Welcome to the K3 world Jim. I have used the one transistor interface from the MMTTY "help files" built into a "D" plug. It uses 1 x NPN transistor (any small signal one will do), 2 x resistors and 2 x diodes. I no longer use the MMTTY program but recall not needing a PTT connection, only the FSK one (from memory the PTT can be done via serial cable, the normal one used for used for programming and logging between the PC and the K3). I have a multi serial card in my PC so there is no shortage of proper serial connections.
I no longer use MMTTY, but use Ham Radio Deluxe for sound card data modes and that program only needs the serial cable and 2 x 3.5mm stereo cables between sound card and K3 (the audio input on the K3 is "mono" but the stereo cables work just fine). Above all else, there is no need to rush out buying interfaces... 73 Dave, G4AON K3/100 #80 ----------------- I have a K3 on it's way form Aptos that will arrive Tuesday, Sept 8th.....would have here today except for a minor hiccup. But, not complaining....just a lesson in patience. I've been worrying over the assembly and operating manual the last few days. I like to contest using FSK RTTY. Looks like the only way to get the FSK from the computer to the radio is through the Accessory port on the radio. Looks like there are several other functions that go through the connector. The manual seems a little shy on how to gather all the data from apparently several locations and get it into the connector. Is there a cable available to do that or is one left to their own to fabricate such a spiderweb thing. I applaud the built in interface isolation transformers only to find myself faced with having to engineer and build a break out cable that connects among several pieces of hardware. Do I have this thing all wrong or do I need to start contemplating building a breakout cable? Thanks for any help. Have a good day and 73. Jim, W0EM ______________________________________________________________ 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
