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Teflon Coupling Capacitors 0.1 0.2uF  for tube Amps
Teflon Coupling Capacitors 0.1 0.2uF  for tube Amps
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Old 12th March 2019, 03:15 AM   #1
Perfectusaudio is offline Perfectusaudio  Australia
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Default Teflon Coupling Capacitors 0.1 0.2uF for tube Amps

Hi, I am looking to start a new thread, on 0.1 uf and 0.22 uf Teflon Coupling Capacitors and any other 0.1-0.2uf suggestions for tube amplifiers under $60 USD each

The Russian FT1 FT3 K72 and now Solen SQ3 series all fit this category.
I am sure their are others and wonder what results people have had with these .
Their are Blogs comparing the FT1 FT3 and K72 to Vcaps but wonder how others have found them in coupling positions between say a driver tube and out put tube ie 6SN7 > 2A3 /300 single ended , or E280F > 2A3 /300B , Ra, CCS or Choke loaded

Last edited by Perfectusaudio; 13th March 2019 at 03:25 AM.
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Old 12th March 2019, 07:10 PM   #2
RajkoM is offline RajkoM  Bosnia and Herzegovina
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This is a matter of taste.
I have tried russian K72 teflon caps in my C3g-300B and E180F-6C33C SETs (CCS loaded drivers both). I could not wait for the "few hundred hours of break-in time" as some DIYers recommend for teflon capacitors.
I finally decided for Siemens MKV (B25839 axial capacitor) as coupling.

K72`s I have modified for the RIAA network.
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File Type: jpg modified K72 teflon caps.jpg (25.2 KB, 386 views)
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Old 12th March 2019, 07:23 PM   #3
euro21 is offline euro21  Hungary
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Teflon Coupling Capacitors 0.1 0.2uF  for tube Amps
I use -for years- 0.22uF FT-3 in my #26 preamp output ... parallel with 0.1uF tin foil V-Cap ... as parafeed cap to my TVC. I'm happy with it, the tonal balance is satisfying.
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Old 12th March 2019, 10:36 PM   #4
Perfectusaudio is offline Perfectusaudio  Australia
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interesting comments thanks
Has anyone done a direct comparison between Vcaps and Russian Teflons?
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Old 12th March 2019, 11:35 PM   #5
randytsuch is offline randytsuch
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Here are some cap reviews for you
Capacitor Musings Article By Jon L DIY Audio Kits Reviews

Russian teflons and vcaps are in the mix, along with a host of others.

I also read somewhere that the Russian caps sound better if you cut the case off, stick them in a new case with better leads. Never got around to trying it.
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Old 12th March 2019, 11:46 PM   #6
analog_sa is offline analog_sa  Europe
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Teflon Coupling Capacitors 0.1 0.2uF  for tube Amps
The only teflons i've tried are FT3 and Sonicap Platinum. Hated both, especially the russians, which were just awful in my system.

Whenever possible i try to avoid coupling caps but if avoiding them is too hard my choice goes for Clarity MR, Mundorf S&G or ancient Bosch MP. Yes, they all sound very different, but unlike the teflons excel at communicating music. None of which means the VCaps are not excellent.
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Old 12th March 2019, 11:54 PM   #7
analog_sa is offline analog_sa  Europe
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Teflon Coupling Capacitors 0.1 0.2uF  for tube Amps
Quote:
Originally Posted by randytsuch View Post
I also read somewhere that the Russian caps sound better if you cut the case off, stick them in a new case with better leads.
Tried that too with the single Ft3 type i had: 0.22/600. A very minor improvement.

Btw, the Sonicaps had an incredible extension on both ends compared the the FT3. Midrange presence too. But overall tiring and unnatural.
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Old 13th March 2019, 12:13 AM   #8
Perfectusaudio is offline Perfectusaudio  Australia
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I have now got K72/FT3/to try in a new E280F/300B amplifier

Will gather Audio Club Members and also try Russain Paper K40Y and oil

Dearborn / Sprague V710P/730P that Yamamoto insert into bits of wood
Audio Cap Theta

Solen SQ3

And see what happens
Will use Electra-Print Iron I have spare and also Amorphous Double C core .
I tried Nanocrystalline-Finement from Teramoto in a 2A3 but it was hyper detailed in the mids and top end not for all tastes, the old M19 Electra-Print has more bass than any i have used so far and even sound top to bottom.
The Amorphous had a lovely balance through out .

Sorry digressed away from Caps
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Old 13th March 2019, 03:27 AM   #9
Perfectusaudio is offline Perfectusaudio  Australia
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Hi, I have opened up the thread to any other 0.1 - 0.47uf coupling capacitors, so as to not restrict comments as I believe this will be a useful thread for many to comment on.
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Old 13th March 2019, 04:52 AM   #10
JMFahey is offline JMFahey  Argentina
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Quote:
I also read somewhere that the Russian caps sound better if you cut the case off, stick them in a new case with better leads.
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