Hi group, I have the same problem K3ESE below had with the KX1 ATU. Same conditions, 12V external, 4-5W, good SWR match, start sending CW, hear the ATU grind a little, and then the SWR goes to 5.0 or 9.9. Then another tune and it does not grind, but tells me it is back to 1.0.
I did a little digging and found that when it goes into this bad state, the ATU mode has gone from TUN to CAL on its own. When I do the 2nd tune to get it out, all that is happening is that it is resetting from CAL back to TUN. I see this with a 28' wire in a tree with two 16' and one 24' counterpoise. When it tunes, it tunes to 1.0 on 30M and 20M and about 1.5 on 40M. Then on all bands, after I send CW for a few characters, I hear this clicking and the SWR jumps to a high number and the power out goes down. Then double-check the ATU state, and sure enough, it has been reset from TUN to CAL. Basically, the high SWR problem is only because it is bypassing the ATU and giving me whatever the random wire shows. I can reproduce this on a dummy load. However, the SWR does not jump up, because the dummy load has 1.0 to begin with, even when it automatically moves itself from TUN to CAL on its own. But I hear the same clicking happen when I start to send CW, and I can verify that it is resetting to CAL mode. When I turn the KX1 off in this funny state, and turn it back on, it has not remembered the last frequency I was on and starts at a different frequency. Was there ever a cause/fix to this problem ever found? It makes having a QSO really difficult when the SWR keeps jumping back and forth. Thanks and 73, Mike N9OHW ----- (original problem statement) ----- Lately, there have been a bunch of times when I power my KX1 with a 12V supply, activate the tuner to get a match, and the result is 4-5W and a good match. Then, while operating, or just while it's sitting, not being operated, I'll sometimes hear a few relays chatter for a split second, and the match seems to have been lost. When I transmit, I see that the power out is down to 2W or so. I need to activate TUN again, which will restore the match and the higher power out. Where can I look for the answer to this one...? thanks, LL/K3ESE K1#379,KX1#11,K2#4442(in the works) __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Elecraft mailing list Post to: [email protected] 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
