Wednesday, July 31, 2013

Krell KSA5 amplifier

A clone of the famous Krell KSA5 headamp.


There are 2 options for the Power Supply, either original or alternative design.

Schematics:

 http://gilmore.chem.northwestern.edu/ksa5.pdf

 Latest silkscreen:
  • Amplifier:
Board dimensions(mm): 254 x 191


  • Original Power Supply:
Board dimensions(mm): 151 x 98


  • Alternative Power Supply:
Board dimensions(mm): 160 x 122

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1 comment:

  1. AnonymousSeptember 4, 2013 at 12:20 AM

    1. Does anyone have (or know where I can find) a BOM for the power supplies?

    2. Is there any benefit to using 2.5" heatsinks, instead of 1.5" or 2"?

    3. I see the BOM calls for 8 heatsinks. It also calls for 6 x MJF15030 and 4 x MJF15031. I would have expected that each of those would need a heatsink, so a total of 10 heat sinks. Or is the number of MJF15030 off? (FWIW, I can't seem to see the pictures of the boards above (just a red "X"), or I would check this myself.

    4. Are any mounting kits and/or isolation pads needed for the heatsinks?

    5. What are the recommended specifications for the power transformer for each variety of PSU board?

    Many thanks in advance!
    Adam

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