19-09-2021, 01:56 PM
(18-09-2021, 02:54 PM)ppppenguin Wrote: A resistor is cheap and simple but gets hot. A buck transformer is a better solution for dropping 20V or so. A tiny 10VA transformer will suffice to buck 20V for up to a 120W load.Yes, it depends on the load (30W vs 60W set) and the supply voltage (230V here vs 240 to 245V in UK). I'd certainly normally use a 20V transformer in the UK and check AC Polarity to avoid having 260V! Here I've been able to use 3W resistors on some German sets. The Battery/Mains sets seem to use more marginal transformers than the larger mains only sets. One mains set with an EL95 o/p was marginal; maybe a compact Opus LW-MW-SW-VHF set.
