A&A Engineering made a board/circuit to do just what you describe. A friend owned and used one and it worked just great. Somewhere I've got the docs on it... but check with A&A via their web site.
Hamtronics DTMF Decoder could be expanded to do the same function. cheers, s. > Bob Dengler <[EMAIL PROTECTED]> wrote: > > 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 >
