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DTF104B

DTF104B

Description

LOT OF 10 PCS
RCA NUMITRON TUBES DTF104B
These tubes have been clean and all segments tested
Push on connector pins are attached
They make a great retro clock project
You are purchasing one lot of ten pieces with pins

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LRS 8-Segment Digital NIXIE Display –Model 156

From eBay

This auction is for a small rack-mount module for displaying a digital count made by LRS.  It’s been tested and functions fine.  All NIXIE tubes work and it starts out at 0 when powered on.  It receives input via a special connector in the back, but the internal circuitry is fairly simple, so it could be modified with minimal difficulty.  I know these are sometime converted to digital clocks and it would be particularly simple for this module.

This was previously used in particle physics to count particle event.

The digital counter in the pictures is what you will be receiving.   If you have any questions, please ask and I will do my best to answer them.  Good luck.

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Baird Atomic Geiger GM counter

Baird Atomic Geiger GM counter

Baird Atomic Geiger GM counter

From eBay

Rare GM tube counter and HV power supply from Baird Atomic.  Powers up and counts as expected in Test mode.  I do not have a GM tube so I am unable to verify the actual counting function.  HV power supply is adjustable and works.  Includes 5 nixie era dekatron counting tubes.  For those unfamiliar with these tubes, they were at one time the state of the art in digital counting.  The five tubes in this unit are connected as decade counters so that as the one on the right counts (the neon point moves in a circle) and hits 0, the next tube to the left receives a count pulse and it moves one place around the circle.  The third picture shows the counting in progress though the slow camera shutter speed makes the first digit counter look like more than one point is lit, only one is lit at a time.

Cosmetically this unit is an 8-9.  Some old writing is still visible on the top of the cabinet.  Otherwise, it looks great.

When bought this a few years ago my thought was to maybe extract the dekatron tubes and associated counting circuitry and do something else with it.  Time never allowed this and I really don't have the heart to take this great working instrument apart.  If you have a GM tube and want a great way to use it and display the counts in a vintage way, this is it.

Weights about 25 pounds.  No manual.


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The Vintage Technology Association has a unique item up for auction - a huge planar-neon Babcock SP-431 display.  Do Want!

From the auction

Babcock SP-431 Sperry-style 4-digit Panaplex display, new in original foam tray. The SP-431 is one of the largest Panaplex displays ever constructed, with an impressive 2" digit height. Display measures 9"x3.25", 1" leads. This is an extremely rare display, and would be perfect for a large clock project.

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Babcock SP-431

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