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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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Vintage Asylum Classic gear from yesteryear; vintage audio standing the test of time. |
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In Reply to: HH Scott 240 power supply (w schem.) posted by The_Gief on April 22, 2015 at 07:43:31:
The first cap is C1. I have four of these amps and I have a pair of its big brother,the 280.C1 is 20uf@600v..I put a 40uf at 600v film cap in there and I also put in a 1.5hy choke in place of the 33 ohm resistors.C3 is not really connected to the rect.A 10k resistor separates it from rectifier and it's actually another charging cap for the 420v source and the 400v source.
This amp is one that can greatly benefit from a film cap power supply.It doesn't need a ton of filtering because of the super high voltage but downstream for the reservoir caps for the 420v and 400v sources, I used a dual 100@500v JJ. Right off the 10k,R43,I put in a 35uf at 500v film cap.
Looking at R47 and R48; assuming a 66ohm/10w resistor was available in 1959, what would be the benefit of splitting it in half and using two 33's in series? I ask because it seems intentional...the same was done with R44 and R45. Maybe to help dissipate heat more efficiently?
I would say that's true..Scott did this on their integrated amps as well.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
Edits: 04/22/15
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Follow Ups
- RE: HH Scott 240 power supply (w schem.) - Michael Samra 13:09:01 04/22/15 (2)
- RE: HH Scott 240 power supply (w schem.) - The_Gief 02:50:16 01/04/16 (0)
- Michael Samra is right... - Lee of Omaha 15:10:51 05/06/15 (0)
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