If two entirely different rigs pull paddle inputs up to different voltages (say 5 and 12V), and with the paddle lines tied together, current may flow from one rig to the other when the paddle is not pressed. A turned-off rig might float or might pull down a paddle input. I'd measure the current flow in the various scenarios (one or the other rig on/off, paddle inputs not grounded). A few diodes might remove potential problems.
If two rigs are turned on (for whatever reason), would you want them both keyed? I'd personally favor a switch, and consider microphone, PTT footswitch, keying lines with that same switch. But that's possibly a lot more complex than you need. I bought an NCS-3240 Multi-Switcher some years back but haven't pressed it into use. It switches microphone and key line, but assumes an external keyer rather than one built into the radio. I personally found it less work and more flexible to use different paddles and different microphones. 73 de Dick, K6KR -----Original Message----- From: elecraft-boun...@mailman.qth.net <elecraft-boun...@mailman.qth.net> On Behalf Of Jim Rhodes Sent: Sunday, March 11, 2018 09:51 To: Doug Hensley <w...@hotmail.com> Cc: Elecraft List <elecraft@mailman.qth.net> Subject: Re: [Elecraft] OT: CW Paddle A/B switch A question. Do you really need a switch? Are both rigs going to be on at the same time? If not a simple headphone splitter should do the trick. Jim Rhodes K0XU On Mar 11, 2018 9:52 AM, "Doug Hensley" <w...@hotmail.com> wrote: > I have two radios and one cw paddle. I'm looking for a small inline > A/B switch as would be used on stereo headphone sets to switch between > sources. The whole thing would be a "Y" cable with two 1/8" male > stereo plugs on one end and a single female jack on the other. > Switching would choose which male plug is active. Yes I can build one > but before I reinvent the wheel, I thought someone might have a source. > > I'm tired of plugging and unplugging and I don't want or have the > extra space for another paddle. > > Has anyone found such a switch? > > Reply by private email please as this is off topic. > > Thanks, > > Doug W5JV > > > > > > > ______________________________________________________________ > 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 > jimk...@gmail.com > ______________________________________________________________ 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 d...@elecraft.com ______________________________________________________________ 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