Here is what Mike says...

'Mid 60's Bush TR82C Radio fitted with a Ruby based mini amp circuit. This a truly portable, great looking, great sounding little guitar practice amp. Powered by 9v battery power or external 9v centre negative mains supply and features volume and tone using the original thumb wheel controls. This has been kept to look as original as possible with only the addition of a power indicator LED next to the On/Off switch. Your guitar plugs in at the back of the Radio where the aerial socket once lived so it will amaze your friends when you plug in and create beautiful music. What's on the Radio man.. oh, its you..'