Hi Bob,

Thats a good idea and I've already been down that track. I've had a
professional repair person look at the switches. As I understand it
the contacts in the switches have deteriorated with time and some have
broken. For example there are three interlocking switches on the
front allowing you to select from one of four inputs, (all switches
out is one input). The switch for input two is broken and I think the
switch for input four has recently gone as well. I've been told of
another Cotter owner who had similar problems.

So its really a case of finding some replacement switches, or finding
an enthusiast who could rebuild the amp, probably in a new chassis, or
the old chassis with a new front plate to accommodate any changes to
the swithces.

Thanks