This is to keep track of variations on this project, and give others guidance on what was used. If you have one in-progress, feel free to enter the info on the parts you are using or plan on using. Feel free to enter notes, links, pics, comments and such in the last col.
| Date Finished or IP | Name | Transformer | Total uF Per Ch. | DC Rails | Emitter Resistors | Output Devices & # Per Ch. | Notes, Links, Pics, Comments |
| 1981-87 | Original | 400VA x 2 | 80,000 uF | 37.5 VDC | 0.5 Ohms | MJ15003/4 (2 each) TO-3 | 50 WPC Class A |
| 1. | Mark G.#1 | 680VA X 2 | 112,000 uf | 39.0 VDC | 0.68 ohms | MJL 21193/4 (3 each)TO- 247 | 54 WPC Class A - Amp has been scrapped out to build permanent version. |
| 2. | Assesears | 500VA x 2 | 90,000uf | 33.0VDC | 0.68ohms | MJL4281A/4302A(3 each)TO-247 | 36WPC ClassA? (small heatsink) |
| 3. | Stuart Easson | 2.8kVA x 2 | 2x25000 | 105VDC | 0.68ohms | MJ21193/4(16 each)TO3 | 50W/Class A ; 500W/Class B |
| 4. | Stuart Easson | 450VA x 2 | CLC 68k/2.7m/68k | 37v DC | 0.68ohms | MJ15003/4(2 each)TO3 | 50W/Class A , 75wClass B |
| 5. July 31, 2005 | still4given | 500vA X 1 | CRCRC 45,000 | 42 VDC | 0.68 ohms | MJ15003/4 (3 each) TO-3 | (don't know) [Pictures] |
| 6. August 8, 2005 | LGreen | 700VA x 2 | 128,000 uF | 37 VDC | 0.499 ohms | MJ21193/4 (4 each) TO-3 | Notes- low/high bias option switches from 20 WPC Class A to 50 , WPC Class A at 8 ohms, fan cooled; 70 lbs/ 32Kg. Discussion and Pics- (a) [Post #3609] (b) [Personal Web Page] |
| 7. in progress | Mark G. #2 | --- | 112000 mfd | --- | 0.68 ohms | MJL 21193/4 (3 each) | Proto test of WIKI boards |
| 8. | NUTTTR | 800VAx3 | 272,000uf/ch | 38v DC | 0.68ohm | MJ21193/4 (5 pairs/ch) | Not yet... |
| 9. March 2006 | JoeyDD? | 500VA x 2 | 80000uF/ch | 36VDC | 0.68ohm | MJL21193/4 (3 pairs/ch) | 2 monoblocks, passive cooling, [Pictures] |
| 10. | jacco vermeulen | 300VAx8 | CLC,78000uFx6,2.5mHx2 aircoils/ch | 35VDC | 0.68Ohms | 2SA1216/2SC2922(12/ch) | 4 discrete voltage regulators for main and driver board with 9VAC/27VA step-up toroidals/ch,80x80mm Papst fansx6/ch,7 amps bias? |
| 11. November 26, 2005 | LuckyLyndy | 500VA X 2 | 112,000 Per Chan. | +/- 40 F. | 0.68 | 6 Ea MJL21193/4 Chan. | DC Variable Speed 15 vdc Fans Running at 6.5 V. |
| 12. November 28, 2005 | Luke | 25V@7.5A | CRC 96,000uF | 36 VDC | 0.4 ohms | MJL4281, MJL4302 (3 each) TO-3 | (don't know) |
| 13. A week or so left | KMJ | 2x540VA | 132k uF / Ch | 38VDC | F. Re | MJ15003/4 (3 each) TO-3 | Fancontrolled cooling and monitoring done |
| 14. February 27,2006 | Mark A. Gulbrandsen | 2 kva dual secondaries | 56,000 per rail | +/- 38 volts | ? | MJ21193/94 3 each TO-3 | Dual fans at half speed. Final version for me |
| 15. In-Progress | Googler | 2KVA Bel Canto Dual Pri/Sec | searching | +/- 40VDC | ? | 6 x MJL21193/4 per ch | Heatsinks are 12Lx5Wx5H w/ 14 ribbed fins. Boards Stuffed!! Need PSU CAPS |
| 16. In progress | niles | 2x500VA | 56,000 per rail | ~41V DC | 0.68R | 3 Ea MJ21195/6 per Ch.. | Building matched pair as bridged monoblocks using authentic Pass A2 sinks with custom machined chassis fittings |
| 17. Collecting parts | bikehorn | 1x 1250 VA xformer with 2x 39-0-39 sec'ys | ESP capacitance multiplier | 39 VDC | 0.5 ohm | MJL21193/4 TO-3P, 5 pairs/ch | will include VU meters |
| 18. June 27, 2006 | zlast | 2KVA 28X2 | 120000 uf | Rail +/-40 V | 0.47 ohm | 3 pair MJL21193/94 per ch | 4 channels/ redesigned boards so outputs transistor on board /50WPC Class A. [Pics/ Post #6747] |
| 19. July 3, 2006 | Farl | 1X500 VA | 66,000 uf per rail | +/-41V | 0.68R | 3 pairs MJL21193/94 | Maybe 50W Class A [Pics/ Post# 6774] |
| 20. in progress | Andrew T. | 30+30Vac | 750VA | 60mF per rail | +- 42Vdc Re=0r333 | 6pr 2sa1943/c5200 passive cooling 3off 8"*8"*2" sinks/ch | 100W ClassA? into 6r, Iq=3A, twin drivers 2sb649/d669, +- 42Vreg frontend |
| 21. In progress | Harry3 | Two 500VA 25+25Vac | 56000uF per rail plus 1000uF & 0.1uF caps next to O/P transistors | +- 35Vdc | 0R5 | 6pr 2SA1943/2SC5200 | 2x80VA trans. for front end-will regulate. Two Semikron heatsinks 300x200mm - 80mm fins plus 2 fans |
| 22. In Progress | Harry3 | Two 500VA? 30+30Vac | 60000uf per rail plus 1000uF & 0.1uF caps next to O/P transistors | +- 42Vdc | 0R68 | 6pr 2SA1943/2SC5200 | Two 12Volt fans running at 7 Volts, very low noise. |
| 23. In Progress | XaQ? | 1.6KVA | 28x2 68000 uf/rail | +/-40 V | 0.68R | 3 pair mjl21193/4 | 2 stereo amps 4 passive heatsinks 15.5"L 5.5"W 6"H 46 fins ea. |
| 24. September 17. 2007 | Steenoe | 2 pcs 500VA 26x2 | 90.000uF per ch | E. 35V | 0,68r 6W | MJW1302A/MJW3281A 3 pairs per channel | Passive cooling, weight 42 Kg |
| 25. Jan 01 2008 / IP | B. Jack Richards | C. 2 X 500VA | D. 44000uF/chan/rail | E. 38 V | F. Re=0.5 | G. # 4xMJ21194 | H. Bought fake trans from ebay (HonestCard?) ended up buying from OnSemi?. Now sounds fantastic |
| 26. February, 2008 | john65b | 1240VA | 2 x 56,000uf/rail uF | 37 VDC | Re R68 biased @ .65mv | 3pr 2SA1943/2SC5200 | Sounds EXCELLENT. Bests my UCD400 by quite a bit |
| 27. December 22. 2008 | neychi | 2 x 400VA | 2 x 47000uF per ch | 38 VDC | Re 0.5R | 3 pairs MJL21193/21194 | Passive cooling, 55W class A |