6J2 – What does this vacuum tube do?

So I’ve been messing with amps and records and stuff, and I already mentioned that I ran across a small amp that uses 6J2 tubes. What the heck are they, and why would someone want to have a fragile tube in an amp? Are they for looks, or do they actually do something?

Let’s find out!

Manipulate a Plane with a Laptop from the Cabin

Check out my project page related to steering an aircraft from a laptop… yeah, you can do that! This is for information purposes only, of course. It takes some work to make everything pan out.

We’ve used this method to steer planes….