If you have an early KX3, you probably need KX3BNCMDKT, a new BNC connector assembly with some inline filtering.
See: http://www.elecraft.com/order_form_parts.htm -- Phil On Tue, Jun 24, 2014 at 3:00 PM, Darren Long <[email protected]> wrote: > 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:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
