That's a trick I learned "many" years ago also.
I don't want to start another "I can do better " thread , but I couldn't
resist the thought.!! I first learned of this in the mid-40's, as a "kid"
learning the ropes from the local radio shop owner.!!!!!
carl kz5ca
----- Original Message -----
From: "Arthur Moe" <kb7ww@easystreet.com>
To: <jsb@digistar.com>; <amps@contesting.com>
Sent: Wednesday, December 01, 2004 5:53 PM
Subject: Re: [Amps] Eimac 3-400Z date stamp
> Jason,
>
> Here is a trick that my Elmer told me 40+ years ago about reading info on
tube
> glass. Place the tube in the refrigerator and chill it. When cold remove
and
> breath on it until it fogs up. This sometimes makes missing writing
readable.
>
> Art
> KB7WW
>
> jsb@digistar.com wrote:
> >
> > hi,
> >
> > I have a couple 3-400Z tubes but I can't find the date stamp on the
glass.
> > The dome-shaped flashing along the bottom has 1T-833 engraved into it.
> > Is there any way to derive when these tubes were made from that number?
> >
> > Thanks,
> > Jason N1SU
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
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>
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