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In Reply to: Just FWIW posted by Ralph on February 21, 2014 at 09:41:39:
I mentioned that in a post below, and I calculated that for a 30-ohm cathode resistor (per cathode of a 7241), I would need about 3000uF to bypass audio with -3db at 2Hz. (With 3 cathodes in a 7241, that would give me a net of 10 ohms to ground.) "3000uF" was calculated "in my head". When I later did it with an actual calculator, I get ~2600uF. But since the voltage is very low across the resistor, one can get away with very high quality electrolytics as used in filament supplies (16V ought to do it at practicable values of R). Then bypass the lytic with a good film cap, which can also be small in size because low in voltage.
Having said all that, I am not at all certain that I will try it.
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Follow Ups
- Yes, I agree, 2 Hz cut-off - Lew 10:44:31 02/21/14 (0)
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