There are a couple of ways to do it, The KISS method involves a lot of wire so hit up your phone company for some multi-pair trunk cable or office cable You need at least 40 or 50 wires (25 pair) One pair is simply power and ground (you may need more than one ground or use a pair of heaver wires) This runs your call and provides ground. The others are wired up in 4-pair batches, (8 wires) one to each of a 7-segment display An 8 pole 11 throw switch at the operator position allows you to "Dial up" a frequency
Just lay out an 8-segment LED bar, Examples
Off52.525 is the Six meter calling frequency (the point is fixed)
146.52off for 2 mtrs
I'm not sure what the 440.xxx is
I also note that the last digit is either a 5 or off (so one wire is all you need) and the first is off, 1 or 4 so 2 wires works there, makes the switching easier too.
I suspect you figured out the 11th position on the switches, (off)
The high tech way is to send digital data down a wire pair, lots less copper, but lots more that can go wrong
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