Stu: I think the problem with a PTT "OR" function is that the XCOM has a
built-in VOX intercom and I'd imagine that you'd have the wrong MIC input
for a co-pilot TX. You could turn the intercom feature OFF and use a
separate external intercom for the dual pilot / co-pilot feature. The other
issue with the remote button is that a single button does both the memory
select and the flip-flop function depending upon which mode the display is
in ... you'd still have to change hands on the cyclic to press the MODE
button on the radio ... not very user friendly for our application. Perhaps
you could talk to XCOM and get them to finally recognize the usefullness of
separate select and flip-flop buttons for a helicopter cyclic and other
applications. I know they are pin limited, but this would be more useful
than an external switch for intercom on/off or pilot isolate (pins 5 & 11).

I still do the occasional governor but the difficulty is the parts source
.... I'll send more details via direct email.

"Stuart & Kathryn Fields" wrote in message
.. .
Bill: Thanks for the reply. It seems like it might be possible to do a
wire OR between the pilot and co-pilot PTT switches.
Microaire has provided me with a replacement unit so I will be trying
that.
However, my patience with this unit is getting very thin. I will have to
modify my instrument panel if I go to the ICOM.
BTW are you still producing governors? We get calls from various people
regarding governors and tend to send them your way.
Spurlings was great.