Identifying this capacitor in my Cayin TA-30 amp

tjacobson · 9th March 2012, 04:55 PM

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

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

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.

9th March 2012, 06:03 PM	#3
firechief diyAudio Member Join Date: Sep 2008 Location: Near Seattle Wa	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. __________________ "You can keep your insurance baby nothing is guaranteed" -Tom Petty

9th March 2012, 06:08 PM	#4
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	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. __________________ "Extraordinary claims require extraordinary evidence." - Carl Sagan

9th March 2012, 11:56 PM	#9
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Cayin is a Chinese audio manufacturer. They make all sorts of gear, mostly tube. __________________ "Extraordinary claims require extraordinary evidence." - Carl Sagan

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9th March 2012, 05:51 PM	#2
overtheairbroadcast diyAudio Member Join Date: Jan 2012 Location: Canada	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.

9th March 2012, 06:09 PM	#5
tjacobson diyAudio Member Join Date: Feb 2011	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

9th March 2012, 06:33 PM	#7
tjacobson diyAudio Member Join Date: Feb 2011	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)

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