[Amps] Help identifying tubes

[Glen Zook]

Works even better if you put them in the freezer for a little while before breathing on them.

Glen, K9STH

Website:  http://k9sth.com


--- On Mon, 11/29/10, John Becker <johnb3030 at comcast.net> wrote:

Try holding the tubes in front of your mouth and exhaling on them. The  resulting fogging of the glass may make the original markings temporarily visible again. That's an old trick I learned years ago and it frequently works.