[Heath] Heathkit HX 20 Revival

[Scott Roberts]

I'm still looking for a transmit relay for one... 7 poles, a mix of SPST, DPST, etc...

Scott


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On Mon, 4/28/14, Guy Giacopuzzi <gggdds at js-net.com> wrote:

 Subject: Re: [Heath] Heathkit HX 20 Revival
 To: "John King" <k5pgw at yahoo.com>, heath at puck.nether.net
 Date: Monday, April 28, 2014, 1:43 PM
 
 
   
 
     
   
   
     John,
 
     Are you familiar with general trouble shooting? 
 First, I would
     check to see if you have plate voltage on the
 final...then,  look
     for plate current (any), then look for a dip when you
 tune...I'd
     have to see the schematic for anything further....watch
 the hv...it
     could be substantial, even in a lowly hx20...I've
 never owned an
     HX-20...is this the one with the singel 6146 final?
 
     Guy,
 
     WA6OQQ
 
     On 4/27/2014
 1:33 PM, John King wrote:
 
     
     
       I obtained a previously owned HX 20 MOBILE SSB
 and CW transmitter in good cosmetic condition. I have had it
 for about four years and decided to connect it to the
 matching AC supply, I built one from a kit in 1962 and used
 as a fixed station until I traded it off in 1967.Upon
 looking underneath the chassis of the one I have I can't
 believe I built one from a kit in 1962, while attending
 Graduate School at LSU. It was a great little transmitter..
 I wouldn't attempt to do that today at almost 76 years
 of age.
 
 While familiarizing myself  with the HX 20 I changed it over
 to 6.3 vac filaments and connected it to the matching power
 supply. So far, all I get is in the spot position at 3.750
 KC on a receiver across the room. The spot signal is strong
 but so far, I haven't been able to get any power out of
 the final or any reading on the relative output meter. I
 have it to a Bird watt meter and a Heathkit dummy load. If
 there are any HX20 folks who have one or are super familiar
 with the HX 20, I would appreciate  your input about what
 might be limiting the function to a VFO spotting signal,  I
 seem to remember that there were weak spots in the HX20 even
 though  it was a great little transmitter. I seem to
 remember a 6EA8 oscillator/miser that  might give problems.
 I know that the 6EA8
 has always been suspect in any rig.
 
 The benefit of your experience and knowledge of the HX 20
 will be appreciated. This transmitter has been on the shelf
 for years.,
 but has been kept in a good environment. Thanks and 73,
 John, K5PGW
 
 
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