[Trlog] Icom 706MKIIG interface for TR

[John Unger]

I am trying to put together an interface for a IC706 to use with TR. I 
would like to be able to use one serial port for both the frequency read 
out and keying. I am trying to use the serial port voltages to power the 
transistors in the frequency read out part of the interface.

The interface works FB without the serial port being set up for keying in 
the logcfg.dat file. However, when the serial port keying is enabled in TR 
it appears as if all the pins with voltage on the serial port connector are 
pulled low, and the net effect is that the frequency read out only works 
when sending CW!

I've tried using pin 7 (9-pin connector) with PTT disabled in TR, but the 
voltage there still seems to disappear.

Has anyone gotten both functions to work from a single serial port, or 
should I just give up and use the parallel port for keying?

tnx es 73 - John, W4AU