I love these cap discussions ! ( or do I ?... )
I definitely feel 'best caps' are signal level/current dependant.
PIO's are great if the current and voltage swing are enough . Jensen coppers are superb in power amps ( valve circuits of course ) and speaker crossovers. At phono and line-level I've yet to find much better than Mundorf ZN's , and that includes their overpriced metaliised-film silvers and silver-golds.
Honourary mention for the White ones ( used to be Audyn Plus ? ) metallised , in crossovers, they punch well above their weight.
I definitely feel 'best caps' are signal level/current dependant.
PIO's are great if the current and voltage swing are enough . Jensen coppers are superb in power amps ( valve circuits of course ) and speaker crossovers. At phono and line-level I've yet to find much better than Mundorf ZN's , and that includes their overpriced metaliised-film silvers and silver-golds.
Honourary mention for the White ones ( used to be Audyn Plus ? ) metallised , in crossovers, they punch well above their weight.
How the cap is used matters, too. A cap sitting there doing hardly anything without AC voltage across it isn't going to be a good place to put an expensive part.
If it's used in as a tuned element in a filter or crossover, then the value and stability of the part is important. In that application, there will actually be significant AC voltage across the capacitor (which is the only way technical capacitor tests I've ever seen are done - the one putting 60VAC across a cap? -- sheesh!).
If it's used as a DC block feeding a highish impedance, then the value doesn't matter much at all beyond being "big enough", and AC voltage across it should also be negligible when it's "big enough". And of course, since everyone can imagine their audio signal being pushed through it, this is the one people usually spend big bux on)
Bypass capacitors, value also isn't critical (variation won't matter much), but if the supply ripple is really bad or high currents go through the part, then maybe (just maybe, IMO. And then I'd look at ESR rather than what magic material the plates are made from).
If it's used in as a tuned element in a filter or crossover, then the value and stability of the part is important. In that application, there will actually be significant AC voltage across the capacitor (which is the only way technical capacitor tests I've ever seen are done - the one putting 60VAC across a cap? -- sheesh!).
If it's used as a DC block feeding a highish impedance, then the value doesn't matter much at all beyond being "big enough", and AC voltage across it should also be negligible when it's "big enough". And of course, since everyone can imagine their audio signal being pushed through it, this is the one people usually spend big bux on)
Bypass capacitors, value also isn't critical (variation won't matter much), but if the supply ripple is really bad or high currents go through the part, then maybe (just maybe, IMO. And then I'd look at ESR rather than what magic material the plates are made from).
CLASSIC 1983~1988 USSR Teflon Capacitor FT-3 0.47uF 470nF 200V +/-5% 1pc.+
this type, F-3, is also available in different values, i.e. 0.1, 0.22, 0.33.
something like a contact high ....
```````````````````````````````````````
something else -
Cinefex :: Visual Effects Magazine :: Special Effects :: CG :: Computer Graphics
Great value caps.These aint pretty either but for $11 they sure sound great.
And they take current like no one's business - multi HP, AC compressor motors running 24/7.
For $11.00 it's worth cutting the can open and pouring the oil out.
Check back when you have checked out that oil.
Dan.
for tweeters, vintage aluminum foil and waxed paper - less than a dollar shipped
for ~ $3 for ~1uF, Dayton offers foil and polypropylene in a 0.47uF package
http://www.parts-express.com/dayton-audio-dffc-047-047uf-400v-by-pass-capacitor--027-458
An externally hosted image should be here but it was not working when we last tested it.
for ~ $3 for ~1uF, Dayton offers foil and polypropylene in a 0.47uF package
http://www.parts-express.com/dayton-audio-dffc-047-047uf-400v-by-pass-capacitor--027-458
Last edited:
Since it says on the label "No PCB's" (greengrocer's apostrophe theirs), likely not.
Actually, she was having the time of her life. She had her head hanging out the car window, and when we hit about 70mph, her cheeks inflated like that and started flapping. Tail wagged furiously. My wife caught this in the rear view mirror. I love the image, but yeah, Binky was fun too.
It's really nice that XSim let's you enter ESR for caps. Makes it easy to see if a bypass cap is going to make a material change.
I tried adding a copper foil cap (0.1uF) with almost no ESR around a 4.7 with fairly high (0.3 ohms) ESR and it was audible and visible in the simulation. Ended up moving the bypass cap somewhere else.
Best,
Erik
I tried adding a copper foil cap (0.1uF) with almost no ESR around a 4.7 with fairly high (0.3 ohms) ESR and it was audible and visible in the simulation. Ended up moving the bypass cap somewhere else.
Best,
Erik
No PCB's are outlawed nowadays.....NOS may have PCB's.
IME the oil is a processed canola oil with additives.
IME the result is coloured, thick and foul....might put you off oil capacitors.
Dan.
with a cheap cap meter, a Dayton 0.1uF 400v foil and film cap reads just the cap value of 101.4nF - a 0.1uF 500v MBM foil - paper cap reads 127.0nF with Vloss = .3% - neither show an ESR value.
The ASC motor-run types like those mentioned slosh around like they are filled with water. It's likely a lot thinner than you describe.
Later,
Wolf
- Status
- Not open for further replies.