Having made requests of Elecraft at the end of last year for a "eot only when transverting" from the k3 with no success, I developed the "eot only when xverting" circuit as part of my auto switching transverter interface written up at http://g4fre.com/k3vhf.pdf. It will also appear in the proceedings of the Central States VHF Society Conference happening next weekend
Dave WW2R ------------------------------ Message: 8 Date: Sun, 12 Jul 2009 10:18:42 -0700 (PDT) From: "Julian, G4ILO" <[email protected]> Subject: [Elecraft] KEYOUT PTT only when transverter band selected To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset=us-ascii I don't have a linear amplifier. I do have a transverter, and I use the KEY OUT jack to put it into TX. Trouble is, it puts the transverter into TX whatever band I'm using. For LO stability reasons (not to mention that I can never remember to switch the transverter off when I'm not using it) I'd prefer to be able to leave the transverter switched on but only receive a PTT signal when the VHF band is selected. I think that means I'd need a circuit that combines the state of DIGOUT0 with KEYOUT-LP, such that it grounds the transverter PTT input when DIGOUT0 is 0V and KEYOUT-LP is grounded. Has anyone made something like that? ______________________________________________________________ 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
