Padded envelope? They would never survive my mail carrier.
On Nov 27, 5:35 pm, Dan Foster danfoster3...@gmail.com wrote:
$1.25 per tube, any quantity. Shipping is a USPS padded flat rate envelope.
$5.30 inside US, $12.95 to Canada or Mexico, and $16.95 to any other country.
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And if you want something truly bizarre and high-voltage, there are
devices like the ITS1A, which uses 50V, 100V, and -300V supplies, but
the segments are directly controllable with TTL logic!
Any ideas on where to buy these tubes? Very cool. Bet I can't afford 'em
anyway.
Vitaly might
Not that I'm biased (!), but if you are able to roll your own, you can
see two nice designs employing circle graphics at Grahame's
sitehttp://www.sgitheach.org.uk/scope2.html and
at Oscilloclock.com . These are based on David's original design at
cathodecorner.com .
There are many other
On Wednesday, 28 November 2012 15:39:43 UTC, Oscilloclock wrote:
Not that I'm biased (!), but if you are able to roll your own, you can
see two nice designs employing circle graphics at Grahame's
sitehttp://www.sgitheach.org.uk/scope2.html and
at Oscilloclock.com . These are based on
Here's the checker schematic.
http://threeneurons.files.wordpress.com/2012/11/crt_tstr.gif
It uses 2 MC34063 chips. One for the HV, and the other for the 6V heater.
10 signals go to the CRT tube.
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neonixie-l
On 12-11-28 02:59 PM, threeneurons wrote:
Here's the checker schematic.
http://threeneurons.files.wordpress.com/2012/11/crt_tstr.gif
It uses 2 MC34063 chips. One for the HV, and the other for the 6V
heater. 10 signals go to the CRT tube.
A lot of the old scope circuits used to run the
Just out of interest, is the IN-9 brighter than the IN-13? IN-9 requires
10mA current for full bar and IN-13 4mA. Wondering where the extra 6mA goes
to, heat or light?
Michel
On Tuesday, November 27, 2012 5:41:16 AM UTC+11, Dan Foster wrote:
Hello,
I have a few (10) IN-9 Bargraph tubes
I found this at radiomuseum.org:
quote
At this point, I should clarify the difference between the IN-9 and the
IN-13
The IN-13 takes up to 5mA for a 12cm orange glow from Neon gas, and has
three electrodes. One perforated cylinder as the anode, a central wire
cathode for the glow, and a
My PayPal email is danfoster3...@gmail.com
I'll send it in a box, same shipping cost. Send me an email with your
address, etc.
On Tuesday, November 27, 2012 9:27:30 PM UTC-5, bryan wrote:
I am interested. I'll send the money for 4 tubes and shipping in USA this
Friday and as soon as you
Thanks for the info Adam. It doesn't really explain why the current is
higher / sensitivity is lower for the IN-9. I still expect the IN9 to be
brighter as the higher current should ionize more neon. Maybe I should
measure it one day.
Michel
On Thursday, November 29, 2012 8:25:31 AM
Michel - that's exactly what happens. IN-9 tubes are significantly brighter
than IN-13, and to my eyes much better for general use. I made this thing (
http://youtu.be/mQ1567EFCY0) with IN-13 and both flavours of IN9. Although
the IN-13 were bigger, used less current and were more predictable to
That is an interesting display Jon, thanks for the info and link! How do you
make the step down animation? Did you post a schematic somewhere of this
clock? The sleeping sickness is probably related to the part of the tube
that is not lit? I mean, in your clock setup this wouldn't really be an
I think I know how to do the step-down animation, you probably switch anode
and cathode in an H-bridge style circuit. Anyway, I think the tubes are
really interesting so I bought myself a bunch on ebay. Amazing how cheap
they actually are!! Even a complete clock with 4 7-segment displays cost
only
Glad you liked it - was my first venture into designing my own clocks. I
haven't posted a schematic, but there isn't really much to it in hardware.
The tubes are driven by single transistor voltage-controlled current sinks
which are run by an octal DAC controlled by a PIC. The rest is just HV
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