[Hallicrafters] HA-44 questions - continued

[Waldo Magnuson]

Earlier I asked:
When using my HT-44 transmitter in LSB at 7.2 MHz should I see any 
indication on the RF Output meter when transmitting.  I get the normal 
meter readings during the basic tuning procedure but no reading when 
transmitting.  Thanks.
73,  Skip  W7WGM

 From correspondence with KF9WV I learned that I SHOULD get a RF Output 
meter reading on CW, AM and SSB operations.  I had a bad section in the 
first audio amplifier and I now get output indications.  The output is 
a bit intermittent and I'm pretty sure the K1 (VOX) relay is a bit 
flakey.  It is a Potter & Brumfield 110 v DC KH-4272 relay.  I have two 
questions:
1) Does anyone know of a source for the KH-4272?
2) Has anyone removed the cover and cleaned the contacts of these 
relays.
Thanks.
73s,  Skip  W7WGM