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-   -   Identifying this capacitor in my Cayin TA-30 amp (http://www.diyaudio.com/forums/tubes-valves/208459-identifying-capacitor-my-cayin-ta-30-amp.html)

tjacobson 9th March 2012 04:55 PM

Identifying this capacitor in my Cayin TA-30 amp
 
2 Attachment(s)
Upgrading to "better" caps in my TA-30 tube amp. Want to confirm this one before start. "220nk 400vac". Is this 22uF/400V? Also, the two smaller caps that say "Cayin" on them have NO description at all. Each one is connected to the AU7/AX7 preamp tubes. Any suggestions? See pictures. Thanks.

overtheairbroadcast 9th March 2012 05:51 PM

nano and kilo? 1X10^-9 and 1X10^3? 220nk? My math says, 220 micro... But this being a Chinese amp, Chinese math, and having seen schematics and the such being questionable, might be best to find someone with a capacitance meter to make sure.

firechief 9th March 2012 06:03 PM

Third digit being the multiplier means that its 22 ufd, also makes sence because its a tube amp, high voltage and all. Also I believe these are house branded caps and the amp is made by a German company.

kevinkr 9th March 2012 06:08 PM

220nK means 220nF 10% so these are 0.22uF 10% film caps and I would recommend at least a 400V cap here. These may be reasonably good film caps so expect to spend a significant amount of cash to get something better. These are the coupling capacitors to the output tubes.

You need the schematic.. One area I can see where an immediate improvement might be made is to replace the 33K and 39K phase splitting resistors with something other than metal oxide.

tjacobson 9th March 2012 06:09 PM

Thanks, sort of what I expected. I will get the capacitance meter anyway just to make sure. My first post on here, but surely not my last... I love my amp btw :)

Rundmaus 9th March 2012 06:14 PM

Quote:

Originally Posted by tjacobson (Post 2939666)
I love my amp btw :)

Why throw away good-sounding and probably non-faulty film caps then for some extra snake oil? ;)

Greetings,
Andreas

tjacobson 9th March 2012 06:33 PM

Ugh, well. Yes, great point. But isn't that what we all do? Here's what I'm working with...

Cayin TA-30 EL34 PP amp (35 wpc) SED winged C, JJ preamp tubes
AMC DAC 8 16 bit non-oversampling (tube modified output) DAC 8
AMC CD 8 transport
Vandersteen 2CE Signature loudspeakers
Silver helix on teflon tube (VH Audio recipe) interconnects (hand made by me)
VH Audio power cords (another easy DIY attempt by me)

firechief 9th March 2012 09:01 PM

Quote:

Originally Posted by kevinkr (Post 2939664)
220nK means 220nF 10% so these are 0.22uF 10% film caps and I would recommend at least a 400V cap here. These may be reasonably good film caps so expect to spend a significant amount of cash to get something better. These are the coupling capacitors to the output tubes.

You need the schematic.. One area I can see where an immediate improvement might be made is to replace the 33K and 39K phase splitting resistors with something other than metal oxide.

Yea Kevin is right about the value.

kevinkr 9th March 2012 11:56 PM

Cayin is a Chinese audio manufacturer. They make all sorts of gear, mostly tube.


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