|[AMRadio] HR-10 problem|
w1eof at hamnutz.com
Mon Apr 10 16:25:59 EDT 2006
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.
> -----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
> 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
> 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,
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