FR-114A/U vacuum tube Nixie frequency counter - $300 (santa cruz)

FR-114A/U vacuum tube Nixie frequency counter 1

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condition: like new

make / manufacturer: Sentinel Electronics

model name / number: FR-114A/U

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Rare Nixie display frequency counter which uses Trochotron beam-switch counters.
It's a 1MHz max counter with 6 Nixie digits.

Uses 6703 trochotron counters to drive the 6844 Nixie indicator tubes. It has a 100 kHz time base. There's some good info on this counter on the web. Search google for "FR-114U – Digital Frequency Meter"

This counter is in almost mint condition and was never used. Complete with the original manual, and, assuming I can find them, quite a few spares including some beam-switch counters.

Cash and pickup in the Santa Cruz mountains.

post id: 7849777254

posted: 2025-05-12 19:25

updated: 2025-09-05 11:48

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FR-114A/U vacuum tube Nixie frequency counter - electronics - by...

Rare Nixie display frequency counter which uses Trochotron beam-switch counters. It's a 1MHz max counter with 6 Nixie digits. Uses 6703 trochotron counters to drive the 6844 Nixie indicator tubes....