Jim, I do not have enough information for a good answer, but I can ask a question -- What are the voltage levels you are applying to the ACC pin 1? It must be 0 volts and +5 volts - there is a pullup resistor in the K3, so you only need an open collector transistor to accomplish the keying from an RS-232 signal. The TTL voltage must be referenced to ground (ACC pin 5 or pin 12).
What do you mean by "bypassing the MicroKeyer 2" - what is driving the ACC connector pin 1 (and K3 ground). I am not familiar enough with the Microkeyer 2 to understand its connection options. If you are applying raw RS-232 levels to ACC pin 1, you may have damaged the TTL input and/or the pullup resistor. The K3 Utility uses an entirely different path to create RTTY (or PSK31) from ASCII input through the RS-232 connector, so there is not a 1 to 1 correlation between the K3 Utility method and the FSK input to the ACC connector. 73, Don W3FPR On 10/24/2010 7:57 PM, Jim Spears wrote: > I am trying to get my K3 operational on rtty and have run aground. Receive > works fine. Transmit using FSK-D mode in the K3 keys the transmitter but > the FSK signal does not trigger the K3 to transmit both tones. I hear a > single tone in the monitor and the P3 also shows the same thing. > > > > Using the K3 utility to send rtty works fine but this is a different > interface, bypassing the MicroKeyer 2. > > > > So the big question is "what am I doing wrong?" I have posted this to the > MicroHam Yahoo group, it will be interesting to see where the best advice > comes from. > > > > Details of the hardware and software configuration are available on request. > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
