Hi,
I don't believe the Z700U is doped. Its performance in the dark is
brought about by the priming electrode that keeps a good amount of
ionised atoms in the device so when the cathode-trigger gap is pulsed it
breaks down readily and reliably. I've not had any problems with the
Z700U in complete darkness whereas the XC18 trigger tube I tried to use
before that was a doped tube and was pretty useless in the dark. It
required light to keep operation reliable. I did try an experiment with
a Z700U with the priming electrode unlit and it then didn't trigger
reliably in the dark.
As for the price of a set of PCBs for a clock, it very dependant on the
number of people showing interest. Counting you, it make just two people
at the moment so I doubt if the price will be very good.
Grahame
On 21/04/2017 20:45, Tidak Ada wrote:
No problems with the half life time of the doping of the ZM800U ? I can remeber
somebody here in Netherlands who needed to check the ZM700U tubes in these,
before he could make a well working clock.
What will those trigger tube prints cost?
eric
-----Oorspronkelijk bericht-----
Van: 'Grahame' via neonixie-l [mailto:[email protected]]
Verzonden: vrijdag 21 april 2017 13:40
Aan: [email protected]
Onderwerp: [neonixie-l] Trigger Tube Clock
Hi All
Here's two pictures of a nixie/trigger tube clock built by Massimo Capra in
Barcelona. Still to have a clear acrylic cover fitted over.
Details are here:
http://www.sgitheach.org.uk/nixie8.html
I have run out of PCBs but could be convinced to get some more manufactured if
there was sufficient interest - please PM me and I'll gauge interest. It is
unlikely I'll do any kits again. The design uses a custom wound mains
transformer that is not hard to have made. The Z700U trigger tubes are
available in their thousands from a UK supplier.
Note that the Z700U has a priming electrode so it doesn't have problems
operating in complete darkness.
Enjoy
Grahame
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