[Elecraft] K3 / P3 with SteppIR

I have a K3 / P3 / SteppIR SDA100. Everything is set to 38400 baud. I have connected a Y-cable to the RS232 connection on the K3. One side of the Y is connected to the SteppIR controller with a null modem inserted (as directed by SteppIR instructions). The other side is connected to the XCV

Re: [Elecraft] K3 / P3 with SteppIR

I suspect that the problem is that you have two transmitters on the RS232 circuit. Maybe you can find some help in this similar situation. David K0LUM On Apr 2, 2014, at 3:52 PM, Larry Gerhardstein

Re: [Elecraft] K3 / P3 with SteppIR

David, that probably is it. My Y-device shows ohm meter continuity on all 9 pins. For the required isolation, at least one pin should show open. Larry W7IN On 4/2/2014 21:26, David Christ wrote: I suspect that the problem is that you have two transmitters on the RS232 circuit. Maybe you ca

Re: [Elecraft] K3 / P3 with SteppIR

Hi Larry, One leg of the Y cable attaches to the SDA100. The other leg of the Y cable attaches to the PC connection on the back of the P3. Then the separate RS232 cable supplied with the P3 goes between the XCVR connection on the P3 and the RS232 connection on the K3. 73, Mike K2MK Larry Gerha

Re: [Elecraft] K3 / P3 with SteppIR

I solved the problem by removing pin 2 from one side of the null modem between the K3 and SDA100. Now turning the K3 frequency tuning knob results in correct frequency display on both P3 and SteppIR controller. The pin was easily removed with a pair of needle nose pliers. I can now get on to

Re: [Elecraft] K3 / P3 with SteppIR

Also, when a P3 is communicating with the K3, the RS-232 Y connection cable to the Steppir and computer should be used at the P3 computer connector, not at the K3. That will hide the internal P3-K3 data comms form the steppir controller. Eric elecraft.com On 4/2/2014 2:50 PM, Larry Gerhardstei