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Old 18th June 2007, 02:54 PM   #1
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Default Advice/Help - Cap upgrade

Hey guys, I bought a Counterpoint SA7 preamp a few months back, and would like to upgrade/replace the caps throughout as they are 20+ years old. Where do I start? all caps at once or a few at a time.

I would like to keep prices below $150, but am having difficulty finding the higher voltage caps for the tube section (100uf/350v & 47uf/450v) other that some very high priced Blackgates.

Also recommendations for the PSU caps, and phono/line stage caps - which are currently Relcaps.


PSU (is the large cap 47uf/450v part of PSU or tube section???)
http://home.comcast.net/~brett_mayer.../image028a.jpg

Tube caps
http://home.comcast.net/~brett_mayer...s/image026.jpg

RelCaps
http://home.comcast.net/~brett_mayer.../image022a.JPG

thanks for any help
Brett
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Old 18th June 2007, 04:27 PM   #2
SY is offline SY  United States
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105 degree rated Chemicons at the required voltage and capacitance are available from Digikey or Mouser. They're pretty inexpensive and work very well.

For coupling caps, you'll hit the law of diminishing returns once you use some decently constructed polypropylenes. Your old caps may still be just fine, probably are, but if any have gone leaky or drifted off value, Wima FKPs are as good as anything else out there, except for their lack of fashion and prestige value and their reasonable pricing.
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Old 18th June 2007, 05:03 PM   #3
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Default Re: Advice/Help - Cap upgrade

Quote:
Originally posted by dieselpower
Hey guys, I bought a Counterpoint SA7 preamp a few months back, and would like to upgrade/replace the caps throughout as they are 20+ years old. Where do I start? all caps at once or a few at a time.

I would like to keep prices below $150, but am having difficulty finding the higher voltage caps for the tube section (100uf/350v & 47uf/450v) other that some very high priced Blackgates.

Also recommendations for the PSU caps, and phono/line stage caps - which are currently Relcaps.

(SNIP)

thanks for any help
Brett
Brett,

I tried to send you an email and found I couldn't, but if you want you can contact me and I'll help you out.
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Old 18th June 2007, 06:13 PM   #4
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Jim
thanks for your assistance! I tried to email you also & found that it is disabled. you can email me at brett.mayer00 (at) gmail.com

thanks
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Old 18th June 2007, 10:53 PM   #5
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I replaced all of the coupling caps in my HH Scott with Orange Drop(polypro) capacitors a few years back and noticed a marked improvment. Available on Antique Audio Supply- http://www.tubesandmore.com/. Pretty decent price for the quality
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Old 18th June 2007, 11:44 PM   #6
mach1 is offline mach1  Australia
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Quote:
I would like to keep prices below $150, but am having difficulty finding the higher voltage caps for the tube section (100uf/350v & 47uf/450v) other that some very high priced Blackgates.
Panasonic TSHA and TSHB are both excellent.
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Old 19th June 2007, 01:23 AM   #7
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Quote:
Originally posted by dieselpower
Jim
thanks for your assistance! I tried to email you also & found that it is disabled. you can email me at brett.mayer00 (at) gmail.com

thanks
You have mail!
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