I figured out what was going on here... I'm assuming that the carrier sense relay is only on the new KAT3A?, and in this case, it helped me solve an RFI issue in my shack. I was powering a receive antenna pre-amp and a 10mhz reference signal distribution box with the same PS as I was using for the K3S. Not a great idea where both devices in this case had outputs (obviously) back into the K3S. i.e. the RX antenna input and the K3EXREF input from my 10mhz reference. Sigh... it has been a long day gyrating around with things... removed all the ground connections to everything and as luck would have it... the light finally turned on with the PS powering the two boxes mentioned above.
Max NG7M On Sat, Feb 11, 2017 at 3:23 PM, M. George <m.matthew.geo...@gmail.com> wrote: > I'm pulling my hair out on this one... all morning trying to do my due > diligence. > > I picked up a used K3S which is like new... I got a great deal. Anyway, I > verified with Elecraft that this K3S was factory assembled and there were > not any field upgrades installed based on the verification of the original > invoice with Elecraft. All the goodies with the factory build are > installed. > > The first thing I did when I got it was to reset all the settings back to > defaults and then take the time to go through setting everything up again > and running through all the calibrations etc... It would have bugged me to > not know how everything was setup, plus I have done this many times over > the years with K3 kit builds etc... > > My (new to me K3S) has the KRX3 installed and everything is working as > expected, except that I'm hearing the carrier-operated relay come on when > keying CW into a dummy load on ANT1. I have verified that the KAT3A which > is installed to is not setup to send any RF input to the KRX3, but the > standard build is in place with the AUX RF BNC connector is connected > directly to the back of the KRX3 input. > > I don't have a receive antenna hooked up to the AUX RF connector and in > fact I have put a dummy load on it just to be sure there shouldn't be any > funky RF getting into the KRX3. > > I setup the CONFIG KRX3 setting to Ant=bnc and I have powered off the > radio and back on etc... but I still get the problem with the > carrier-operated relay coming on. There is some info in the manual about > an issue with VCO CAL needing to be run again if you have this issue, but I > don't believe VCO CAL applies for the K3S with the new synth boards. > > I have a solid dummy load connected to ANT1 and I just can't see what > would be causing the carrier-operated relay to start to switch on as > increase power to the +12 watts point where the KPA3A kicks in. I can > start to hear the relay to start switching around 20 watts plus as already > mentioned. > > Hmmmm, any thoughts... hope someone made it this far into the post. I > hope I'm not having an RTFM or STFI moment here and missing something > obvious. > > Max NG7M > > -- > M. George > -- M. George ______________________________________________________________ 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
