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Old 14th October 2010, 05:57 PM   #1031
AndrewT is offline AndrewT  Scotland
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start measuring your drivers and outputs.
That will keep you going till the 100's of BCs arrive. Then measure them until all the other components arrive.

Always start assembly with the lowest profile items. Zeners & signal diodes, then low wattage resistors, moving through the height range but leaving the outputs till very last.
Only solder the outputs after they have been screwed to the heatsink.
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Old 14th October 2010, 06:37 PM   #1032
Sheldon is offline Sheldon  United States
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Quote:
Originally Posted by AndrewT View Post
start measuring your drivers and outputs.
That will keep you going till the 100's of BCs arrive. Then measure them until all the other components arrive.

Always start assembly with the lowest profile items. Zeners & signal diodes, then low wattage resistors, moving through the height range but leaving the outputs till very last.
Only solder the outputs after they have been screwed to the heatsink.
Good suggestions from Andrew. I don't think you need 100's of BC's, but they are cheap. If you order them in cut tape formate, you will find most of them to be quiet close. To match the outputs, I would put them in the board - no solder yet - and mount them to the heat sink. Then find some wire the right size to wedge the pins tight to the board, so that they will have good contact. Short one of the diodes with a clip lead and measure them in the circuit. Make sure you have them mounted well to the heat sink, as small differences in heat transfer will give you large differences in current. If you have a device that runs a little lower in current, compared to it's closest mates, use that one in the center position, as it will run slightly hotter.

Sheldon
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Old 19th October 2010, 10:50 AM   #1033
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Hi
I would like to build this amp and was wondering if anyone has three spare amp pcb's I could purchase?

Regards

plc46mon
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Old 15th December 2010, 04:39 AM   #1034
DRZ1 is offline DRZ1  Canada
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Hi guys, last week a made a test on my second (not finished) FC100 amp.

I swapped the thermaltrack Motorola Transistors with Toschiba 2SC5200-2SA1943, and i liked it, warmer sound and a little more detailed.

I have to change the temp comp by something else to finish it. For the test i simply replaced the thermaltrack diode by BD139 BE jonctions, 4 was to much voltage an 3 it's under-compensated.

So i'm open to good solutions to make this mod to a already fantastic amp.
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Old 15th December 2010, 11:14 AM   #1035
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Have you tried with similar Toshiba TTC\TTA series?
Would you share with your amp files?
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Last edited by AndriyOL; 15th December 2010 at 11:31 AM.
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Old 15th December 2010, 01:36 PM   #1036
DRZ1 is offline DRZ1  Canada
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I just try it with 2sc-2sa serie. I don't know about TTC\TTA series, but the infamous Luxman high end serie are using 2SC-2SA transistors.

AndriyOL if you speak about PCB and schematic files, sure i can share it anytime.
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Old 15th December 2010, 06:15 PM   #1037
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Which Motorola thermaltracks have you tried?
TTC\TTA are far better of Cob than 2sc\2sa. You may not see them in hi-end technique, as they are quite new of Toshiba.
Would be nice to see those files!
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Old 6th April 2011, 05:26 PM   #1038
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I am interested in building this amp at some point. Does anyone know where i can get PCB's for it? Many thanks
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Old 6th April 2011, 06:07 PM   #1039
lpm76 is offline lpm76  Denmark
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Originally Posted by bluegrass View Post
I am interested in building this amp at some point. Does anyone know where i can get PCB's for it? Many thanks
Yeah me too! Sounds like an exciting amp.
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Old 9th April 2011, 12:27 AM   #1040
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Hi,

Sorry for OT.

I too am trying to get the PCB's for this project but availability seems low.
If one were to get the PCB's fabricated, from OurPCB, what files would I need to provide them?

In post #42, Mihai has provided some files but what software do I need to open them?

Any help is much appreciated.

Take Care,
Dinesh
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