there is a seller on eBay from France with a whole garden shed full of Styrofoam boxes of B-7971 nixies. He puts them up whenever he feels like it. He does take great photos of them but I could never afford his prices.
Pharma Phil
---------- Original Message ----------
From: Terry Kennedy <[email protected]>
Date: April 3, 2020 at 3:13 PM
On Friday, April 3, 2020 at 11:12:14 AM UTC-4, M1 wrote:I have seen a premade Styrofoam case that held many tubes on ebay before.
From the foam trays I've seen (for example: https://www.glaver.org/transient/b7971tray.jpg ) they were simple carriers that the repair techs used to bring tubes to sites with the displays installed. One theory is that Ultronic changed the tubes out before failure, due to the consequences of displaying incorrect information. Or maybe they were replaced only when they failed, but given that we have been operating these tubes in clocks for longer than the LECTRASCAN system was in use, without tube failures, I don't think that is likely, given the amount of wear and tear seen on these trays.
Burroughs likely had some other customers for these, since they did sell a few of the other alphanumeric types. But given the rarity of those compared to 7971's, I think it is safe to say that the vast majority of production went into LECTRASCAN displays.
The "antenna" style 7971 is the older type, and was used to set the height of the display inside the envelope. Quite a long time ago (it may have even been in the Yahoo group) I posted a survey of date codes, branding, and fabrication type (antenna or not, steep or shallow underscore, rivets or not, etc. A number of people added to it.--
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