Fisher 500c rebuild in simplified fashion but very effective.

Posted by Michael Samra (D) on May 28, 2014 at 17:33:35

Top side

Underside
I used all electrolytics in the higher voltage part of the supply but I used very good caps nonetheless.Usually for the doubler I use the Pansonic ED series 820uf caps that McShane sells in his wonderful kits but I went with the 560uf Epcos LL which I believe are the high grade Philips that also top grade..I did this because there was more connection material to solder wires to other caps and to the output trafos.Anyway,this is far and above improved from what the original scheme was being you have about three times the original capacitance in most places and it is laid out much more neatly and it's much more quiet.
I took particular note with the preamp and tuner section where extra decoupling capacitance makes the S/N ratio lower on measurement.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken

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Topic - Fisher 500c rebuild in simplified fashion but very effective. - Michael Samra 17:33:35 05/28/14 (19)

What did you do to the three big cans on top? - reuben 06:08:51 05/29/14 (9)

RE: What did you do to the three big cans on top? - Michael Samra 13:37:09 05/29/14 (8)

RE: What did you do to the three big cans on top? Fisher - PeterI 13:44:44 05/29/14 (7)

RE: What did you do to the three big cans on top? Fisher - Jim McShane 06:32:57 05/30/14 (5)

RE: What did you do to the three big cans on top? Fisher - Michael Samra 17:55:56 05/30/14 (0)

RE: Quick question - Russ57 11:18:20 05/30/14 (2)

He has kits for - Michael Samra 07:10:42 05/31/14 (0)

RE: Quick question - Jim McShane 12:37:21 05/30/14 (0)

HBD! nt - geoff 08:02:28 05/30/14 (0)

RE: What did you do to the three big cans on top? Fisher - Michael Samra 18:21:49 05/29/14 (0)

RE: Fisher 500c rebuild in simplified fashion but very effective. - geezerrocket 22:37:32 05/28/14 (6)

RE: Fisher 500c rebuild in simplified fashion but very effective. - airtime 06:12:46 05/29/14 (5)

RE: Fisher 500c rebuild in simplified fashion but very effective. - geezerrocket 07:03:13 05/29/14 (4)

RE: Fisher 500c rebuild in simplified fashion but very effective. - airtime 07:28:56 05/29/14 (3)

RE: Fisher 500c rebuild in simplified fashion but very effective. - geezerrocket 07:39:42 05/29/14 (2)

Luck me - airtime 07:34:45 05/30/14 (0)

RE: Fisher 500c rebuild in simplified fashion but very effective. - Michael Samra 18:29:15 05/29/14 (0)

RE: Fisher 500c rebuild in simplified fashion but very effective. - Satxhifi 18:43:54 05/28/14 (1)

RE: Fisher 500c rebuild in simplified fashion but very effective. - Michael Samra 19:27:32 05/28/14 (0)

Fisher 500c rebuild in simplified fashion but very effective.

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