The 3RP1 is a duodecal design with a 12E base and the pinout is as follows:
1  Heater
2  Grid
3  Cathode
4  Anode1
5
6  Top
7  Bottom
8  Anode2
9  Right
10 Left
11
12 Heater
--tom
At 06:16 PM 6/7/2004 -0400, you wrote:
 Does anyone know where I can find the pinout for a 3RP1
CRT?  I have
the CRT and I have most of the important numbers (V/in deflection,
final anode voltage, that sort of thing) but I do not have the pinout.
I went a-googling, but all I found was a few places that had the silly
things for sale.
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