You are right, I should be searhing around for some voltage out of spec. 73,
Alan Quoting Brett gazdzinski <[EMAIL PROTECTED]>: > 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 > > ______________________________________________________________ > > AMRadio mailing list > > Home: http://mailman.qth.net/mailman/listinfo/amradio > > Help: http://mailman.qth.net/mmfaq.html > > Post: mailto:[email protected] > > AMfone Website: http://www.amfone.net > > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb > > > > ______________________________________________________________ > AMRadio mailing list > Home: http://mailman.qth.net/mailman/listinfo/amradio > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:[email protected] > AMfone Website: http://www.amfone.net > AM List Admin: Brian Sherrod/w5ami, Paul Courson/wa3vjb >
