Re: [TCML] New high voltage source for VTTC

[DC Cox <resonance@xxxxxxxxxxxx>]

What are the power supply specs for the GU5B?   Higher power than an 833C or
???

Dr. Resonance





On Sun, Feb 8, 2009 at 9:55 PM, alfred <alfred@xxxxxxxxx> wrote:

> Hi list
>
> I am slowly building a new VTTC with a big russian tube (GU5B) and I needed
> a more powerful high voltage transformer to power it. Unfortunately I have
> only small MOTs with different outputs, so it would be hard to simply
> parallel them.
>
> So, I designed a powersource, using the MOTs I have in hand. The doubler
> cap will charge at the higher voltage from the biggest MOT and the currents
> will add to another through some unidirectional paths (using HV diodes). I
> tryed the new source with one of my VTTCs and the results seem to be
> satisfactory.
>
> The design discussion, drawings, setup pics and movies are published here:
>
> http://4hv.org/e107_plugins/forum/forum_viewtopic.php?60496
>
> The suggestion from the forum guys was simply parallel the MOTs, because
> the power dissipation from the leaking current would be too small to
> consider, but I was worry to not loose power (the output difference from the
> MOT secondaries was 92 V at full mains voltage = 220 V). Another variant was
> to take off the shunts and modify the number of turns in the MOT primaries,
> but I was too afraid to not damage the xfrms (it is hard to get them here).
> So, maibe I have chosen the complicated way, but still it seems to work.
>
> teslina
>
>
>
>
>
>
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