Hi Tony, As Don indicates, you have two choices for what antenna input the sub rx is connected to when you built it.
"The Sub receiver's antenna can be connected to the ATU or to the auxiliary RF input. When you install your Sub receiver you must chose an antenna configuration and then physically connect a TMP cable inside the K3S from the Sub receiver's J92 antenna input to one of two places. First, you can connect the receiver to the K3S ATU, which allows the Sub receiver to share the same antenna the Main receiver is using (ANT 1, ANT 2, or RX ANT IN). You may also choose to have the Sub receiver use whichever antenna the Main receiver is NOT using (ANT 2 if Main is using ANT 1, or vice versa). You must set CONFIG:KRX3 Ant=Atu for this option. This may be your best choice for all around operating with a variety of antennas. The second choice is to connect the receiver to a separate auxiliary RF BNC antenna connector. In this case, the Sub receiver can share an antenna with the Main or it can use a different antenna connected to the AUX RF BNC. Set CONFIG:KRX3 Ant=bnc if you choose this option. This may be your best choice for diversity receiver operation with specialized receive antennas. A factory assembled K3S with KRX3 Sub receiver is delivered with its antenna connected to the AUX RF BNC (CONFIG:KRX3 Ant=bnc). Changing to KRX3 Ant=Atu will require you to open the K3S case and move a TMP cable from the BNC to the ATU. Refer to your KRX3 assembly manual for detailed instructions." With your antennas both being potential transmit antennas, I would recommend the first option. Cheers, Fred KE7X For info on all KE7X Elecraft books, see www.ke7x.com. ________________________________ From: [email protected] <[email protected]> on behalf of Don Wilhelm <[email protected]> Sent: Friday, November 24, 2017 12:54 PM To: Tony G6GLP; [email protected] Subject: Re: [Elecraft] Diversity / aux RX problem Tony, Where is your subRX antenna AUX input connected? To the BNC jack below the 2 SO-239s or to the non-transmit antenna? Once you know that, use BSET to changel the subRX input to AUX If you do not know which antenna connector is connected to the SubRX AUX input, you can find out physically by removing the top cover and following the TMP cable. If it is connected to the KAT3 then it is the non-transmit antenna, but if connected to the BNC jack, then that is the jack that is connected. You might be able to determine it without removing the top cover - just set the subRX to use the AUX input and plug the antenna into each jack one at a time. When you hear band noise or signals, that is the one connected. 73, Don W3FPR On 11/24/2017 12:37 PM, Tony G6GLP wrote: > Hi Guys, > > I built my K3 a couple of years ago complete with second RX. Until now I > have only used the ANT 1 and ANT 2 inputs but thought I would try some > diversity. Having an inv L mainly set for top band and 40m dipole I > thought I might move the 40m dipole to the RX AUX port and listen to the > diversity system. > > Now no matter how I play / switch things the RX AUX port sound is dead. > I know the antenna is good because I can plug it into the unused ANT > port and rx on both the INV L and dipole with slightly different > reception. putting the set into diversity holding the SUB button for a > couple of sec shows diversity and the rx goes stereo in the headphones. > What I dont get is the sub channel audio no matter what I do with the RX > ANT switch. Just for completeness I can rx two things one on vfo A and > another on vfo B in contests etc. > ______________________________________________________________ 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]
