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Keith956 · 17th May 2021, 10:00 pm

I think the very first edition of Practical Electronics back in 1964 had an article called the 'Electronic Didjeridoo' - a ring modulator made of a couple of AF transformers and 4 diodes. With a voice signal and 50Hz for the other input it was 'dalek' like!

17th May 2021, 10:00 pm	#2
Keith956 Heptode Join Date: Jun 2019 Location: Oxfordshire Posts: 738	Re: Dalek voice circuit I think the very first edition of Practical Electronics back in 1964 had an article called the 'Electronic Didjeridoo' - a ring modulator made of a couple of AF transformers and 4 diodes. With a voice signal and 50Hz for the other input it was 'dalek' like!