> First off how do people usually drive this signal? I assume > its usually taken off of a serial port... I've tried a few > RTTY apps and I've gotten them all to work via AFSK and all > seem to have their pros/cons.
The most common way, and compatible with most loggers and RTTY software, is to drive the K3 FSK and PTT lines on the AUX connecter from a serial COM port on the PC. All that's needed is a level shifter from the PC RS-232 to the K3 TTL. Use a 1-2Kohm base resistor and an NPN switching transistor in the FSK and PTT lines. A diagram of this (except for the K3 AUX connector pins which is in the K3 manual) can be found many places, including www.rttycontesting.com. > I have a feeling in the end that I'll probably most use MMTTY > being that it has a very nice interface into N1MM (unless > there is another application that has a nice interface into > N1MM that I should be aware of). In the recent RTTY Contesting Survey just completed, 75% of the respondents use MMTTY. Look no further. It is beautifully integrated with N1MM Logger. > Finally my last question is that if this comes off of a UART > how has the timing been for people? I remember a while back > I used a UART to to CW keying in N1MM. I remember being > embarrassed by the CW that was sent and I've since bought a > K1EL WKUSB kit and put that together... Very happy with that > little box. Would I have these same timing issues in this > FSK_IN setup? If there was ever a stupid thing is trying to > use Windows as an RTOS. ;) Timing is perfect. I've never heard of a problem, especially because of the UART in the PC. Ed - W0YK ----------------------------------------------- Ed Muns Muns Vineyard - www.munsvineyard.com FaceBook - www.facebook.com/munsvineyard ______________________________________________________________ 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
