Run them for awhile. Sometimes with old tubes it takes awhile to fire all
cathodes and clear surface deposits. Use higher voltage to get them to fire
and then back down to just run for awhile. I had some old IN-8-2 with fine
grids that took about 2 days before they would light properly and now they are
fine. 1967 tubes...
Jeff
-------- Original message --------
From: Robert L <[email protected]>
Date: 6/7/17 1:48 PM (GMT-06:00)
To: neonixie-l <[email protected]>
Subject: [neonixie-l] Re: Well I tried, big tubes on ebay this am
OK... Tubes just arrived in good condition from USPS, mixed results testing
them... But both tubes have multiple working digits.
Crack in the glass on tube 10 does not go all the way through... Not too
surprising as the glass is about 3 mm thick! the better part of 2 mm glass
intact.
Tube 9: working digits: 1, 2, 7, 8, 9, 0Tube 10: working digits: 1, 2, 3, 4, 7,
8, 9, 0
Not bad! Would have loved one tube with a complete set of digits, but no
complaint!
Suggestions on applications with this limited set of digits? A clock displaying
12:37 all day long and right twice a day? A restricted output random number
generator? Ideas???
B
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