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? > > > -- View this message in context: http://www.nabble.com/K3-Transverter-drive-problem-tp18203550p18209835.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
