I know that some of the group have built clock circuits that would output
a changing frequency to interface with a Nixie frequency counter. I know
that there have been circuits that output current or voltage for analog
meters. What I was thinking of was a clock circuit where the output would
be a
On 4/8/11 11:46 PM, Jon wrote:
Very interesting. Looks like a prototype or even home brew conversion
of a wire ended tube onto a B14 or B12 base. When I saw the RCA box my
immediate reaction was that it was a huge numitron, but of course the
tube itself is unmarked - the box may be unrelated to t
Hi again, and thanks a lot for the replies, but I still have some questions.
I do not really understand how to use an AC voltage supply (the Neon
supply John pointed me to for example, or the inverter circuit David
mentioned) with a tube that has just one electrode. Obviously, I connect
one of
Thanks for the info, it great to see someone with some experience take
a look at what i'm doing and give some advice. I have been debating
exactly how to load the tube. Resistance, or actual tubes. I have a
current limiting resistor on the output, so i will have to remove it
and solder my zero impe
> I do not really understand how to use an AC voltage supply (the Neon supply
> John pointed me to for example, or the inverter circuit David mentioned) with
> a tube that has just one electrode. Obviously, I connect one of the wires to
> the electrode, but what should I do with the second wire?
Hi John,
You could connect it to the hilt, so the person holding it provides a counterpoise to the
capacitively-coupled output. This is likely to give you the best brightness, but there
might be a "zappy" feeling for someone lightly touching the hilt while it's
powered up (there'd be no feel
Hello all,
I have a small follow-up problem with my amperemeter. I have ordered a
lower offset-type, the fossil OP07.
But now my amperemeter has a lot of noise in the range of +-0.1mA. Here
is the schematic:
http://www.jb-electronics.de/tmp/nixie_amperemeter.png
Any ideas?
Best regards,
J
On 4/9/11 3:03 AM, jb-electronics wrote:
Hi again, and thanks a lot for the replies, but I still have some
questions.
I do not really understand how to use an AC voltage supply (the Neon
supply John pointed me to for example, or the inverter circuit David
mentioned) with a tube that has just one
"But a long thin tube requires the volts to go from one end to the other
end. "
Really? See here: http://www.youtube.com/watch?v=3TAWQd7BAtQ
1m is something different, sure.
Best regards,
Jens
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On 11-04-09 02:30 AM, lai...@wcoil.com wrote:
The very popular Zenith Transocienanic short wave radios use a
90 volt battery and draw around 11-20 milliamps. The A battery filament
supply is 9 volts at 50-60 miliamps. Many of the very compact portable
tube radios would use 1.5 or 3 volts for th
I'd concur -- looks like a home-modified or prototype. Uninsulated
wires crossing each other, and blobs of solder at the end of each pin,
perhaps no structural connection between the tube and the base.
On Apr 8, 11:36 pm, lai...@wcoil.com wrote:
> Does anybody know what this tube is?
> This is an
Thanks all for ordering. We should be getting the PCB's in soon and
will start filling orders as soon as everything is pulled together.
We'll keep you all informed of our progress.
Thanks, Jeff for putting some tubes out there in this crazy market!
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You received this message because you are s
| I think you'll find that the winner was Giorgio Basile who's
| a prominent tube collector. His astonishing collection can be
| viewed here:
| http://www.lampes-et-tubes.info/index-e.htm
|
| Great spot though - I hadn't seen that one!
I sold Giorgio a few tubes. Nothing too exotic. I think the ra
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