Yes you're right, same solution with NCH8200HV for power supply module,
height of transformer is 5mm max, pcb board thickness is 1mm, this's the
thickest part, check picture attached. Actually I have another choice for
make it thinner with 4mm transformer, but it seem to be nosence compared to
5mm.
My first version is only designed for fly pins nixie tubes with tube PCB
adapter, I never thought my last version will compatible with NL-5441 and
NL-841 tubes, still 6mm base, the end of tube pins almost touch the bottom
pcb board.
<https://lh3.googleusercontent.com/-kG50yBz7Z5E/Wqp2cfGYYRI/AAAAAAAAAPU/cVnRtuUzdXkd2fJHGPIeOqVCwbhWWJgcQCLcBGAs/s1600/psu.png>
<https://lh3.googleusercontent.com/-XB7YlsBqDms/Wqp2faE_n-I/AAAAAAAAAPY/VbmGNOtvRaYgZvJmR2XcyRA8ZyPWXCtpQCLcBGAs/s1600/t.png>
在 2018年3月15日星期四 UTC+8下午2:42:03，Tomasz Kowalczyk写道：
>
> I love how thin this clocks base is. I'm wondering how the power supply is
> made - judging from dimensions of your NCH8200HV power supply, fitting that
> transformer isn't an option - or am I wrong? Or is it a boost converter on
> a flat inductor with voltage doublers?
> Anyway, this is the thinnest clock base I've ever seen. In fact, none
> comes even close - second thinnest was 20mm thick (it was fully wooden,
> though). It is really impressive.
> It reminds me of bonsai trees, where very low pots are chosen for
> aesthetic reasons - it helps exposing the tree itself. It works here, too -
> even the small tubes are not dwarfed by the base.
>
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