dekatron 6809 issue

[ron]

Hello!

Please save all of the old dekatrons even if they are in bad shape. I am
currently working on a way to recharge the tubes. This is much more
difficult than it first seems so it will take a lot of experimenting. I
am finding that trying to mix the gasses under vacuum at operating
pressure is not practical. So I will mix the gasses at atmospheric
pressure to the proper proportions and then charge the mix into the
tube. Even this is tricky to do!
But it may in the end be possible to bring the tubes back to normal.
Save the duds!

ron (glasslinger)