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Re: [TCML] The Dreadful Task of Ballasting (longish)



Hi Phil,

Since it's a static gap, the cap voltage should be clamped at the gaps breakdown voltage. You may very well not be quenching well and affecting the static gap. I've run up to 2500W on my static gap ok, but I'm not sure how high your sucker gap can go. A rotary would be good for this higher power, but I think you can get the static gap to function ok. If the cap is resonant with the upstream inductance, then you will want to upgrade the cap size as Bert suggested. Something to consider however is how large that cap size would be and the energy.

Knowing the transformer data will help. Measuring the open circuit primary current will allow a look at L1 to see if it really is the 176mH you mentioned. Be careful with the primary Isc. Best to check it at a low voltage and slowly turn it up to see how the current reacts so that you don't fry a meter. An analog will probably be necessary. That primary Isc will tell you your Cres value for that transformer.

Glad you got the spreadsheet.

Take care,
Bart


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