>
>
>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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