M1225 Pin 13?

[kb0nly]

I got some M1225's that i am working on, they were originally setup as a back to back repeater i guess, anyway, i got the wiring off the accessory connectors figured out except for one pin.

On the TX radio they had a wire coming off pin 13, SW A+ SENSE, but i don't know what it was connected to. Just curious, what is this wire used for??

Pin 10 is the ignition sense, got that figured out, but what about 13?

[Al]

Pin 13 is a low current switched A+, just like it says....I've used it to power low current devices like preamps. +13.8V when the front panel switch is in on position, and 0V when it's off.
I don't recall the exact maximum current available, but I seem to think it's around .5 amp max.

[jackhackett]

I'd have to check to be sure, but I believe that is A+ controlled by the on/off switch. You can use it to power another device, such as a tone remote panel, or it can trigger the ignition sense on the other radio in a repeater so they both turn on from one switch. There's a limit on the current you can draw, I think it's 1 amp.


edit: you type faster than me Al ;) I can check the manual in the morning for the correct current limit.

[kb0nly]

Ok, thanks guys. That's all i needed to know, now i know why it was being used previously, it was powering the controller that used this pair of radios as a repeater originally.

[jackhackett]

Looked it up, .5 amps it is. I was thinking of the CDM radio which lists max current on pin 13 as 1A.