Hi, I've noticed that my pair of scanners often receive strong spurii from my KX3's receiver, in the UHF mil air band. Whilst the spurii can be detected faintly with no cables attached to the KX3, when I attach certain cables, the strength of the spurii increase, most notably the I/Q cable, which causes (what passes for) the S-meter on the scanner to fully deflect. Connecting an antenna to the KX3 doesn't seem to have any effect.
The other day I noticed that my scanner had stopped on a locally used UHF channel that was exactly 100 times the frequency in the 80m band that I was listening to. Today I have noticed that listening on 7.08Mhz SSB, my scanners stop on 389.4Mhz, which seems to be the 55th harmonic of the KX3's dial frequency. This is affecting my AOR-8600mk2 and IC-R20. Unfortunately, I've also been developing a hybrid spectrum sensing scanner (called Onsense), that uses a HackRF to sample the mil air band and tune in my AOR-8600mk2 to the strongest signal detected. I find that I am constantly having to add frequencies to Onsense's blacklist as I tune my KX3. This isn't a good situation to be in. I already have a ferrite on the I/Q cable, but that doesn't help. When I enable the 8kHz shift on the KX3, the previously detected spurii goes away. Whether it goes entirely or not, I don't know, it may just shift to another frequency that isn't being scanned. The RX Isolation filter is enabled. Is anyone else having similar problems? Is this normal for a KX3? Is there anything I might try to mitigate this? Cheers, Darren, G0HWW ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
