I thought I would share this little project 
<https://www.youtube.com/watch?v=TVslqpSRKj4&list=FLCzYPC6--I0qVJd0UfMI0GQ> 
(not mine, I just stumbled across it).The video is really well made and 
there is a link to the author's web site. So I ordered the parts so I could 
build it. In the meantime I simulated it in LTSpice. The simulation showed 
an unloaded voltage of around 130V and a loaded voltage of about 70V. The 
real thing seems to produce an unloaded voltage of around 200V. The loaded 
voltage (driving the tube you see in the picture) was around 140V.
 
BTW the design called for a 10K anode resistor, which always seemed 
optimistic to me, and did indeed turn out to be. I dropped it to 1K, (I had 
a choice of 10K or 1K given the SMD resistors I had). It worked much 
better, still the loaded current was only 0.15mA! I'm amazed the tube glows 
at all with that!

Here is a picture:

<https://lh3.googleusercontent.com/-hYFetgOssf0/WTDZCY9hrdI/AAAAAAAAAlo/vlN3raXHQRYfyTf_ppKgelsjIw7pl4WXwCLcB/s1600/FullSizeRender%2B3.jpg>

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