good ideas, thanks.
Alan
Brett gazdzinski wrote:
Maybe the tube is out of bias, to much screen voltage,
or some resistor has changed value and the LO tube
voltage is varying around?
Maybe check things with the DMM?
Or maybe the bfo is changing, not the LO??
Brett
N2DTS
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Monday, April 10, 2006 9:49 AM
To: [email protected]
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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