How To Make A Homemade Vacuum Tube: Part 4 - The Valve
Channel: BlueJersey112
Date: 15/10/2012

And now for the last part in building the tube: The valve. This ensures that you have an airtight seal. Yet, if for any reason, you can always open it for maintenance.

When you flare the tubes, it can become a really fustrating ordeal at times. Because it's not really defined just how much the tube should stick out from the flaring kit. When it comes down to flaring the right way, you pretty much have to eye-ball it (dead-reckoning). And this comes with trial and error. :(

Once you have that part down, everything else is pretty easy. Just make sure to keep the inside and edges of the fittings clean and unobstructed.

Have fun!