Thanks Dave and Scott,
Hadn't thought about making a circuit to come direct off the TX line of the mic, that would be easier in some ways and certainly safer in respect of not pulling any other parts of the radio out of allignment.
I'll have to have a play around I think and see what happens... usually my best ideas come when I'm tinkering...lol (but maybe I'll experiment on an old rig first)
When I've done it I'll post my results.UPDATE:
After many hours of trolling the web I can not find a suitable transistor flip flop design, all the diagrams either require 2 switching inputs (which I thought would be perfect, until I remembered that the Lincoln doesn't have an RX wire in the mic plug
) or flip flop automatically which is no good, or just use a transistor to switch a relay...
Can anyone suggest a transistor flip flop design that for example, with no action lights a green led, then when a switch is pressed and held turns off the green LED and lights a red LED, reverting to green when the switch is released. I know this is possible but just how to do it escapes my brain at present UPDATE:
I have decided to make things very simple and just use DPST minature relay to do the job... ok so its crude, but will work perfectly!