1 wsscott 5 months ago I have a Variety Plus amp that I purchased new about 1966, and its still running great. Original tubes still. My nephew is interested in guitars and amps now and I wanted to see if I could find an Owner's Manual for this amp that explains what the controls do, ie. like the difference in the inputs and the gain switch, etc. I know most of it is basic and I've just been using the same settings so long, I don't remember its potential. Any help you can give is appreciated. Thanks.