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sticky switches on old transponder

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dick ripper

Member
Joined
Jun 18, 2009
Messages
23
Location
Lakeland, Florida, USA
The push button switches on my old ARC (Aircraft Radio & Control), a division of Cessna, RT-859A p/n 42260 102P are sticking and sometimes inoperative. The transponder has 6 square pushbuttons arranged ID-ALT-TEST on top row with ON-STBY-OFF
on bottom. (BTW, code switches are rotating lever type and working well).

It has been so long since used that possibly the switches need some cleaning attention <G>. 1st question is what cleaner to use on contact surfaces?

Looking into the switch mechanism itself (beyond the pushbuttons); it appears that ON and OFF toggle back and forth while STBY should push inwards and hold with another push releasing the standby thereby resulting in ON, STBY & OFF in "neutral". Not sure in that logically STBY would leave ower on...

Sorry for poor description but don't have a manual to state how switches are to work. ie: push,toggle,interlocks,etc...
Question2 is how does any other pushbutton transponder's swtiches work ?

Thanks, Dick
 
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