is somewhat hard to explain. But rather frequently now
I get an oscillation showing up on my JT65 screen. You
can see it slowly sweep across the screen from right to
left. Strange thing I hold my hand over the case blower
it stops and goes the other direction. No doubt somewhat
have the input on the antenna that has not yet been
tuned (remotely) to frequency the oscillation is worse.
Put on the carrier to get the antenna tuner on
frequently and the oscillation considerably lower in
intensity, sometimes goes off.
it gets so bad nothing works I recycle it by turning
input DC power on and off.
It is considerably worse when I have the
to get it to quit or so low I can operate I make sure
the antenna is tuned to frequency. I turn on the
preamplifier. And when that doesn't work, turn the power
switch off and on.
It has been going like this for several
months. I talked to ICOM about it and they said to reset
it. That didn't do any good at all. The tech at ICOM
acted as if something like this could not happen.
out there have a parasitic oscillation running around?
rather inclined to think it is in the RF amplifier
James Brock 541-868-5827