[Hallicrafters] HA-1 keyer

[jim]

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