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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: A cap in series with the signal and driving some impedance or resistance... posted by Nickel Core on July 3, 2005 at 09:58:13:
Dear Jeffrey,Thank you, this is very helpful but...
I checked my amp, and the first coupling cap (0.22uf) is driving a 2200 ohm load and the second cap (0.47uf) is driving a 3300 ohm load.
Actually the first coupling cap drives two resistors of 2200 ohm in parallel since the second stage uses a double triode (5687) with both sections paralleled.
According to your formula this translates to 328hz of the 0.22uf cap driving a 2200ohm resistor and 102hz for the 0.47uf driving the 3300ohm resistor.Quite a bit of 1.5hz.
Either I have the resistor values wrong, (my ohmmeter failed so I can't check), my math fails or something else is going on.
Why between 0.7 and 1.5Hz btw?
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Follow Ups
- Don't read other reply of me, crappy typing - Nickel Core 10:10:21 07/03/05 (4)
- Anyone--what's the input impedance of a 5687? (NT) - jeffreybehr 15:24:19 07/03/05 (0)
- Hmm...testing me, huh? :-) - jeffreybehr 15:23:32 07/03/05 (2)
- Re: Hmm...testing me, huh? :-) - Nickel Core 03:08:58 07/04/05 (1)
- "Is this because the caps sees two sections in parallel?" Yes.... - jeffreybehr 13:15:48 07/04/05 (0)
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