This small collection started at a village hall market in the Cotswolds. I don’t recall exactly how I heard about it - I think my wife spotted it in the local paper. The vendor had quite a selection of 20’s and 30’s components plus a couple of interesting looking old sets. The poor chap seemed to be pretty fed-up with being there and I ended up buying his entire stall (for quite a modest sum)! Amazingly all the valves still have intact filaments.

I have found references to the DE3 and DE6 but this one is clearly marked DE5. I gather that DE stands for "Dull emitter". Maybe someone out there has some more information.

Rather a handsome triode with a nickel base and a 3-volt filament. I assume that BTH stands for British Thomson Houston.

I can’t find any reference to the ST22 anywhere so I suspect it may be rather special. The B4 base is made of beautifully figured "walnut" bakelite and the box purports to be hand-initialled by the great man himself! Presumably the 1920’s version of seed packets signed by Allan Titchmarsh!