In Reply to: EICO HF-85 hum problem need help posted by thereminhead85@hotmail.com on September 4, 2004 at 18:21:21:
That's what the innards of the *device* is called. Very common and you may build it with descrete caps and resistors. See the Heathkit SA-2 or AA-151 for one example.
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Follow Ups
- Re: Baxandall tone stack - Ron Oehlert 12:29:55 09/05/04 (1)