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Posted by Mike Langner on 6/5/2005, 8:11 pm Thanks in advance and 73 ! Mike -- K5MGR
216.184.14.71
Hello ! I'm restoring a Heathkit HW-5400 that the previous owner built and could never make work right. I've gotten all of the (his) bugs out of it, except for this problem: the master oscillator moves about a hundred cps between transmit & receive. There is no change in VCC on the oscillator or the buffer, so I'm suspecting "ground jump" -- a condition related to the fabled "ground loop" where measuring oscillator to chassis becomes irrelevant as a change in I squared E drop is induced in the oscillator VCC- return -- but I'm guessing at this point. Any pointers from anyone?
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