Dual 812A Vacuum
Tube Tesla Coil

This page is the area where I explain some of my projects I am currently working on, as well as those that have been completed in the very recent past but are relevant still. Any questions about them are welcome and can be submitted by way of the feedback page and will be answered in some way or another...

I decided one night to build a dual 812A vacuum tube Tesla coil from scratch, and it worked out beautifully. The 812A tubes are very similar if not indistinguishable from the 811A tubes, which are common for tube coiling. As it turns out, the 812A/811A tubes have much less demanding filaments, run cooler, and are much more forgiving than the 304TL tubes. I am very happy with how this turned out, and plan to make many important improvements as I go along.

I decided to make a dual 812A VTTC from scratch tonight, and this photo was taken about halfway through the construction...

The final construction of the dual 812A Mt Dew coil, set up and ready to go.

Dual 812As are beautiful in the dark...

Corona from the un-tuned dual 812A setup. Hard to see in the dark, but excellent nonetheless.

Holding a home-made plasma globe near the terminal results in a nice looking beam, which is strong enough current to feel, unlike normal plasma globes. I need to fill that with a noble gas mix instead of just backfilled air eventually.

Touching the corona produces tiny pulsing poke sensations in your hand. It's fun, but nearer to the terminal is not so fun.