Ever seen this?

[SWISSNIXIE - Jonathan F.]

Found this by accident
https://www.ebay.com/itm/Old-vintage-NOS-NU-IDPI-144-Made-in-USA-radio-antique-apparatus-vacuum-tube/263659229862

Look at the white top, kind a looks like a neon bulb coating (flourecent), but why would a neon buldb have so many pins?

Could that be a small crt tube like the NIMO ones?

[Charles MacDonald]

Very small CRT - will try to attach descripion

--
Charles MacDonald Stittsville Ontario
cm...@zeusprune.ca Just Beyond the Fringe
No Microsoft Products were used in sending this e-mail.

[threeneurons]

1DP1 1 inch CRT. Its a ONE, not an "I" (eye) as the first character.

Standard CRT numbering system, where the first numeral, is the rough diameter, in inches, the 3rd character, is always a "P", and the number after the "P", is the phosphor type. P1 is green. P4 would be white.

I have a 1CP1, and a 1EP1 in my tube stash.

More data, on the tube in the eBay listing:

https://www.radiomuseum.org/tubes/tube_1dp1.html

http://tubedata.milbert.com/sheets/084/1/1DP1.pdf

[John Rehwinkel]

I have a 1CP1, and a 1EP1 in my tube stash.

I have those, as well as a 1FP1, and a 1DP11.

Here's a pic of some of my small CRTs (1DP1 is top row center, with a Nimo tube to the right of it, and an XM1000 to the right of that):

http://www.vitriol.com/images/tech/tubes/crts1.jpg

- John

[David Forbes]

I made a little tiny scope clock with this CRT back in 2001. 

http://www.cathodecorner.com/sc60.html

I have collected a few dozen of these tubes, if anyone's interested in this gizmo.

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[petehand]

I'd like one. Those would be a drop-in replacement for the 3LO1 in my clock - just a bit smaller.

[Oscilloclock]

David, out of curiosity did you ever get around to making the finished product mentioned on the page?

- Aaron