[Mondial]

Thanks for posting the schematic. Looks easy to build and I have all the parts needed, so I may give it a try.

I have a feeling that the switching freq may be a bit low though. From what I understand, Mallory used a standard frequency of 115 Hz for its vibrators. This higher freq was to minimize the size and weight of the core needed for the transformer.

Here is a PDF of the Mallory design manual for vibrator power supplies. It gives more info than I have ever seen in one place regarding their engineering and use. Frequency of operation is discussed beginning on page 19.

Interesting reading, and helpful info for the design of a modern solid state replacement.

http://www.tubebooks.org/Books/mallory_vibe.pdf