band Decoder for ICOM radios
Band decoder takes three inputs from ICOM accessory connector: +8V reference, +12V and band
voltage. The output open-emitter transistor key connects to ground the band terminal determined
by band voltage (pin 4 of ACC2 connector).
WARC bands are not separated, 12m decodes as 10m, 17m as 15m, 30m as 40m.
The DC voltage to control is up to 50 V with max current 1.0 A .
PTT, ALC, +13.8 V and GND lines are coming through to control the amplifier.