[AMRadio] RE: Yet another receiver update!

[Brett Gazdzinski]

Mike,
I will have to see if I have that QST, thanks.
I have been trying the various caps I dug out of the junk box.
I found a bunch of npo,s, and, a bunch of various n330, n750,
etc.

I first replaced all the caps with n750 types.
Startup drift was reduced, but after 5 minutes, the frequency
went way up...these things work!

I have it now with some npo caps, and some n330 types,
and in the first 5 minutes, it drifts down 900 hz, then drifts 
up 900 hz.

Brett
N2DTS



> 
> 
> Check November 1965  QST, page 29. A Compact Stable 5-Mc. 
> V.F.O.He uses a
> stolen circuit (probably from Hallicrafters) which uses a 20 pf dual
> differential cap and a 22 pf NP0 and a 22 pf N750 across the 
> tank. It is
> simply adjusted till the drift is ZERO. I think was probably 
> used in the
> HT-32 if memory serves. gives all values of compensation 
> without disturbing
> the frequency.. Mike K4XM
> ----- Original Message -----
> From: Brett Gazdzinski <brett.gazdzinski at wcom.com>
> To: <amradio at mailman.qth.net>
> Sent: Friday, March 15, 2002 9:09 AM
> Subject: RE: [AMRadio] RE: Yet another receiver update!
> 
> 
> > Bacon,
> > This was a great help!
> >
> > Looking at some of the web pages, I now get the ratings.
> >
> > Surplus sales has some good ones, I am looking for a few around
> > 68 and 150 pf.
> >
> > I
> 
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