• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Advice/Help - Cap upgrade

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dieselpower

dieselpower

Member
Joined 2004
home.comcast.net/~brett_mayer/
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/counterpoint_files/image028a.jpg

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

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

thanks for any help
Brett
 
SY

SY

Ex-Moderator
Joined 2002
SYclotron.com
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.
 
J

Jim McShane

Member
Joined 2006
dieselpower said:
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
Click to expand...

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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