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Ogroat t1_j9ygjn9 wrote on February 25, 2023 at 2:17 PM

Reply to comment by croakjob in Ouch by PharaoRamsesII

It’s an amplifier. The “light bulbs” are vacuum tubes - a mid-century technology that has mostly fallen out of favor except for some audio applications.

recumbent_mike t1_j9yq9lx wrote on February 25, 2023 at 3:32 PM

Some RF applications as well.