[R-390] 6DC6 Replacement/Glass cutting methods

[Jerry Kincade]

Me, too. Might be useful in adapting tube bases and R-390A filters to my
75A-4.
73, Jerry W5KP

> Seriously though -- I'm interested in your tube cutting technique.  Handy
to
> make up 7 and 9 pin plugs out of bad tubes.
>
> Barry
>