Karl,
Have a look for Z700U trigger tubes they have keep alive or priming
electrode and so don't suffer from slow ignition or need a light source.
Langrex have them in stock:
http://www.langrex.co.uk
Datasheet:
https://frank.pocnet.net/sheets/129/z/Z700U.pdf
Following your work with intere
I discovered (or re-discovered) the photosensitive aspect last summer,
and even tried to take advantage of that by building a box which
specifically subjects a ring oscillator to varying light levels as a
modulator. Yes the blue LED wash helps the neons in the rack maintain
a more steady pitch. The
