Loren -
It's highly unlikely that BOTH PTOs would develop the jitters at the
same time, so the problem is probably elsewhere. Does this occur on ALL
bands, in particular both 80M and 40M for example?
IF it appears on BOTH 80M and 40M, then my next suspect would be the
contacts of relay K2.
Hi Garey,
I will have to try what you are suggesting and see if the instability is
localized to 40m (where I am mostly), or is on the other bands. Will
let you know.
As to how I am determining it, I am mostly on digital modes (mainly
PSK31) and I am seeing the jumps when viewing the
What factors could contribute to frequency instability EXTERNAL to the PTO?
My TR-4C has just developed a jittery frequency, jumping back and
forth around center freq by as much as 50Hz. I know someone (if not
many) will refer me to the excellent articles on PTO rebuilds, but
before someone
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