A Kay Sound Fashion 50L guitar amp packed up and, as I couldn't find any useful information I set about tracing out the circuit in order to repair it.
The resulting circuit diagram is available as a download in the links section ->
The Kay 50L in all its glory.
The amp chassis carries the PCB (held in place by potentiometer locknuts), output transistors, transformer, smoothing cap and output cap.
The mains transformer has the recifier diodes on a tagboard and a fuse mounted on another, it looks like both have been changed at some time.
The PCB component side.
The PCB Track side.
The Speaker with a 6 inch rule for scale.
And it's working again.
You can contact me at :- 
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My circuit tracing as a gif image. (19.7kB),
tracing this out (and drawing in Micro$oft Paint) took longer than the repair!
My scribbled dissection notes. (236.3kB),
transistor numbering on the PCB sketch matches the above circuit diagram.
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