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-   -   Yaqin SD-CD3 Tube Buffer - upgrading caps (http://www.diyaudio.com/forums/tubes-valves/183529-yaqin-sd-cd3-tube-buffer-upgrading-caps.html)

Barbieboy 20th February 2011 01:20 AM

Yaqin SD-CD3 Tube Buffer - upgrading caps
 
Hello All,

Just had the lid off and take a fancy at replacing the caps:

4x 0.47u 275v
2x 0.22u 275v

Would like to replace them with ClarityCap ESAs, but they don't seem to make any to the same exact spec. Their 0.22u's are 630v and the 0.47u's are available in 250v and 630v.

Does this matter if they are not an exact match on the voltage ?

Many thanks

http://i159.photobucket.com/albums/t...radeBuffer.jpg

http://i159.photobucket.com/albums/t...Internal-1.jpg

00940 20th February 2011 01:25 AM

The voltage ratings in the amp are for VAC (according to PCB markings, can't read on the caps). The ESA ratings are in VDC.

250VDC ESA won't cut it, but 630VDC ESA will be perfect if they fit in.

Barbieboy 20th February 2011 01:41 AM

Many thanks for pointing this out 00940 ;) Not done this before so a bit of a novice LOL

The light blue caps say:

470nK 275V~X2
PCX2 335M MKII

konga 3rd March 2011 09:11 PM

I recently purchased this tube buffer too. I'm split between getting better tube or putting in better caps first. It's generally a better idea to go UP in voltage values instead of down, though it maybe a challenge getting 630V film caps to fit in the case.

Currently leaning toward the cheaper end of the luxury film caps with Mundorf ZN's. Changing out the .47uF and the .22uF would be about $60USD.

00940 3rd March 2011 10:40 PM

Some brands have 400VDC caps too, they might be a better fit and should still be ok voltage wise. Best get a reading of the voltage at those caps first though. Yaquin might have been pushing their luck.

From the markings, they have used those caps: http://ch.elcomp.ch/download/Pilkor_...-PCX2-335M.pdf They're quite commonly found as line filters in more expensive computer power supplies. As a matter of fact, they sound half decent used as coupling caps.

konga 3rd March 2011 10:54 PM

These guys replace their CD3 caps with super expensive Mundorf's, check it out:

http://www.liveacoustics.com.sg/Mod%...20&%20tips.htm

Barbieboy 3rd March 2011 11:58 PM

These should do it:

ClarityCap capacitors home page

Not expensive and they are 630v, will easily fit being 21x19mm

Barbieboy 4th March 2011 12:03 AM

Quote:

Originally Posted by konga (Post 2490307)
I recently purchased this tube buffer too. I'm split between getting better tube or putting in better caps first. It's generally a better idea to go UP in voltage values instead of down, though it maybe a challenge getting 630V film caps to fit in the case.

Currently leaning toward the cheaper end of the luxury film caps with Mundorf ZN's. Changing out the .47uF and the .22uF would be about $60USD.

I am tempted to go for the ClarityCap SAs as I have heard these and really liked them. More revealing caps really do my hearing in, tried the MRs and my ears are ringing like mad... Guess my hearing is on its way out, but must go what doesn't aggravate my ears

konga 4th March 2011 03:31 PM

Barbieboy do you have a multimeter? Can you measure the heater voltage and current (blue wire).

Barbieboy 8th March 2011 03:31 PM

Quote:

Originally Posted by konga (Post 2491124)
Barbieboy do you have a multimeter? Can you measure the heater voltage and current (blue wire).

Sorry I am away from home at the moment, but will do as soon as I get back.


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