[TCML] Low Frequency AC

[Frank <fxrays@xxxxxxxxxx>]

Hi all,
I have a really strange question that is not really Tesla related but 
will all the HV expertise out there, someone might have a suggestion.

I need a high voltage, say around 6KV @ 30 ma +- AC source at 15 hz.

I was thinking of rectifying the AC to 110, no filters, and then 
building a mechanical chopper to drive a NST, kind of like an old 
vibrator car tube radio circuit.

I know the low frequency for the transformer is not very efficient 
but I am also not looking to run the system for more than a couple minutes.

I have picked up an a custom made Holtz tube in the form of a full 
wave bridge rectifier and I need to drive it at a low frequency so 
you can see each leg of the bridge conduct.

A Holtz tube was a unique type of Geissler tube where a large dia 
tube has a series of glass funnels inside and then it is pumped down. 
The shape allows current to pass in only one direction. The 
forerunner of the cold cathode rectifier!

The tube is currently still in Germany but I have some pix of it in 
operation if anyone is interested. It is powering a Geissler tube and 
you can see the tube is operating on DC by the lack of glow on one 
electrode of the Geissler.

Thanks, Frank  
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