You can find a PDF-file on the IN-9 & IN-13, from a Russian book, with the
original Russian and a translation made with Google Translate
here: https://drive.google.com/open?id=0B2XLFMydwkBgc2lhSEk5WXgxLXc in the
TEMP folder here at the forum.
In most designs that I've seen in Russian books the
With DC high voltage power supply, the plasma didn't anchor to the bottom.
With 50Hz square wave pulse current, the tube worked correctly.
https://youtu.be/mwD-WWELFqY
Hi guys,
I would like to contribute a few points to the discussion.
In contrast to the IN-13, the IN-9 does not have an auxiliary cathode to
anker the glow discharge. This we all know.
However it does have a zirconium bump/spike at the bottom of the main
cathode which is otherwise made out of
Wow, thank you, for that analysis ! I guess the short answer, is change the
current slowly, in particular, from the OFF to ON. Slow being a few
milliseconds, since these thing tend to strike in the few 10s of
microseconds. Maybe, a bit longer for those bargraphs.
On Monday, February 11, 2013
Also, anyone thinking of audio VU meters, check out the MSGEQ7 chip if you
have not already, i have a dozen or so from this seller
: http://www.ebay.co.uk/itm/270847592314 (not related) and used some in a
work project (audio - DMX) and they worked wonders, nice stable DC level
out for reading
Here is a link to the first VU-meter that I came across several years ago:
http://m.bareille.free.fr/vu-in13/vumeter_in13.htm#vu4301 ,I built a few of
the ones with the That2252 IC. It works very well and unlike other
people here on the forum I never had any problems with either IN-9 and
IN-13
