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

[Philip Atchley]

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

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* RECEIVERS:                                      *
*  #1. Homebrewed "Mitch Lee" Design              *
*  #2. Hallicrafters SX-71 (1955)& VLF Converter  *
* ANTENNAS:                                       *
*  #1. 20 Meter long "loaded" Sloper oriented E/W *
*  #2. Half Sized G5RV Inverted Vee oriented N/S  *
*  #3. Roof mounted Hustler 6BTV 6 band Vertical  *
*  #4. 15 Meter-band Inverted Vee oriented NE/SW  *
*                                                 *
* Number of different NDB's heard: 974            *
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