You might have a problem when only one rig is powered up, with the unpowered one pulling down the key/control line. The K3 is OK, as both outputs are open drain/collector. If that's also the case with the ICOM, the "Y" connector should work. If the ICOM has a pull-up resistor, or anything except an open drain/collector connected to that control line, there could be a problem.
Scott K9MA On Feb 16, 2011, at 1:29 PM, Fred Serota wrote: > Is there anything about the voltage or current on the keying line that would > prohibit putting the K3's key line in parallel with an ICOM's keying line so > I would not have to switch between the two when sharing an amplifier? > > In other words, could I just use a "Y" connector to connect the two > transceivers to the keying line on my amplifier (Alpha 9500)? > > Thanks in advance, > Fred, K3BHX > ______________________________________________________________ > 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 Scott Ellington Madison, Wisconsin USA ______________________________________________________________ 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
