[Amps] An inexpensive choke for a resonant filter

[Steve Thompson]

Vic K2VCO wrote:

> Angel Vilaseca wrote:
>
>
>> I wonder if a HV transformer from a microwave oven cold be recycled 
>> in a HV power supply, using its secondary winding a a choke. It's big 
>> and it's free!
>
>
>
> I have one of these and it looks like one side of the secondary is 
> designed to be grounded. So the insulation may be poor at this point. 
> If this is the case with yours, you might think about using it in the 
> negative side of the power supply.

I have three here I'm experimenting with (as HV supplies). I lifted the
grounded end of the secondary on all of them - two hipot to 8kV+, the
third arcs at 3kV but a piece of Kapton tape on the frame under where
the wire comes out of the bobbin takes it beyond 8kV too.

Steve