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. 
17 Jul
17 Jul
10:52 p.m.
On 7/17/07, Allison <ajp166 at bellatlantic.net> wrote:
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.
That sounds like the technique described in the article.
Hint, light should be incandecsent or the osc will try
to sync
on the flourescent flicker.
Interesting - with the U.S. changing to compact flourescents, that
sensitivity could be a problem in the future. One might have to run
NE-2 oscillators in a dark room or perhaps in full sunlight - just not
"reading level" fluorescent light.
-ethan
11:21 p.m.
On 18 Jul 2007 at 0:52, Ethan Dicks wrote:
Interesting - with the U.S. changing to compact
flourescents, that
sensitivity could be a problem in the future. One might have to run
NE-2 oscillators in a dark room or perhaps in full sunlight - just not
"reading level" fluorescent light.
Why not use a small radioactive source? I wonder if some Am-241
cannibalized from an ionization smoke detector might do the trick?
Or perhaps some paint over the bulbs to block light completely...
Cheers,
Chuck
11:04 p.m.
Allison wrote:
A dial comes from an old phone, check a thrift.
The NE-2s are still very available from most decent
electronic
parts suppliers.
Both are figments of your imgination - none around - thrift stores
or decent electronic parts suppliers .
But I did download the PDF so some day in the far future...
Allison
11:12 p.m.
On Jul 18, 2007, at 2:04 AM, woodelf wrote:
Here, dial phones fetch $40-50 at thrift stores nowadays. :-(
-Dave
--
Dave McGuire
Port Charlotte, FL
A dial comes
from an old phone, check a thrift.
The NE-2s are still very available from most
decent electronic
parts suppliers.
Both are figments of your imgination - none around - thrift stores
or decent electronic parts suppliers .
But I did download the PDF so some day in the far future...
6368
days inactive
6369
days old
4 comments
5 participants
participants (5)
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ajp166＠bellatlantic.net -
bfranchuk＠jetnet.ab.ca -
cclist＠sydex.com -
ethan.dicks＠gmail.com -
mcguire＠neurotica.com