811A Tube Coil Project

This project started after a trip to the Dayton, OH hamfest. I picked up some tubes and some large high voltage mica caps for a good price, and started building.


I found that the 811A was easier to get working than the 572B

(Even though they are supposed to be interchangable???)

These tubes get hot!


Some sparks, but not too impressive.

Copyright 2003 - R. Scott Coppersmith

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