17 Jul
2007
17 Jul
'07
12:29 p.m.
Subject: Re: 1966 Mag: Build NE-2 Neon Bulb Computer - scan available
From: woodelf <bfranchuk at jetnet.ab.ca>
Date: Tue, 17 Jul 2007 12:22:41 -0600
To: General Discussion: On-Topic and Off-Topic Posts <cctalk at
classiccmp.org>
Bob Bradlee wrote:
A dial comes from an old phone, check a thrift.
The NE-2s are still very available from most decent electronic
parts suppliers.
The trick to age NE-2s is run them at 50% over rated for a week
(at lest 40 hours) and they will stabilize nicely.
If you need to grade/match the aged NE-2s a 500hz relaxation osc
and a scope will allow viewing the upper (fire voltage) and lower
(extinguish) voltage as well as sensitivity to light very quickly.
Hint, light should be incandecsent or the osc will try to sync
on the flourescent flicker.
Allison
And never dialing Zero!
otherwise an operator error will occure :)
Drat... I can't get all the parts.
:)
Where do you get a telephone dial now days ... If I got the
phone with a dial it would work better than the $10 one I have.
The neon bulbs may be hard to find , the ones now days have
a built in resistor.