Did you check the crystals to see if the correct ones are in the correct sockets? Jim > Seeking advise 75S-1 out frequency calibration..band > switch position at 3.6 yet receiving 3.8 to 4 mc. This > same condition exists on other band swich postions. > Though before I do something foolish would check with > you'all. > All help appreciated....K2HDU....Ken