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Testing a strobe tube ?

 
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gilles(at)elixir-aircraft
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PostPosted: Tue Feb 04, 2020 3:26 am    Post subject: Testing a strobe tube ? Reply with quote

Hi all,

Due to illness, one buddy is selling some hardware.
What would be a simple way to test a Whelen strobe tube he bought some
time ago ?

No strobe power supply available, unfortunately..

Thanks for any input.

--
Best regards,
Gilles
http://contrails.free.fr
http://lapierre.skunkworks.free.fr


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nuckolls.bob(at)aeroelect
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PostPosted: Tue Feb 04, 2020 8:50 am    Post subject: Testing a strobe tube ? Reply with quote

At 05:24 AM 2/4/2020, you wrote:
Quote:
--> AeroElectric-List message posted by: Gilles Thesee <gilles(at)elixir-aircraft.com>

Hi all,

Due to illness, one buddy is selling some hardware.
What would be a simple way to test a Whelen strobe tube he bought some time ago ?

No strobe power supply available, unfortunately..

Thanks for any input.

Used, new old stock? How does the
tube look? Any signs of darkening
glass at the electrodes within
the tube?

These are simply xenon filled tubes
and have a VERY long shelf life.
Unless there are obvious signs of
usage, odds are that the tube
is fine.



Bob . . .


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gilles(at)elixir-aircraft
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PostPosted: Tue Feb 04, 2020 9:34 am    Post subject: Testing a strobe tube ? Reply with quote

Le 04/02/2020 à 17:44, Robert L. Nuckolls, III a écrit :

Quote:

  Used, new old stock? How does the
  tube look? Any signs of darkening
  glass at the electrodes within
  the tube?
[...]
  Unless there are obvious signs of
  usage, odds are that the tube
  is fine.



Hi Bob,
Thank you for responding.
Actually - I believe - new old stock.
Did not see the tube myself, however here is a link to the link he - actually his wife - put on the Web :

 https://www.leboncoin.fr/sports_hobbies/1724492264.htm
Thanks again,
--
Best regards,
Gilles
http://contrails.free.fr
http://lapierre.skunkworks.free.fr


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echristley(at)att.net
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PostPosted: Tue Feb 04, 2020 10:23 am    Post subject: Testing a strobe tube ? Reply with quote

On Tuesday, February 4, 2020, 6:27:02 AM EST, Gilles Thesee <gilles(at)elixir-aircraft.com> wrote:


What would be a simple way to test a Whelen strobe tube he bought some
time ago ?


You need thousands of volts across the terminals. Do it wrong, and you might not wake up next week. You might be able to hook it into a spark plugs circuit, counting on the coil to limit the power. . .but I wouldn't do that unless I was willing to throw it away.


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nuckolls.bob(at)aeroelect
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PostPosted: Tue Feb 04, 2020 2:53 pm    Post subject: Testing a strobe tube ? Reply with quote

Quote:

You need thousands of volts across the terminals. Do it wrong,
and you might not wake up next week. You might be able to hook
it into a spark plugs circuit, counting on the coil to limit
the power. . .but I wouldn't do that unless I was willing to
throw it away.

Few xenon flash tubes operate at such
voltages . . . those are usually
industrial sources of UV light.

Our a/c strobes, vehicle emergency strobes,
camera strobes operated in the 250 to
400v range. To test them, you need both
a steady source of flash-voltage paralleled
with an energy storage capacity -PLUS- a
much higher (1 to 3 kv) trigger pulse
feed to the trigger electrode. In cameras,
this takes two transformers. One to provide
a 200-400v charge on a capacitor . . .
a second to develop the higher voltage
trigger.

One of the simplest strobe circuits was
used in low-cost, timing lights . . .

[img]cid:.0[/img]

My first one plugged into the wall and
developed about 350 volts on the energy
storage capacitor. The trigger pulse came
from connection to the engine's #1
plug.

There's no really quick/n/dirty way
to test these critters other than to
plug it into a functioning system.

Given that its an out-of-the-box offering,
the risks are low.


Bob . . .


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gilles(at)elixir-aircraft
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PostPosted: Wed Feb 05, 2020 3:16 am    Post subject: Testing a strobe tube ? Reply with quote

Le 04/02/2020 à 23:50, Robert L. Nuckolls, III a écrit :

Quote:

  There's no really quick/n/dirty way
  to test these critters other than to
  plug it into a functioning system.

  Given that its an out-of-the-box offering,
  the risks are low.




Bob and Ernest,
Thank you for answering.
Passing on the info to my buddy's wife.
--
Best regards,
Gilles
http://contrails.free.fr
http://lapierre.skunkworks.free.fr


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