[AMRadio] HR-10 problem


abeck at xplornet.com abeck at xplornet.com
Mon Apr 10 20:07:28 EDT 2006


I am sure I can find it.

Best 73
Alan



Quoting W1EOF <w1eof at hamnutz.com>:

> My HR-10B doesn't do it Alan, so it's not inherent in the design. As Brett
> suggested, look for voltages that are out of spec.
> 
> 73,
> 
> Mark W1EOF
> 
> > -----Original Message-----
> > From: abeck at xplornet.com [mailto:abeck at xplornet.com]
> > Sent: Monday, April 10, 2006 9:49 AM
> > To: AMRadio at mailman.qth.net
> > Subject: [AMRadio] HR-10 problem
> >
> >
> > Hi,
> >
> > I am running an HR-10 RX in my shack outside and am wondering how
> > to cure an
> > annoying fault. Or, this may be bad design, but I don't remember
> > this from when
> > I was a kid.
> >
> > When i turn up the RF Gain, and end up close to full on it, I get
> > a shift down
> > in frequency of the CW note. So far that I have to retune the BFO
> > to get it
> > back.
> >
> > The RF Gain is in series with the Cathode of the first RF stage of the RX.
> >
> > perhaps a Zener diode to cure it?
> >
> > And if so, I guess I should measure the voltage someplace and
> > clamp with a
> > zener, but then again, I would be modifying the whole circut.
> >
> > Anyone know how to fix this?
> >
> > Best 73,
> >
> > Alan
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