The 10M2 is a dual sensitivity magic eye tuning indicator. The heater is designed for 100 mA heater chain service in universal sets without a mains transformer.
The grid voltage range for the whole deflection range is either 3.0 Volts or 20 Volts.
The envelope metallising obscures the envelope structure but the country of origin is visible.
Seen through the top of the envelope the control structures can be seen.
The wide glass tube envelope is 26 mm in diameter, and excluding the base pins is 75 mm tall.
Pin Connections
IO |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |

|
h |
ic |
a(2) |
t |
g1 |
a(1) |
k |
h |
Absolute Maximum Operating Conditions
CRT |
Vh |
Ah |
Va |
Vg |
mAa |

|
12.6 |
0.1 |
200 |
- |
0.4 |
Thanks to Frank Philipse for supplying the above datasheet
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