Mystery Tube

[Sandy W5TVW]

----- Original Message -----
From: "Dennis Norton" <dnorton1 at ROCHESTER.RR.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Tuesday, December 18, 2001 10:20 PM
Subject: Mystery Tube


Hi Gang--time to crank up the craniums for a round of stump the list.

I have an old RCA tube-octal base, metal casing 1 1/4 diameter, 3 1/2 inches
tall. The number on it is 913 and a date code?? is 3-17. The other markings
are "RCA radiotron electron tube". The top of the tube is glass and makes
you want to think it is a green eye tube....however--instead of being able
to see the metal part that would glow green, the glass is inside coated with
white. Looks kind of like a little CRT.

I have scoured all of my tube charts and technical stuff from the beginning
of time (almost) and cannot find any reference to a # 913 tube.

Any one have a clue??   Thanks.....Dennis Norton    W2DJN


BINGO!  It is a 913 1" CRT.  They were made for amateur low cost
oscilloscope
construction.

73,
Sandy W5TVW

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