[Hallicrafters] HA-1 keyer

[Sven Grandell]

Jim, Think you have too much voltage into the 0A2/0B2 tubes. I looked for 
the same case in at least 20 years!
Corrected it by a new R30 on 2700 ohms.
Good luck!
Sven, SM3SV


Hi . I just put a HA1 back into service but am having some problems. erratic 
cw when first starting up. also the OB2 tube looks like it goes into self 
oscillation for a spell. have to shut it off and start it up again.I have 
had a few of the TOs. in the last 40 years and seems like I had that same 
problem with the OB2 a few times. never could get it corrected. any 
pointers???
                                    Jim N4ZY
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