if i remember right the problem for putting a mike jack on one was the way the cover goes on and off. its been 30 years since i had one. the 123 i had had a turner +3 hardwired on it. one time on an old courier i seen the mike had a plug mounted outside of radio so mike could hook up but was not a standard mike plug. where there is a will there is a way. also i dont think a 4 pronged plug wont work seems like it takes 5 or 6 wires for the mike to work. 73s midnight special
The black and the white face Johnson's were the first radios I talked on....they were my brothers....he had D-104s hooked up to them....be careful wiring up a mic to a tube radio.....they bite.
if i remember right the problem for putting a mike jack on one was the way the cover goes on and off. its been 30 years since i had one. the 123 i had had a turner +3 hardwired on it. one time on an old courier i seen the mike had a plug mounted outside of radio so mike could hook up but was not a standard mike plug. where there is a will there is a way. also i dont think a 4 pronged plug wont work seems like it takes 5 or 6 wires for the mike to work. 73s midnight special