The Joker was a short lived combination of a 30 watt cathode biased amplifier and a Watkins Copicat. Built around 1963/4 Charlie told me this was the most difficult project he manufactured. The setup also incorporated a microphone on a telescopic stand that extended out of the top (not so on this one) making the amplifier dual purpose, an instrument amplifier and pa system, with an integral tape echo. In all a very tidy all round general purpose combination amplifier. Now a highly prized collectors item. I think the microphone was probably omitted from later versions, but is shown on the publicity brochures at the bottom of the page.
The pictures below were listed on eBay during August of 2011
by The Los Angeles Guitar Shop
Los Angeles Guitar
Shop | Los Angeles' Premier Online Guitar Store
All Credits go to Chris Nelson of L A Guitar Shop for his permission to use the following images.
90 GUINEAS !!!
YOU MUST BE JOKING
In fairness to the new owner, I'll not tell you
how much it sold for.
But I couldn't afford it :-(