Hello!
What about 0,1uF silver micas as coupling caps in tube amps - instead of copper foil, beeswax, teflon and PIO?
Cheers,
Tom
What about 0,1uF silver micas as coupling caps in tube amps - instead of copper foil, beeswax, teflon and PIO?
Cheers,
Tom
Yikes, those things must be enormous!
That's the only reason, besides cost. Which doesn't seem to deter the idi...erm, fanatics.
Tim
That's the only reason, besides cost. Which doesn't seem to deter the idi...erm, fanatics.
Tim
Hello!
I asked about the suitability for audio, especially in valve amps...
They aren't that big, 2" x 1 174" x 1/4", 0,3% tolerance, 350V and price is $16 for 10
cheers,
t
I asked about the suitability for audio, especially in valve amps...
They aren't that big, 2" x 1 174" x 1/4", 0,3% tolerance, 350V and price is $16 for 10
cheers,
t
Hi,
I expect the high frequency response will be better or even say "TOO much" with the silver mica capacitor as the coupling path.
😀
I expect the high frequency response will be better or even say "TOO much" with the silver mica capacitor as the coupling path.
😀
I'll take mine without the snake oil....
Since they come pretty close to being the "ideal capacitor", they should be fine 😉
Since they come pretty close to being the "ideal capacitor", they should be fine 😉
Hi,
Amen to that...
350VDC is likely to be a little low for some applications so be careful where you put them.
I'm curious to know what you think about the sound, never found them in .100µF values.
Mostly use them in RIAA correction where they do an excellent job.
Cheers,😉
Amen to that...
350VDC is likely to be a little low for some applications so be careful where you put them.
I'm curious to know what you think about the sound, never found them in .100µF values.
Mostly use them in RIAA correction where they do an excellent job.
Cheers,😉
Hi Frank,
Did you read this?
http://www.diyaudio.com/forums/showthread.php?s=&postid=262664#post262664
Did you read this?
http://www.diyaudio.com/forums/showthread.php?s=&postid=262664#post262664
Hi Peter,
Thanks.
Interesting thread...
To be perfectly honest, I had no idea whatsoever those small values even existed in Teflon.
Currently I use polysterenes or metalized polypropylenes for the simple reason that I don't easily find the silvered micas in the values and tolerances I need.
Metallic powder,he? Never noticed any of it, I swear.
Then again it's not that obvious when you use only a pair per channel burried in a correction network, I presume.
Next time I'll give the Teflons I fair shot.
Cheers,😉
P.S. I had no idea one could catch a handful of philosophers just by posting an excerpt of a book...
SLIPPERY SLOPES.... 😉
Thanks.
Interesting thread...
To be perfectly honest, I had no idea whatsoever those small values even existed in Teflon.
Currently I use polysterenes or metalized polypropylenes for the simple reason that I don't easily find the silvered micas in the values and tolerances I need.
Metallic powder,he? Never noticed any of it, I swear.
Then again it's not that obvious when you use only a pair per channel burried in a correction network, I presume.
Next time I'll give the Teflons I fair shot.
Cheers,😉
P.S. I had no idea one could catch a handful of philosophers just by posting an excerpt of a book...
SLIPPERY SLOPES.... 😉
Hi there,
Honestly speaking, I had got an all FET preamp using silver mica capacitor on the feedback channel. This silver mica capacitor is from RS components and have a tolerance of 0.5%
What I should say the sound will be a little bit metallic on the high frequency range. After that I changed the cap into a pp one. The outcome is more musical and natural.
I recommend the application for silver mica cap should be in precision instrument NOT audio.
Rgds,
Red
Honestly speaking, I had got an all FET preamp using silver mica capacitor on the feedback channel. This silver mica capacitor is from RS components and have a tolerance of 0.5%
What I should say the sound will be a little bit metallic on the high frequency range. After that I changed the cap into a pp one. The outcome is more musical and natural.
I recommend the application for silver mica cap should be in precision instrument NOT audio.
Rgds,
Red
I am also not a big silver mica fan. They sound very fast but too etched and metallic. Maybe usable in moderation. My favourite reasonably priced caps (no, teflon is NOT reasonable) are Jupiter beeswax.
Hi,
When I checked out CRC's website last night I noticed the small values we often need for RIAA correction networks in valve circuits aren't available in PTFE anyway.
By small I mean the range from say, 100pF to 47nF @ 400VDC.
So in most cases it's either silvered mica or polystyrenes (being fased out) or the new polypropylenes.
On paper at least the micas are closer to the ideal cap than any of the other types.
Cheers,😉
When I checked out CRC's website last night I noticed the small values we often need for RIAA correction networks in valve circuits aren't available in PTFE anyway.
By small I mean the range from say, 100pF to 47nF @ 400VDC.
So in most cases it's either silvered mica or polystyrenes (being fased out) or the new polypropylenes.
On paper at least the micas are closer to the ideal cap than any of the other types.
Cheers,😉
Yes the Teflon values don't go that low in value and their very costly. The Mica's, Ploystyrenes are the best for small value caps.
I have a few 500V 0.56uF teflon caps laying around. I was planning to use them for decoupling my Rifa 50V 68,000uF powersupply caps.
Is that any good or is it waste of good caps?
Magura🙂
Is that any good or is it waste of good caps?
Magura🙂
Use those .56uFs as coupling caps not as power supply bypass caps. They are great for signalpath and a waste anywhere else.
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