G'day, > I'm using an indoor wire antenna for all bands except 30m, where I'm testing a > home built mag loop. The wire antenna is connected to ant #1, the mag loop to > ant #2. The mag loop is resonant and doesn't use the ATU, while the wire > antenna needs the ATU.
> Now each time, I change to 30m, I do have to disable the ATU manually by > switching it into CALS mode, which is very inconvenient. Alternatively, I can > connect a dummy load, tune the ATU into the dummy load on 30m, and then > reconnect the mag loop. The problem with this second approach is that after > accidently tapping tune, I will have to repeat the whole process (disconnect > antenna, connect the dummy load, ...). > > Since the given setup (having a resonant antenna and another one that needs > the ATU) seems pretty common to me, I do assume that there is a simpler > solution. Is it possible to disable the ATU for one of both antenna > connectors, or for a specific band? Any other trick to make changing bands > simpler? Can't see the problem. I have a log periodic for 18-30MHz on ant-1 and a vertical for lower bands on ant-2. It does not matter if the atu stays in circuit and "tunes" the matched resonant antenna. Just the same as matching to the dummy load. My vertical is a good 50 ohm match on 10MHz but I also very occasionally press it into service on 7MHz where the ATU keeps the PA happy. Regards, Mike VP8NO _______________________________________________ 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
