Dave wrote:
Howdy...I am interested in building a cheap and easy band decoder for
an icom 706mkIIg that will ultimately be used for switching relays on a
remote antenna switch. I have searched around and found a few people
that make them and offer kits, but would like to see if anyone has
built one with good results. Any help or ideas would greatly be
appreciated...

Too bad it's not an IC-745 which has an analog voltage output
proportional to the pre-WARC ham bands.

I designed such a device about ten years ago. It works on any
100 watt transmitter. It had a divide by 1024 pre-scalar to
bring the signals down to a comfortable speed for CMOS logic.
Then a window would open for ~4mS and a 2048 max counter would
record the counts. Those bits were stored and used as address
bits on an EPROM whose output indicated the band. I used it to
automatically switch in variable lengths of ladder-line depending
upon the band.

I wonder how many people would be interested in me digging
up that old design which is buried in a box in my garage?
--
73, Cecil http://www.qsl.net/w5dxp