, the plate / pin 1 of both 5842 tubes read exactly the same high voltage of 260v. 2020-10-22 1:51 am #12 2020-10-22 1:51 am A couple months ago I ordered some TI regulator chips to test in the TSE-II board but have not yet tried them. The electrical connections in the new TSE-II are the same, but the pads are no longer present since virtually nobody except me used them. This is the Tubelab SE board being used as the driver circuit for the 845SE a 40 watt per channel SE monster amp. I don't understand the reason to bring the negative speaker output terminals to the star ground. Specs: 15 W, 100 mA, 5 kΩ primary, 4 and 8 Ω secondary taps, copper for use with 300B. I use 28 to 30 mA on 280 volts, and 26 or 27mA if operated at 320 volts. I bought a pair of these on Ebay for testing. TSE FET / Driver Stage. The parts list has been modified to reflect the changes outlined below. 2018-12-21 12:05 am #21 2018-12-21 12:05 am #21 You can connect your aux cap directly across C5. I soldered in R1-R7. So: T1 RED 1 & 3 - HV 280v taps T1 RED YEL 2 - HV centre tap (0) T1 YEL 1 - 5v 1 tap T1 YEL Tubelab_com. It is still not clear how this happened, or who's fault it was, but the board house is making me some TSE-II's. - Maybe I just order a TSE II and rebuild everything re-using my transformers and tubes, this time with better ventilation (By the way, F-4V / F-6V The 6. The Simple 45 started out as a basic two stage single ended 45 amp. TSE & 45's. Tubelab Website Reboot; Email questions about PC boards; I bought the TSE-II board because Tubelab said I could get information from this forum. I set the KT88's up to Tubelab SE Amplifier Board 5842 V2 121K ½ W R15 INPUT. . #10. The OTs are Electraprint 5K primaries. All optional features are shown. I have about 50 hours on it and it simply sounds fantastic. Same parts, PT, choke, etc. 2023-11-05 10:08 pm. The driver circuitry is sub-optimal (6sn7 to the grid of a 5687 to a parallel 6sn7 driving the 845). ••• I need some help understanding the coupling capacitor in the 300b TSE circuit. Atk1d. Search titles only By: Type 50 in TubeLab TSE-II. 1 uF coupling cap. The user response has been great, and the most common complaint was regarding not enough overall gain especially with 300B tubes. TUBELAB TSE-II (Top Side) V2 V1 Rectifier 1 4 2 3 1 4 2 3 1 9 8 7 6 5 4 3 2 1 8 7 6 5 4 2 4 3 2 1 8 7 6 5 R18 R29 R-OPT L-OPT R30 C9 C11 R6 R9 R20 R12 R23 R36 R-Input L-Input 030201 030201 0102 0102 B+ Voltage B- Voltage Right Channel 300B Left Channel 300B 300B Filament Voltage (R) T1-RED_YEL CHOKE I finished TSE-II 300B Monoblock #2, sounds great as expected, so on to the next Tubelab Project; one of the following: (1) TSE-II (Stereo) with 2A3s or 45s. £120 for the lot plus shipping - UK and maybe further afield, it would depend. The Tubelab SSE board is used to make a The 300 Beast is a 300B push pull amp that I designed and built several years ago. TSEII . 2 vdc, plus twinning the MOSFET “grid” resistor to ~36K, really 39K), everything biased-up nicely, first time. I already had to fix a couple mistakes. 192. 5 or 5 volts-150 V JUMPERS: 45, 2A3 AND OTHER 2. I immediately turned the power off and found a burned mark between d2 and d3 on the The TSE is being redesigned to use a different regulator chip. Member. 2019-10-28 1:12 am #22 The TSE is being redesigned to use a different regulator chip. I should Just thought i'd post the Tubelab SSP schematic along with notes i've come across. I have already called it the UNSET, since it The original TSE became the TSE-II because the Sharp regulator went extinct and no drop in replacement exists. My variac was still set at the same place where I got 107. Search titles only By: TSE-II 300B Checkout Help. I'll see if I can get that set up in the coming week or two. I still have the 6GF7 version. It is based on the TubeLab TSE-II board and has a number of circuit features that make it a fine example of what SET technology can be. As I stated in post #12, the amp saw little use in my small room in Florida because it pumped over 500 watts worth of heat I've attached a picture of the 2A3 TSE-II I built last year. TSE-II 300b_s. 4 KB · Views: 342 View (Top)_s. ••• Several hundred TSE's and TSE-II's have been built in 20 years. The design has matured into a sweet sounding 2 watt SE amp. There have been a few delays that are beyond my control right now which will likely persist until early The type 50 has a 7. 2021-07-22 6:35 pm #1 2021-07-22 6:35 pm Beginner here, working on putting together a TSE-II 300B with a target operating point of 385v B+ @ 2023-07-23 2:41 pm. Can the TSE handle series speaker wiring? Thanks. Tubelab SE C4 - is high end worth it? . Chassis was made by Nishant (Beginner_N) :) IMPORTANT: The TSE is fixed bias and requires adjusting the 300B and 5842 bias with a multimeter. The idea is to avoid any physical stress on the part. Does anyone who built the Tubelab 300B still have a copy of the schematic and layout drawings? Preferably the older version. robgobson. 2021-10-09 2:01 pm. Tubelab SPP. The getter has no similar to Tubelab's mystery tube, but that didn't show up well in the pics. 2020-06-17 1:02 pm #311 2020-06-17 1:02 pm #311 The original TSE board is no longer being made, and was replaced by the TSE-II, primarily because the filament regulator has gone extinct and the remaining stock got grabbed up by hoarders. The mode (Triode / UL) switch, the Cathode feedback switch, the standby switch, and the rectifier switch are optional, and should be hard wired into the desired position if they are Hi guys, Looking for help confirming PT connections for a TSE board running 45 tubes, i got an ISO Tango power tranny that is less obvious with its heater connections, centre taps and v ratings, the tranny in the same as the one in the attached picture. Thread starter mpri; Start date 2022-05-25 11:41 pm; Jump to Latest M. This gives a 10 Hz corner frequency with a 0. The TSE-II use 1 meg resistors on the gates of the mosfets VS the 470K resistors used in the original TSE. Theme - Light; YYYY-MM-DD / 12-hour clock; The maximum dissipation for EL34 tubes is 25w. Joined 2020. Joined 2011 The older Tubelab docs show the 2SK2700, which is obsolete. ** NOW SOLD ** Valves are a GZ34 rectifier in the power supply with a pair of 5842/417A input valves driving a pair of 45 output valves. Transcendar "output transformer for 300B amplifiers": About $50 each on Ebay. 6 VDC on the capacitor side of R3 and 5. #1. Sounds great! I did have to do a few simple things to manage heat from R36 and IC3. One problem I found was that although the 2 100uF caps looked perfect on the outside, I finished stuffing my tse II board this morning (except for d7). Search titles only By: Search Tubelab. Really hot to touch those Q1, Q2, IC1 Hammond 125CSE: $28 to $30 depending on where you get it. I do have plenty of the new boards. Also, the load on the 6. Back to the TSE-II, yeah, I would buy one Tubelab. This morning, I read opinions about the 737 Max airplane. com but could not (conveniently) spot the recommended current for 300b, however 60 Ma will be safe. I had been using Sovtek tubes without issue in other amps, but mine were 3+ years old, so I got some new ones, and sure enough one popped on first power up. The power transformer needs to provide about 640 or 650 volts center tapped at 150 mA or more, 5 volts at 2 amps, and 6. Unless things change a lot, I can no longer afford to subsidize Tubelab out of my personal finances, so Tubelab Inc will likely cease operations at the end of 2023. They can be swapped in about 5 minutes with only a screwdriver. I haven't figured out all the details yet but I will still be on these forums. To use a leaded capacitor in the C4 or C5 position simply insert the leads through the holes, push the cap down toward the board leaving at least 1/4 of an inch between the cap and the board. I asked for a rush on at least some of them. I built this test amp for quickly testing freshly assembled boards. Joined 2009. I doubt that any of these little meters were intended to work under this condition and are likely to die a quick and possibly Hi All, Apologies for the long post, but I was wondering anyone's thoughts: I have a TSE-II with 300b tubes that I recently completed (or so I thought). 5 K ohm load, 3. For 300B and 5V filaments, you install a jumper between PAD3 and PAD4. 2021-10-26 12:58 pm #8 2021-10-26 12:58 pm #8 The XPWR131 was indeed designed just for the TSE. In part because I read his website, tried his suggested operating point, and really liked it. 2021-09-25 4:30 pm #1 2021-09-25 Has anyone measured TSE II Short answer: No. ••• I've been searching online to find equivalent mosfets, and I'm coming up with stuff that is severely lacking in many of the specs I've found for the 2SK2700. Both 5842s are ~175V on the plates, B+ is ~410V Hi - I finished my TSE and it sounds GREAT. 22u value. The driver tubes (5842 / WE417A) need 6. The result is that you get about 265-0-265 from that winding. Some have added larger off-board sinks, there's talk of fans, of soldering or not soldering Here is the checkout procedure from the Tubelab website: I am in the process of hooking up a new TSE-II board for initial power up. Det er ok indtil jeg sætter udgangsrørene ind og prøver at åbne op for bias til 25 mA. If it is too cold, the soldering time will be too long, and the solder may not be evenly melted. 25 v. I run Electra-Print transformers in my Damn Good 300B amp. The board is larger to reduce overcrowding with 300B's and fat 2A3's. TSE II new build -Trafo question . Thanks for the reply. The TSE became the TSE-II back in 2019 after the Sharp filament regulator chip went extinct. To insert a component gently bend its leads at right angles to the body of the part. Discussion and support of Tubelab products, prototypes and experiments. In trying to match up specs on Mouser's website, In my quest to understand the TSE, I’d like to continue with a discussion of the FET / Driver Stage. So far so good; now WOM (waiting on Mouser). I think it looks very nice for number 1 and I can only imagine what he will build in the future. 2 watts each! A 32 ohm can on an 8 ohm winding will present a 20K ohm load to the tube. They are larger than the original TSE board and have a gold finish, Tubelab_com. The SPP usually sells 15 or 16 boards a year except for 25 boards in 2015 and 2018 bringing the average up to 18. One suggestion was the STP3NK90ZFP. I have two TubeLab TSE-II board presenting the same exact issue when installed. TSE-II 300B OPT mA rating . If you want to reopen this topic Also, the load on the 6. So, how do you connect up headphones to the TSE-II or any other tube amp? I did something crazy with the big Philips headspeakers. It has about 40 hours of use on the bench, and maybe 10 since being finished up in its case, with no issues. Getting Started; Resistors; Tube Sockets; Connectors; 2. A 400 volt cap should be used if your B+ is from 325 to 360 volts, and a 450 volt cap is needed for boards that run from 360 to 400 volts. If you want to reopen this topic, contact a moderator using the "Report Post" button. The heater / filament supply in the TSE and TSE-II is a bit unusual. TSE FET / Driver Stage . 4 diodes are used to make about 6. ih qk dr yq gt ui eo kt uj jo