Tom, the antenna tuner can be bypassed.  The radio is about 11 by 6 by 3 
inches.  The control head has a 10 foot cable connecting it to the radio. 
They sell extention cables for the mike and key.  Everything runs from the 
head which has a desk or mobile mounting stand.  It depends on your batery 
and alternator in the motor home, if you have the power.  For a mobile set 
up, with the narrow band width of the antenna, I could see having the tuner. 
It's still limited in range, but good enough to handle the changes across a 
band.  The neat thing is that although the radio is very small, since you 
can stick it anywhere, all you need is a place for the head.