>This also is just another example of our strange predilection to always
>blame the K3 first, which after noting what actually was found, is most
>often just dead wrong.
>Guy K2AV
Yes. The problem almost always is not with the K3. I'd say 80% of the time it's
the logging or computer program con
A LOT of the 86's, 87A's and 89's have had the pin diodes removed
because of the usual problems with pin diodes and replaced with a
relay board. This has been done just because the owner is tired of the
expense of the TX pin diodes, or living in circumstances that
frequently present pin diode blow
Hi, Lee,
K3 does not have a T/R relay in the RX path. It uses PIN diodes, which are
just peachy fine at 100 watt power levels. Amplifiers are another separate
problem. QSK is a strain on any amplifier running 1500 watts. This is
because affordable PIN diodes for the usual circumstances sort of dis
Lee,
The Alpha 87A uses PIN diodes for t/r switching, so unless someone
modified it, it's not the amp t/r relay, which is the usual culprit for
this problem.
It could also be a poor connection somewhere in the antenna circuit.
Sometimes a coax plug or socket is oxidized (or whatever) and it
Towards the end of CQWW CW, I was having issues with the K3 not getting back
to receive when I stopped transmitting. This was an intermittent problem -
if I keyed the radio again with a dit or two, I could get back to full
receive. I could still hear signals, but greatly attenuated when the relay
5 matches
Mail list logo
