While channel mods are nothing new on the HH45 they leave much unpublished. For 120 channels, 40 above and 40 below the regular US 40 channels, solder a bridge across "A" (note, there are no special button sequence to access the expanded channels, they are selected by pressing up/down buttons until you go above ch.40 or below ch.1. For EU/CEPT, 80 channels, solder bridges across both "A" and "B" (note ch.1-40 are same as US channels, channels 41-80 are below US ch.1) For UK 27/81, 40 channels with pecular 1.25khz offest, 27.60125-27.99125Mhz, solder bridge across "B". In both EU/CEPT and UK mode, an "FM" icon will display on some or all the channels. THIS MOD DOES NOT MAKE THE RADIO TRANSMIT OR RECEIVE FREQUENCY MODULATION, it just makes "FM" icon display on the LCD. After modification the processor must be reset, simply short C506, a pair of tweezers or piece of wire work nicely for this. thanks to Defpom for the picture of PCB and for having the 120 ch mod first.