Have you tought about the possibility to combine two of the SO-239 connectors to form a balanced input. With some relays it is possible to change the configuration in such a way that say selecting Antenna 1 is SO-239 connector 1, selecting Antenna 2 is SO-239 connector 2, selecting Antenna 3 is SO-239 connector 3, selecting Antenna 4 is SO-239 connector 2 senter conductor and SO-239 connector 3 senter conductor with a balun switched in to the circuit by some relais to make the combined inputs of SO-239 connector 2 senter conductor and SO-239 connector 3 senter conductor a balanced input. It is of coarse not possible to use SO-239 connector 2 and SO-239 connector 3 as unbalanced (coaxial) antenna inputs at the same time as the antenna 4 configuration is used, so due to this the control firmware should be set up in such a way that when Antenna 4 is NOT enabled, the following selections are available: Ant 1, Ant 2 and Ant 3, and when Antenna 4 IS enabled, the following selections are available: Ant 1 and Ant 4. I think that something like this would give the users a great flexibility. Martin Storli LA8OKA Oslo, Norway ARCTICPEAK's Radio pages! http://www.arcticpeak.com/radio.htm
________________________________ Fra: Wayne Burdick <[email protected]> Til: Elecraft Reflector <[email protected]> Kopi: [email protected] Sendt: Torsdag, 8. desember 2011 2.22 Emne: [Elecraft] KAT500 update We originally had two antenna jacks on the KAT500, with one of them switchable between balanced and unbalanced. Recently we decided that a third antenna jack would provide greater utility overall. (In my case, I'll be keeping a dummy load on the third jack.) All three jacks will be unbalanced (SO239). We're hoping to add a high-power, high-performance balun to our product line sometime next year that will serve the needs of those using balanced lines. 73, Wayne N6KR ______________________________________________________________ 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 ______________________________________________________________ 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
