[Hammarlund] Weird HQ-110 problem

[Mark Johnson]

Phil;
Is there any change with the AVC on or off? My first thought would be to 
check the AVC circuit...Does backing  off the RF gain control make any 
difference?

Mark V Johnson VE3DJU/VE3DDI

----- Original Message ----- 
From: "Phil Galasso" <k2pg at worldnet.att.net>
To: <hammarlund at mailman.qth.net>
Sent: Saturday, November 24, 2007 11:33 PM
Subject: [Hammarlund] Weird HQ-110 problem


>I am having an unusual problem with my HQ-110 receiver. With no signal 
>being
> received in "REC" (AM) mode, there is no background noise. The receiver is
> completely silent. Above a certain signal threshold, the S-meter will move
> and I will hear a signal, which sounds normal. At the threshold, the 
> signal
> sounds badly distorted. With the exception of the distortion at this 
> signal
> level threshold, it sounds as if there is a squelch circuit operating,
> despite the lack of a squelch circuit in this receiver.
>
> I replaced two resistors, the screen resistor for the pentode section of 
> the
> 6AZ8 tube (last IF stage) and a resistor in the cathode circuit of one of
> the diode sections of the 6BJ7 tube, as they had changed value with age.
>
> I tried substituting tubes, but I did not have a 6BJ7.
>
> Any ideas? I have been pulling my hair out over this.
>
> Phil G.
> K2PG
>
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