Hi Pete,
If the open circuit (unkeyed) voltage is the same polarity for both devices, you can connect a diode in series with each keying line. Then connect both diodes to the KEY OUT (not PTT !) jack. The voltages do not need to be identical , just the polarity 73 Frank W3LPL ----- Original Message ----- From: "N4ZR" <[email protected]> To: [email protected] Sent: Thursday, November 7, 2019 4:44:41 PM Subject: [Elecraft] Adding PTT Out Switching to a K3 I need to be able to disconnect the antenna to my SDRs when transmitting. This used to be easy but now my PTT Out jack is committed to the KPA-1500. I'm looking for suggestions of how best to accomplish this - I don't believe sequencing is required, just a second PTT output. Ideas? 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>, now spotting RTTY activity worldwide. For spots, please use your favorite "retail" DX cluster. On 11/7/2019 9:30 AM, Ray Albers wrote: > ….thanks to comments and suggestions from K9ZTV and W2CS. > > My K3 has the Sub Receiver installed, and I have been playing around with > diversity reception, using a random wire connected to the sub-receiver > antenna input BNC connector. Apparently the carrier operated relay that > protects the receiver from overload is being triggered by lots of RF coming > into that random wire. When I disconnect the receive antenna, no more > clicking. Now that I know what it is, I'll just ignore it. Or maybe someday > I'll rig a manual T-R switch arrangement to disconnect the sub receiver > antenna except when actually using it. > > Thanks, gents! > > 73 > Ray K2HYD > ______________________________________________________________ > 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] ______________________________________________________________ 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]
