:I just watched a show called Pawn Stars and someone tried to sell a geiger counter. The store owner said they couldn't test it because it needed 90v and 22.5v battery packs that were no longer available. Doesn't someone make reproductions of these or couldn't they have hooked up like 10 transistor radio batteries for the 90v and some other combination for the 22.5?
You could but they would not last very long. Modern 9v batteries were not designed to supply high current vacuum tubes.
Jon.
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