The Radio Information Board

I've got several UHF Johnson radios that I think (not certain) are called "Challenger Series" The only tag on them gives a number of ATH90f2427171. On the back of the radio is a two prong power plug and an SO239 antenna jack. There's also a rubber plug in the heat sink and an external spea...

I'm looking for someone who can answer my questions about the following repeater: Uniden Model MRS-802/890/A/B/C It appears to be a desktop repeater with a local or repeat option. There is an SO-239 and an "N" connector and a BNC connector on the back of the unit. It appears as though ther...