Hmm... I don't remember the NL- types, sorry.
But I know that I saw that on RTS-11 type tubes.
And especially the CK1916 and the CK1923.
Dieter
----- Original Message -----
From: Nick
To: [email protected]
Sent: Monday, April 09, 2012 12:42 PM
Subject: Re: [neonixie-l] Re: Nixie Clock vs Raytheon CK1916 tubes
Interesting - Have you seen this with NL840-class tubes?
Nick
On Monday, 9 April 2012 11:11:55 UTC+1, Nocrotec wrote:
It's a well known problem with the 1916's.
I have about 500 NIB, and most of them show that problem.
Most need a high firing voltage (200 V and up) and some are completely dead.
The only thing I can imagine is gas leakage.
I have experienced that problem on some other American made tubes, but oddly
ONLY at American made tubes (I recall National and Raytheon).
Dieter
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