I have a KPA/KAT500 combo connected to my Flex 6600 and K3. The K3 has all of the cables connected, so when it’s on, it controls the package with full integration. I use the “key interupter” to break out the key line. It’s “Y’d” with the key line from the Flex as Jim mentions into the KAT500. I switch input coaxes via a two port manual selector. That could be automated using one of several options if desired.
Works great. tnx Mike / W5JR Alpharetta GA > On Mar 17, 2019, at 4:53 PM, Jim Brown <j...@audiosystemsgroup.com> wrote: > >> On 3/17/2019 1:26 PM, Charlie Wirth wrote: >> Other than disconnecting the send and control cables from the 1500 that go >> to the Flex and plugging in the same cables from the 7700 is there any other >> way to have both sets of cables connected to the amplifier safely? > > Several thoughts. First, both of Elecraft's power amps nearly instantaneously > detect the frequency of the drive signal, no there is no need for the rig to > send band information to the amp. Second, ALC should never be used to set TX > power -- that should always be done by setting the output power of the rig. > > The only necessary connections are the "amp key" line that puts the amp in > transmit mode and the coax between the rig and the amp input. Switching the > coax is easy with a SPDT coax switch or relay. > > Most of the rigs I've owned use a short on the key line to key the amp. If > both of yours do that, you can probably connect them in parallel to the Key > input of the power amp using an RCA Y-cable. I've done that for years to > switch my K3 between my KPA500 and a 1500w tube amp (for many years a Ten Tec > Titan, now an 87A). > > 73, Jim K9YC > > ______________________________________________________________ > 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 ______________________________________________________________ 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
