I investigated this when I was exploring repairs for my HP 141T A2V1 ZZ1000 voltage reference glow tube. Illuminating an NE-2 reduced the strike time much more than the strike voltage. I tried several lamps and all did the same.
Illuminating the VR tube did neither enough to be useful. I replaced it with a TL431/zener combo, see https://groups.io/g/HP-Agilent-Keysight-equipment/album?id=68333
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of Chuck Harris <firstname.lastname@example.org>
Sent: Wednesday, January 23, 2019 7:07 PM
Subject: Re: [TekScopes] Tektronix Neon Light replacement parts?
I shouldn't think it would be all that difficult
to test the strike voltage in various ambient lighting
conditions, both with and without the blue led...
Harvey White wrote:
On Thu, 24 Jan 2019 01:09:54 +0000 (UTC), you wrote:
What about plain NE-2's and 1 or more blue led's shining on it?Not sure what this would do for accuracy of strike voltage. Ought to
lower it, though. No idea if it would stay constant, either.
(have a power strip with the usual flickering neons, UV light or blue
light and they go on....)
Leon Robinson K5JLR
Political Correctness is a Political Disease.
Politicians and Diapers should be changed
often and for the same reasons.
On Wednesday, January 23, 2019, 6:30:01 PM CST, Dan Cordova via Groups.Io <email@example.com> wrote:
Thank you for your prompt reply!
I found the lamps on the schematic and ordered some.
Once these are installed, the curve tracer should be back in working order. I found three paper caps that were bad and replaced them.
Speaking of radiation- I have a EG&G KN-2 tube that has Ni-63. It is a radioactive isotope of nickel, half life of 101 years, emits beta particles (when functioning). It was used for triggering a laser.
I'm retired from Sandia National Laboratories after 30+ years, don't glow at night, and haven't suffered any ill effects (yet) from soldering with Sn/Pb solder.
Thanks again for the info.
On Wednesday, January 23, 2019, 4:06:54 PM PST, David Holland <firstname.lastname@example.org> wrote:
They appear to be NE-23's.... Eg: NE2's + Radioactive gas (that's no
longer radioactive by now) :-)
I'd probably just go with bog standard A1A's, as I don't believe
they're particularly critical (though I did not look).
But if you want a little more radiation in your life, and be more
correct I gather they're called 5AB's now.
(No, I don't think there's any radiation danger, though I don't
recommend huffing a 5AB... :-P )
On Wed, Jan 23, 2019 at 4:08 PM Dan Cordova via Groups.Io
Hello- while replacing bad capacitors on my Tektronix 575 Curve Tracer, I literally touched a couple of the neon lights and broke the leads.
Is there a replacement part the group can recommend?
The neon lights are useful to show at a glance that the circuit has power, but can the lights be replaced with a wire, or would I need to put a resistor in place?