Hi Byron, The setting for the config menu KRX3 depends on what antenna source (for the second of two antenna choices for the Sub receiver) is physically used. There are two choices for this physical connection that are made when the Sub receiver is installed. You must connect the Sub receiver either to the AUX BNC connector (I believe that is the default connection if the K3S and sub receiver are factory-built) or to the KAT3A antenna tuner. Changing from one to another is a matter of opening up the K3S and changing a TMP coax cable from one place to another. If the Sub is connected to the AUX BNC, then the config KRX3 should be Ant=Aux. If the Sub is connected to the KAT3A, then it should be Ant=Atu. In summary, the setting for KRX3 depends on how it is connected in the hardware. Now what antenna is actually connected? In each case you have two choices. The Sub receiver can share the Main receiver's main antenna or it can use either the AUX BNC or the antenna connected to the KAT3 that the main in not using. To switch between these two choice you hold RX ANT for a couple of seconds and the antenna that is activated is briefly shown in the VFO B area. When sharing the main antenna, you will see MAIN or when using the other antenna, you will see AUX. (And the somewhat confusing part of that is that AUX means either the other antenna on the KAT3 or the AUX BNC, depending on the hardware connection.) So in your case until you get another antenna you need to share the main antenna with the sub receiver. Hold RX ANT until you see MAIN. Cheers and 73, Fred KE7X
Author of: "The Elecraft K3: Design, Configuration and Operation 2nd ed" "The Portable Elecraft KX3 – Going for the Summit with the KX3 and KX3-2M/4M" “The Elecraft KX-Line – The Complete Station” “The Elecraft KPA500 and KAT500 – the K-Line Dream Station” Printed, coil bound copies of these are all available at www.elecraft.com “The Elecraft KXPA100, PX3 and 2M/4M Transverters – Assembling the KX3-Line Station” printed copy available at www.lulu.com and pdf from www.ke7x.com. “The Elecraft K3S and P3 – Getting the Most out from Your High Performance Station”. Plus a book dedicated to the K3S upgrades for the K3 and a 3rd Edition of the K3 book are works in progress. Free guides at ke7x.com KPA500 and KAT500 Quick Set Up Guide http://www.ke7x.com/home/k-line-introduction-and-set-up-guide KAT500 and KXPA500 Tuner Operation http://www.ke7x.com/home/kat500-and-kxpa100-tuners ________________________________________ From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Byron Peebles <n...@arrl.net> Sent: Sunday, October 18, 2015 7:52 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] K3S Config: Sub-Receiver Signal Path without BNC Antenna It's unclear to me what the setting for KRX3 should be. 1. I do have the KRX3A installed. 2. I do NOT have an antenna on the BNC, nor on ANT2.. 3. I have a SINGLE SIGNAL PATH from antenna to K3S on ANT1. When I set KRX3 to KAT3, I believe it changes the sub antenna to K3S ANT2. This follows the description of using a separate "receive antenna path". But since I don't have a second path, I change it back to ANT1. Is this wrong? Is there no reason to have a KRX3A if you don't have a dedicated receive antenna? 73, Byron ______________________________________________________________ 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 fc...@montana.edu ______________________________________________________________ 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
