> I haven't been too active lately, but I read the digest every day. Although
> I am starting to thin out my collection, I ran across a fun piece today - a
> Hivac 425A2 made for Otis Elevator. Octal base, but only six pins. It
> appears to be a touch sensitive neon switch like some other par
Much obliged, Martin! 2040 was the number I couldn't think of. Besides
the date code, there is a paper sticker with a number (72 I think but the
tube is at my shop). I will try it out and post results/photos soon!
Mike
On Saturday, September 28, 2013 4:34:10 PM UTC-4, Dekatron42 wrote:
>
> I
It is similar to QT1257 by EEV which you can find a datasheet for here:
http://frank.pocnet.net/sheets/084/q/QT1257.pdf and the Sylvania / CETRON
2040 tube, a similar tube was manufactured by Cerberus, called GK11, which
you can find data on here: http://frank.pocnet.net/sheets/174/g/GK11.pdf.
That sounds quite interesting, could you upload here few images maybe?
On Saturday, 28 September 2013 20:37:40 UTC+1, mjrippe wrote:
>
> Greetings folks,
>
> I haven't been too active lately, but I read the digest every day.
> Although I am starting to thin out my collection, I ran across a fun
Greetings folks,
I haven't been too active lately, but I read the digest every day.
Although I am starting to thin out my collection, I ran across a fun piece
today - a Hivac 425A2 made for Otis Elevator. Octal base, but only six
pins. It appears to be a touch sensitive neon switch like some
