My K3 has the KAT3 ATU fitted and I therefore have the options of selecting ANT 1 and ANT 2. I use the K3 with the SPE Expert 1K-FA amplifier.
After looking at the diagram showing the switching of the KAT3 in the K3 Owner's manual, am I right in thinking that when transmitting (I am a CW operator), there should not be any RF on the antenna not selected? I use ANT 1 for all my HF antennas, including 6m, and ANT 2 for a resonant inverted vee for 60m that I put up yesterday. The reason I ask the question above is that when I select ANT 2 (for 60m) and transmit, the 1K-FA immediately goes into STANDBY mode because of a high SWR. I am wondering if my KAT3 ATU is working properly? With the KAT3 in BYPASS mode (which is how I have been using it for all my HF antennas), the K3 SWR meter gives an SWR of 1:1 on 60m, which it should do as the antenna is resonant. When I switch the ATU to the AUTO position on 60m with the same antenna and then tap the ATU TUNE button, the K3 makes a similar noise to the K2 ATU I have, but does not display any readings. When I then transmit, the SWR meter shows maximum SWR and about 40 watts output with the K3 power contrtol set to 100 watts. I have tested the KAT3 relays using the L1-L8 and C1-C8 and Ct settings in the KAT3 CONFIG menu and they appear to be working ok. This is the first time I have needed to use the KAT3 ATU or the ANT 1/ANT 2 facility since I got the K3. I would appreciate any advice or suggestions, please. Thanks and 73 de Chris, G4BUE _______________________________________________ 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
