[Milsurplus] BC-375 neutralizing cap?
Mike Hanz
AAF-Radio-1 at aafradio.org
Fri Aug 31 07:59:45 EDT 2007
It's not a neutralizing capacitor, Ian. The assembly is capacitors 1103
and 1104 on the circuit diagram. Sez "Capacitor 1104 is the calibration
reset, by which the master-oscillator frequency can be adjusted to
correspond to the calibration whenever the oscillator tube is changed.
Capacitor 1103 provides thermal compensation for frequency drift
normally caused by warmup and variation of ambient temperature of the
oscillator tube."
73,
Mike KC4TOS
Ian Wilson wrote:
>Recently picked up a 4-pin socket (VT-4C type). Included was a
>neutralizing capacitor. This one appears to have 3 connections, which
>puzzles me.
>The central plate is fixed, while the two outer ones are adjustable
>relative to the
>centre (each plate is a bulbous circular disk).
>
>(Since writing this I took a look at the BC-375 schematic, and don't see any
>neutralizing caps. But it's a triode rig .. did I miss something?).
>
>Looking for enlightenment.
>
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