I would be tempted to replace the 120VAC relay with a dc relay and key it
directly from the rig. Don't forget to fit a diode across it to squash the
back emf. This may have other ramifications and might not be this simple,
but it's well worth consideration.
David
G3UNA
The FAQ for the K3 promised a 0-50 ms amp keying delay. We got only 0-20 ms
in the latest release. I don't think 20 ms is enough in my case, based on
my primitive research. Several "experts" have said mine might need as much
as 30-35 ms. My amp's relay is a 30 yr old Potter & Brumfield open frame
model with a 120vac coil.
To make things worse, since the K3 will not switch 120vac, I must use
another relay with a 12vdc coil in the line between the K3 and the amp,
which in turn pulls in the P&B relay. This exacerbates the matter by taking
even more time, and I'm afraid to try anything for fear it will damage the
K3 and the amp. Am I wrong?? Anyone care to comment??
One of the many reasons I bought the K3 was to be able to operate at least
semi break in CW and VOX with my old amp without hot switching, by virtue of
having ample switching delay. I've waited months for the feature and am
disappointed..
However, I hasten to add this: As a K2 user/owner/builder, I expected much
in the K3. I got much more than I expected. I gave up a nice Icom Pro 3
for the K3 and don't miss the Pro 3 one iota. The K3 is unbelievable in
what it can do and how superbly it does it. And getting new firmware is
icing on the cake.
But I sure wish I had 0-50ms amp delay capability! How about it, Wayne?
George, N4YM
K2 # 4758
K3 # 340
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