small valves and RE: OT

Sure.... The reason I looked up the equivalents is that I don't know US valve numbers that well, and they don't tell me that much cabout the valve. The Philips/Mullard numbers are much more useful in that respsect -- the initial 'D' means a 1.5V filament (E would be 6.3V, etc), the other letters give the electrode structure (A = diode, F = signal pentode, K = heptode or octode frequency changer, with the phantom cathode type of design (H would be a hexode or heptode designed for a separate oscillator), L = output pentode, etc...) and the '9' tells me it's a 7 pin miniature base (B7G). Knowing what the valves were gave me a good idea as to the design of the set (that sort of line-up was used in 99% of UK battery sets too), and the possible filament voltages. Sure. My warning, again, was based on the fact that you're likely to get inside the set (but as I said, I am sure you realised the dangers anyhow). My comment was not 'why would you want to listen to that radio' (that is obvious, valve radios are good to listen to), but 'why would you want to listen to sports when there's plenty of hacking to do' ;-) -tony