a friend gave me a old B-50 MRF455 stinger amp that goes in the speaker slot. just trying to figure out the wiring for this before I start to try to install it. I will not be able to put a picture up until my son comes over this week with his camera phone. I do not have a digital camera. this amp has 2 relay's in it. a place for 6 wires for the hookup. I have the ground, in and out feed for the RF feeds. there is 2 places some one scratched a + sign on them so figure it has 2 places for power in. not sure if it is for full power on to each spot or not.. both traces go to each individual relay. was thinking maybe one is for a preamp for RX. then I have one purple wire that feeds to a opposite side of one relay that feeds power to the MRF455 final. I have searched the web and so far have not found this board any where to try to compare it too. it would have been made in about the later 80's or early 90's before the RM ad203 came out. I have tried to compare it to the galaxy and ranger final boards before they went to mosfets and no luck if any one remembers this board and has any suggestion's to the wire hookups it would help me a lot to figure it out. I have a couple superstar 120 FM and a couple superstar 121 radios I was thinking of trying it in.. I will poet a picture as soon as I can.