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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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I've been looking at various tube amp circuits in an attempt to learn more about them, and I have a question that probably has a very simple answer.In one schematic, for example, the plate of the input tube is coupled to the screen of the driver tube via two capacitors. One is a .22uF film type and the other is a 100pF mica. Since the mica cap is a few order of magnitude smaller than the film cap, its impact on the overall capacitance is relatively insignificant. What then, is the purpose of both caps?
Thanks in advance!
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Topic - novice coupling cap question - Bersani 09:23:35 10/30/05 (8)
- Re: novice coupling cap question - ottoamps 21:27:56 10/30/05 (6)
- here's an example - Bersani 21:50:51 10/30/05 (5)
- If you're talking about the 0.47µF coupling cap paralleled by the 20nf cap, yes... - jeffreybehr 23:12:50 10/30/05 (4)
- Re: If you're talking about the 0.47µF coupling cap paralleled by the 20nf cap, yes... - Bersani 16:00:50 10/31/05 (3)
- Well, lots of us have different ideas about bypassing. If I were trying to save money and get GOOD (but maybe not... - jeffreybehr 20:10:40 10/31/05 (0)
- Re: If you're talking about the 0.47µF coupling cap paralleled by the 20nf cap, yes... - MIchael Samra 17:35:15 10/31/05 (1)
- TY, Michael. (NT) - jeffreybehr 19:52:45 10/31/05 (0)
- Re: novice coupling cap question - Chris O 15:51:28 10/30/05 (0)
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