[AMPS] Two EHT Transformers

[Rich Measures]

>
>
>I have just obtined a nice EHT transformer 1800-0-1800 V at 450ma DC. 50Hz 
>This will give via a full wave rectifier circuit 2.5kV. Not sure of the 
>current but probably quite a bit, it weighs 20kg and has 130ohms secondary 
>resistance through the entire winding, 65 ohms in each half. To work out 
>the amateur power output is non-trivial, but I would hope it is around 2kVA 
>for 50% duty.
>
>I need 3.5kV - not 2.5kV. Is it sensible to add another transformer in 
>series? 

€  Surely, if the insulation is up to it. 

>Normally one grounds the centre tap, but I have seen the lower 
>voltage versions of this transformer e.g. 900-0-900 1A used with a bridge 
>to give 2.5kV, implying the centre tap can sit at half EHT. The transformer 
>is vacuum impregnated with varnish.
>Effectively, I want to series a 1kV PSU and a 2.5KV PSU - will it work 
>without drama?

€   Only a measurement with a high-potential leakage tester can provide 
the answer.  
-  good luck, Mike


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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