[Hallicrafters] A "preliminary" HT-37 look-see

[George KB2Z]

Hi Phil,
I dont operate much these days so I am only offering an opinion. I dont 
like the HT-37 for CW. It  does sound good and gets good reports. You can 
even get sidetone if you dont mute the rx in tx. My main gripe is 
(unmodified) it has to be in MOX to work CW. The rx is switched off when 
the 37 is in MOX, so you have to keep switching between MOX and Standby or 
Cal. each time you change from tx to rx. I'm more concerned about wearing 
out the switch than using it. There are a few different but similar QSK 
mods that are easy enough to do. The PTT mod is a one wire and a two pin 
mic. input change. I have 2 HT-37s One is modded the other is stock. I 
enjoy them both when I can.
Good luck with the 37, 73 George KB2Z

At 12:39 AM 11/20/04 +0000, you wrote:

>Hi Y'all,
>
>Today I just HAD to do a "brief" survey of the overall condition of my 
>HT-37 transmitter.  The power cord was hard, dry and cracked along it's 
>entire length, I replaced that with a nice new 3 wire cord.  Even if I 
>decide to eventually sell/swap it "as-is" I would NOT accept the liability 
>of that power cord ;-)
>
>Here is what I found on this transmitter.
>1.  ALL tubes except the 12BY7 driver and 6146 finals are original 
>Hallicrafters branded tubes.  The RCA 6146's 'may' be original as they are 
>date coded '61 which matches the other tubes in the set (1961-1962).
>
>2.  Tubes all tested good, BUT suspect a pair of 12AT7's in the Sideband 
>generator should be replaced, marginal, not balanced.
>
>3.  I'm quite certain that I lucked out and got one with a good power 
>transformer, at least it tests that way with the Ohmmeter etc.  BUT, I 
>won't apply power till it's well backed out, silicon rectifiers installed 
>and the 5 Volt filament lines disconnected from the tube sockets to avoid 
>the common HV-5 Volt to ground shorts.
>
>4.  It appears that if I do the above mods, replace all the filter 
>capacitors, this puppy may be "good".
>
>Next time I have a little "jingle" in my jeans I will probably order the 
>filter capacitors and rectifiers (and a couple 12AT7's) and see if this 
>puppy will come to life.
>
>How well do they work on CW?  Are they a CW op's delight or nightmare?
>
>73 de Phil,  KO6BB
>http://users.mercednet.com/beaconeer/
>Merced, Central California, 37.3N  120.48W  CM97sh
>
>***************************************************
>* RECEIVERS:                                      *
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>* ANTENNAS:                                       *
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>*  #4. 15 Meter-band Inverted Vee oriented NE/SW  *
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