Hi 'LIVEWIRE?'
Yes I do remember at the time i was a little worried and it was only a short test say maybe no more than about six minuites so I must have been lucky. It was really to establish that the radio was still working after a few small repairs, and also whilst I was waiting to obtain a decent UY41 raplacement valve, as the original had cracked at the base where the glass pip is on the side.
The radio was not used again until the replacement UY41valve arrived. I wouldn't have passed the radio on to anyone else with an incorrect part fitted anyway and I still have the radio now in working order.
I hope I haven't given any misleading impressions in relation to the two different types of valve, that was not my intention, I can see now that the UY42 is the lower rated valve, thank you for pointing it out
Paul