SWTPC Digi-Vista Nixie Clock
swtpc6800 at comcast.net
Sat Sep 10 23:07:11 CDT 2005
> I would have updated the high voltage power supply to a simple
> transistor regulator. I have about 128 AC around here and that
> can really give over voltage on 115 V transformers.
> PS. Where do you find a 300 V transformer ... I may build one
> some day. Also any options for a ALARM feature? Say a analog
> bird chipring sound?
I wanted to build an exact copy of what was in the magazines. I found all of
the parts, some were slightly different. The MJE3055 power transistor came
in a TO-127 package, The MJE3055T is now more common but comes in a TO-220
package. I made the board for the TO-220 package. (The TO-127 style cost me
$15 the last time I needed one.)
I got the Stancor PS-8416 (250 VCT) power transformer on eBay, two of them
cost me about $25 including shipping. The seller, solderfume, has more for
sale now, see eBay item 5807358404.
I ordered boards for 3 units.
I work with a guy who is restoring a 1957 Ford Panel truck that he got from
his late uncle. This is a 3 or 4 year project. He doesn't understand why I
restore TV Typewriters, 6800 computers and such. What good are they?
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