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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: Bipolar vs MOSFET vs J-FET posted by john curl on January 26, 2007 at 15:38:47:
Hi JohnGranted that in the old days it was common to see crappy electorlytics, ceramic discs (which are piezoelectric and some drifted with temp) and sometimes Tantalums in audio chains where they don’t belong.
Under measure, there were clear “issues†so far how far they were from a “pure†reactive element.Are you saying that nowadays a good polypropylene cap (I mean electrically good, not boutique) still has a signature (aside from what ever change its reactance imposes)?
Fwiw, where low losses were needed in high power, high current RF was used in EM levitators, I found Pyrex dielectric had about the lowest losses.
Best,Tom Danley
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Follow Ups
- Re: Bipolar vs MOSFET vs J-FET - tomservo 18:06:33 01/26/07 (5)
- Re: Bipolar vs MOSFET vs J-FET - kurt s 22:08:08 01/28/07 (0)
- I don't know if I'd say signature but..... - Russ57 12:26:27 01/27/07 (3)
- Re: I don't know if I'd say signature but..... - john curl 23:10:36 01/27/07 (2)
- I thought active parts make the "largest" difference ? - cheap-Jack 08:54:17 01/29/07 (0)
- Re: tantalum - hitsware 17:06:48 01/28/07 (0)
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