[AMRadio] Hammarlund HX-50 problem

[Jim Wilhite]

Bob, I am not familiar with the HX-50 but if it has a meter switch, check 
it.  The Globe Champion meter switch is notorious for dirty and intermittent 
contact.  You don't say, but if the power remains when the readings are all 
over the place I would look at the meter, the switch and associated wiring 
and shunts.

I have found meters that the stud for the output and input were loose and 
that caused intermittent connections to the meter, just be sure the 
circuitry and the meter functions the way it should.

73

Jim
W5JO

----- Original Message ----- 
From: "Rsauvan" <rsauvan at beyondbb.com>
To: "AMRadio" <AMRadio at mailman.qth.net>
Sent: Saturday, April 20, 2013 8:12 AM
Subject: [AMRadio] Hammarlund HX-50 problem


> Hi all,
> I bought a Hammarlund HX-50 a couple of weeks ago and fired it up. Had to 
> replace a couple of tubes but other than that it fired right up. It 
> wouldnt load up at first so I deoxed eveything a ton of times and it came 
> to life and had full output on all bands. But, it seems to be very 
> intermittent. It wont always load up. When it doesnt load up, I find the 
> PA Cathode current is at 50 ma like it should be, but when I put it in MOX 
> to start tuning, the PA Cathode current goes up to 75-80 ma by itself and 
> the drive control does nothing to adjust it. I am supposed to be able to 
> adjust the current on the meter at that point to get it to 100 ma. PA 
> tuning and PA load do nothing at this point either of course. I am very 
> new to this old radio fixer uppers so I am looking for any suggestions as 
> to what I might look into next to try to solve the problem. I realize it 
> could be a million things, but since it does work off and on maybe that 
> would narrow down the search for a cure a bit faste
> r? Any suggestions would be greatly appreciated.
>
>
> Thanks-Bob-W0YBS
> Estes Park, CO
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