[h=Appendix - Krell-O-Tracker ]%1[/h]
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.
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|-
| class="tcat" | Date Finished or IP
| class="tcat" | Name
| class="tcat" | Transformer
| class="tcat" | Total uF Per Ch.
| class="tcat" | DC Rails
| class="tcat" | Emitter Resistors
| class="tcat" | Output Devices & # Per Ch.
| class="tcat" | 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
|-
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.
|-
| class="tcat" | Date Finished or IP
| class="tcat" | Name
| class="tcat" | Transformer
| class="tcat" | Total uF Per Ch.
| class="tcat" | DC Rails
| class="tcat" | Emitter Resistors
| class="tcat" | Output Devices & # Per Ch.
| class="tcat" | 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
|-
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