I have a flashtube (Novatron 2000/2001/2060, 500J 800V), but I don't know
the polarity .

Would you help me, is there any polarity of this tube, if there is which one
is cathode ??

I have two pictures of it :
http://www.kolumbus.fi/ari.n/valokuvat/flashtube01.jpg
http://www.kolumbus.fi/ari.n/valokuvat/flashtube02.jpg


Best Regards, Ari Nousiainen

"Arska" wrote in message
...
I have a flashtube (Novatron 2000/2001/2060, 500J 800V), but I don't know
the polarity .

Would you help me, is there any polarity of this tube, if there is which
one
is cathode ??

I have two pictures of it :
http://www.kolumbus.fi/ari.n/valokuvat/flashtube01.jpg
http://www.kolumbus.fi/ari.n/valokuvat/flashtube02.jpg


Best Regards, Ari Nousiainen



When I played with these things some years ago, making disco strobe lights,
and car timing strobe lights, I don't recall there being any polarity
issues. Just a tube with two internal electrodes, an external striking
electrode, and some xenon gas, as far as I'm aware.

There is a huge amount of useful material available on the net, including a
large site from Sam Goldwasser, who regularly posts on here. Just Google for
" Xenon flash tubes "

Arfa

"Arska" writes:

I have a flashtube (Novatron 2000/2001/2060, 500J 800V), but I don't know
the polarity .

Would you help me, is there any polarity of this tube, if there is which one
is cathode ??

I have two pictures of it :
http://www.kolumbus.fi/ari.n/valokuvat/flashtube01.jpg
http://www.kolumbus.fi/ari.n/valokuvat/flashtube02.jpg

I can't see any differences between the electrodes, can you?

* Any red markings or "+" markings indicate the anode.

* With no markings but electrodes of unequal size, the larger one is the
cathode.

* If both ends look identical but the trigger electrode is closer to one
electrode, or more coupled to one electrode, then that electrode is the
cathode.

* If the tube looks symmetric except for having a getter at only one end,
it is probably preferable to make the getter end the cathode, especially
if any getter material exists on the electrode itself. Any vaporized
getter metal forms positive ions easily, and will be attracted to the
cathode. Metal vapor released around the anode is more likely to condense
all over the tube and discolor it.

* If both ends of the flashtube look alike except for one electrode being
shinier and with rounded edges, then the shiny electrode with rounded
edges is the anode, and the steel-gray (tungsten) sharply cylindrical
one is the cathode.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.

"Arfa Daily" writes:

"Arska" wrote in message
...
I have a flashtube (Novatron 2000/2001/2060, 500J 800V), but I don't know
the polarity .

Would you help me, is there any polarity of this tube, if there is which
one
is cathode ??

I have two pictures of it :
http://www.kolumbus.fi/ari.n/valokuvat/flashtube01.jpg
http://www.kolumbus.fi/ari.n/valokuvat/flashtube02.jpg


Best Regards, Ari Nousiainen



When I played with these things some years ago, making disco strobe lights,
and car timing strobe lights, I don't recall there being any polarity
issues. Just a tube with two internal electrodes, an external striking
electrode, and some xenon gas, as far as I'm aware.

There is a huge amount of useful material available on the net, including a
large site from Sam Goldwasser, who regularly posts on here. Just Google for
" Xenon flash tubes "

With some, it makes a big difference. See my other post, or the Strobe
FAQ at the sites below.

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.

"Arska" wrote in message
...
I have a flashtube (Novatron 2000/2001/2060, 500J 800V), but I don't know
the polarity .

Would you help me, is there any polarity of this tube, if there is which
one
is cathode ??

I have two pictures of it :
http://www.kolumbus.fi/ari.n/valokuvat/flashtube01.jpg
http://www.kolumbus.fi/ari.n/valokuvat/flashtube02.jpg


Best Regards, Ari Nousiainen



http://www.repairfaq.org/REPAIR/F_st...ml#STRBFAQ_026

Dave