Old Midland CB # 79-892 question.

Hi all. I have an old Midland CB model 79-892. I lost the original power inlet plug. Can anyone please tell me which are the correct positive and negative pins? I do not want to hook it up wrong. Thank you in advance. Jim

Here’s a link to the schematic. Maybe that will help.


I have the schematic but it does not specify what the pin polarity is.

actually it does specify…follow the lines and you can see which pin is negative (ground) and which pin is positive and feeds thru the power on switch pins.
you can verify that with a meter. With the power switch in the off position, the negative pin will read to case ground. The positive pin will not.