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1810P1

Sensibly equivalent to:
C7428 CV1588 E4205/B/7 VCR139A
See also:
The VCR139A and ACR10 - Mullard Instrument CRT Advert - CV964 short entry - More ex-service CRT Data
    
Extras ▼

 

Rca made the 1810P1 for the UK Government and this CRT is most often known by the RAF Type designation of VCR139A.
The 1810P1 is a small oscilloscope tube that was also used in early WWII radar. The P1 refers to the medium persistence green phosphor.
The connections operating conditions and size make are the same as the ECR30 from Mullard.
The RCA logo and Made in USA on the base cap.
The other side of the base cap shows as VCR139A and also has the RAF stores code 10E/466 printed on it.
The electron gun. Electrostatic tubes need the electrodes accurately placed and here ceramic rods hold the components.
The screen end is 69 mm in diameter.
The end window envelope envelope is 41 mm in diameter, and excluding the B12B base pins is 174 mm tall.
References: Various.

 

Pin Connections
B12B
1
2
3
4
5
6
7
8
9
10
11
12
k
g1
h
h
a2
nc
y2
x2
a1,a3
x1
y1
nc

 

Absolute Maximum Operating Conditions
CRT
Vh
Ah
Va
mAa
4.0
1.1
800
0.003
Updated February 17, 2024.
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