[AMRadio] Re: NC-183D

[Peter A Markavage]

I'm back.
Actually, it looks like your early 183D, the 183, and the 173 all use
very similar S-meter circuitry. I didn't analyze every part but they look
very close. The HRO50 and 60 use one half of a 6SN7, like later
NC-183D's, as an S-meter amplifier. I have both the NC-173 and the later
NC-183D and both S-meter circuits seem to work well.
Pete

On Mon, 7 Oct 2002 16:09:25 -0600 "Tommye & Jim Wilhite"
<w5jo at alluretech.net> writes:
> Interesting Pete.  The radio I have must have been an early version 
> with the
> S-Meter that uses about the same circuit as the HRO 60 did.  Am I 
> correct?
> 
> 73  Jim
> de W5JO
> 
> 
> 
> 
> 
> > There are two versions of the NC-183D. As pointed out,one with 6J5 
> phase
> > inverter driving the 6V6's and the other, 6SN7 (half as phase 
> inverter
> > driving the 6V6's and the other half being the S-meter amplifier). 
> Early
> > NC-183D's, like NC-183's, had no S-meter amplifier. I have both
> > schematic's.
> > Pete, WA2CWA
> > P. A. Markavage
> > 27 Walling St.,
> > Sayreville, NJ 08872-1818
>

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