HX-20 HELP!!!!!

[Jim Roik]

Hi Sandy.

I've just done two sets, a Drake and an HW-101 that had that problem. In one
case the problem was a durty contact on a switch. Anyhow, I started by
pulling the finals and then hanging the probe on the output of the driver. I
kept going backwards until I found the signal and then figured out why I
lost it.

I guess you could go forwards from the het oscillator, but I'm the kind of
guy that always looks in the back of the book for the answer.

By the way, the problem in the Drake was a dirty pin on one of the mixer
tubes. Had input to it but no output.

Jim
----- Original Message -----
From: Sandy Gerli <angerli at HOME.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Sunday, February 27, 2000 2:52 PM
Subject: HX-20 HELP!!!!!


> Hi, gang,
>
> Well, I'm stumped. My HX-20 seems dead as a stone, except for a
> whopping good spotting signal. My HR-20 is hot as a pistol so thank
> goodness for that.
>
> I can get a loud spot signal into the HR-20, so I know the SB
> Generator, mixers, IF and VFO are working. The spot signal peaks
> with the drive tune as one would expect. Beyond that, there's no
> indication of output. I've discovered a smoked R76 which I replaced.
> Also, R81 and R82, the two 7W resistors in the 150V LV line,  have
> increased in value beyond 10% so I'm going to change them, but I
> doubt that they're at the root of the problem.
>
> Does anyone have any suggestions as to where I should hang an
> o'scope probe to start looking for lost signals in the chain? I'd
> sure appreciate some suggestions.
>
> 73,
>
> --
> Sandy Gerli, AC1Y
> 500 Country Club Road
> Avon, CT  06001-2406
> (860) 675-5566
> E-Mail: angerli at home.com
>
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