HP 521D Nixie Tube Frequency Counter

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Mac Doktor

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Apr 24, 2023, 3:00:42 PM4/24/23
to neonixie-l
In keeping with the recent discussion of early counters with thermometer displays, here's a similar item for collectors who prefer actual Nixie tubes:



Terry Bowman, KA4HJH
"The Mac Doctor"


"If only you could see what I've seen with your eyes."—Roy Batty, Blade Runner

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