Thank you to all that replied. Turns out it was simple. Aux synth cable unplugged from sub rx input. Didn't see it first time because it hides under the 2m module. Glad I try to always look for simplest stuff first.
Curt KU8L On Tue, Nov 4, 2025, 12:31 PM Curt KU8L <[email protected]> wrote: > Good Morning Folks > I have finally added a couple of K3 to the contest station lineup here > and just coming up to speed on how to use them. Had a K2 for a while > but big difference! > > K3 100W, KAT3, 2m Module, Kiob, ser 00872 MCU vers 5.62 Has original > Synths and Sub rcvr . > > Problem is no signal thru SUB. It appears to be working because I hear > normal background noise which comes up with RF gain and audio prperly > splits to right and left headset channels. > > I went thru getting my head around the options for SUB antenna sources > and after deciding I definitely wanted to use the MAIN shared option I > opened the unit to check how the SUB aux antenna was connected. Removed > the TMP jumper to the KAT3. > > Set config to ANT=BNC, pwr cycled, and selected BSET RX ANT is set to > MAIN. My understanding is this should share the main ANT1 or ANT2 > selection of the main rx with the SUB. > > All else looks to be in order inside but still no Signal from SUB. > > Before I remove the 2mtr unit and lift the SUB out to be sure the SUBIN > connections are OK looking for any other things to check. This was a kit > build but had sat unused for a couple years after owner went SK. Clean > and looks good inside but no idea if it ever worked > > Final thought was to try replacing the TMP connect to SUB Aux and KAT3 > and reconfig for using the non tx ant to verify the SUB operation and > perhaps narrow the field to looking at the SUBIN connect and the Jumper > W4 situation. > > Any ideas on where to go next with this? > > Thank you in advance for any advice. > > Curt > KU8L > > > > -- > This email has been checked for viruses by Avast antivirus software. > www.avast.com > ______________________________________________________________ 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]
