At 3/5/2007 11:05 AM, you wrote: >What kind of remote base controller did you use to remotely control the >Kenwood TR-7950?
Homebrew. A DTMF "#" would, for 4 seconds, logically connect the DTMF decoder to a "2 of 8" line interface, which directly connected to the 8 input lines of the 16 button keypad on the TR-7950. So to switch to 146.61 (-), one would simply send DTMF "#6610". The 7950 was one of the first radios to incorporate auto-offset, which really came in handy for this application. Still, one could change the offset by sending one or two "A"s, as I believe that was the offset toggle key. Only thing missing was CTCSS. Back in the day when this thing was built, a few repeaters around here on 440 were still carrier access. So if CTCSS was needed, the repeater was put into carrier & the user encoded whatever tone was needed for 2 meters. TX audio went straight to the modulator to keep the CTCSS from being clipped or filtered. Simple but effective. Nowdays it would still make a great frequency-agile remote base for monitoring or simplex use. Bob NO6B
