This is off-topic, but... I picked up a 25F at a hamfest last week and I would like to know if there are any "must check/fix" items that must be attended to prior to firing up the unit. Also, does anyone know of a reasonably priced source for Collins FA series filters for the 75S-3B/C receivers? I need an AM filter. Thanks and 73, Alan Johnson N4LUS/7