[Heathkit] HX-20 alignment problem

[Bill Cromwell]

Hi Sandy,

I'm voting with Pete on the receiver overload. But don't ignore Kevin's 
advice, either. I have favored separate transmitter and receiver from 
the beginning and I have observed Pete's description of an overloaded 
receiver a time or two. Reduce the gain of the receiver if the 
manufacturer allows you to. Shorting the antenna input to ground will 
attenuate the input quite a bit.

73,

Bill  KU8H


On 02/27/2016 07:51 PM, Alexander N. Gerli wrote:
> Hi, everyone!  This is going to be a needle-in-a-haystack question, but
> here goes:
>
> I have a nice HX-20/HR-20 pair. So far, the receiver is great, and I'm
> trying to align the TX by the Manual. So far, I have the 9MHz IF
> transformers peaked and the 80m Mixer and Driver coils peaked. Now, I'm
> trying to get to the carrier null part. I've hit a wall, as when I use the
> mic PTT and listen for the signal in a monitor RX, the signal sounds AWFUL.
> It's not a carrier, but a garbled-sounding rough buzz, and this is with no
> TX audio per the Manual. It should be a decent CW note, but surely not
> THIS! Makes me think it's self-oscillating, but that's not happening
> because when I let off the PTT, no signal and the T/R Relay is working as
> it should, So far, the alignment procedure has gone without a hitch.
>
> Anybody have a guess what might be amiss? I was getting about 40W into my
> metered dummy load and that's about correct for a single 6146.
>
> ​73,​
>
>
> ​Sandy AC1Y​
>
>
> Alexander N. Gerli, Sr.
> 548 Allred Mill Road
> Mount Airy, NC 27030-2202
>
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