Thanks to pinout info from Joe, W4TV, and Kent, K9ZTV, the K3 can now be fairly easily mated up to the Yaesu Quadra HF Amp. Joe provided the main set of pinouts and Kent offered up the key info for getting the Quadra to go into auto-TUNE mode to allow its ATU to operate when the K3 was Keyed.
K9ZTV is now Field testing the configuration, but so far, things look very good, and appear to be stable with respect to ALC control of the K3 drive power. We're still working on getting the Quadra's ALC output voltage level to that precise setting which will allow the K3 to be run at a drive level lower than about 80W yet still adequately drive and control the Quadra. The ALC works nicely, but we'd still like to be able to use about 40W of drive so the ALC doesn't have to work nearly as hard to control the drive. I believe we will find the 'sweet spot', but it will probably be a combination of the K3's EXT ALC setting and the ALC SET value from the Quadra. If you would like to see a PDF of the current interconnection illustration, please drop me an e-mail and I'll send the file to you... can't send PDFs through the reflector... sorry. 73, Tom Hammond N0SS ______________________________________________________________ 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
