[NJARC] Fwd: {Collins} Identifying Old Tubes

[John Dilks]

Forward -- something worth trying... ( And maybe a UV flashlight too?? -K2TQN)

73, John Dilks, K2TQN
Having fun smelling hot rosin and solder again.


> 
>     ---------- Original Message ----------
>     From: bfetters--- via Collins <collins at listserve.com>
>     To: collins at listserve.com
>     Date: September 2, 2017 at 3:30 PM
>     Subject: {Collins} Identifying Old Tubes
> 
>     Many of you may already be doing this, but thought I'll it pass along to those who haven't tried it.
> 
>     Was cleaning up all the miscellaneous tubes of questionable quality surrounding my trusty old tube checker. I suspect you get that same clutter every so often. The identification on many of the tubes had been worn off. I tried the old "put in freezer and breath on them" method and it worked -- for some.
> 
>     Then someone mentioned to try aiming an LED flashlight across the tube glass at different angles. Wow. Never did that before, but it sure helped bring out the markings on several tubes. If you haven't tried it, give it a shot next time you find a tube with no markings.
> 
>     Buck
>     W0LC
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