Vacuum tube noise source

Sep 19, 2016 22 Replies

The florescent lamp gave it a broader bandwidth. It had to wipe out VHF AM communications.

Never piss off an Engineer! They don't get mad. They don't get even. They go for over unity! ;-)

That makes sense (depending on the frequency.) PMT's give ~10ns pulses, ~ few ns edges ? (Probably spendier than the gas tube.)

George H.

Some of the jammers transmitted random microwave pulses, and the PMT was used to make those trigger pulses; it wasn't broadband noise. I use to buy the surplus random pulser modules, a shoe-box sized chassis, from Fair Radio Sales, to get the 931A. The whole thing was $5 or something like that.

John Larkin Highland Technology, Inc lunatic fringe electronics

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