Looking at the odd Nixie tubes and a not very bright bulb but cool nevertheless!
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The mentioned astable multivibrator made from delay relays :-
I’m trying to track down some NC and NO’s so I can make the above circuit for a museum display too!± if you have any you are interested with parting with please get in touch and we can strike a deal!
more info on the museum of everything else :-
#microphone #Electronics #DIY