Hi Mike,
your problem is in SSB or also in CW mode or in both?
There are no visible spikes on DB6NT 144MHz transverter/25W out.
Firmware 2.10 now implemented.
73!
Lexa, ok1dst
AD6XY - Mike napsal(a):
Thanks for the Email suggestions.
Setting tune power back to normal did not fix it. It fixed it for one cycle.
I also had my K3 lockup in the config menu. I suspect some problem with the
new beta firmware to be the cause, possibly corrupted memory or something
like that. I have gone back to the old firmware and the system is working.
The overshoots are still there as you adjust the power control but they are
much smaller.
Mike
AD6XY - Mike wrote:
I have come across a problem with my K3 driving an XV50 converted to
70MHz.
The K3 low level output from the KXV3 produces high power spikes before
settling to the correct level - which it then holds until you change mode,
or power setting. It also produces spikes at full power ( a few mW) as you
turn the power knob. When I originally tested the transverter interface, I
used an analogue power meter, so I would not see these spikes. I can see
them clearly on my oscilloscope for a few fractions of a second before the
ALC acts.
The effect is of course for the transverter to over drive and then settle
back. Obviously I am doing something wrong here but I am not sure what it
is. The K2 does not do this but it is making transverter operation
impossible with my K3 until I can find out how to fix it.
The curious thing is the way the spikes appear as you adjust power. It is
like the CPU is forgetting the ALC setting, reading the op-amp output,
thinking for a bit and then setting the correct gain. I must have some
setting set incorrectly.
Mike
PS
The K3 also suffers from the same transverter failure mode as the K2 - if
you power off the radio in a transverter band, the transverter stays on in
transmit mode because of the way the PTT works and because the K3 does not
send an "off" command on the auxbus before shutting down. The result is a
very hot transverter power amplifier module the next morning. Perhaps we
could fix this using one of the digital outputs?
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