What I have done:
I replaced the original speaker, with a quality Sony speaker and fitted a new 20W Bluetooth amplifier.
I've left the original valve radio in good (almost) complete condition - but please note this model only function as a bluetooth speaker, not a radio. The genuine light bulb lights up, when you switch the radio on.
The radio now operates on 12V (low voltage) with an external power supply and is adapted to work in any country.
£169 with 12V power supply and built in power pack
£149 with 12V power supply
Voltage: 12V with power supply (included)
Weight: 3 kg