▼ Menu

EM1

Sensibly equivalent to:
CV2942
See also:
Tuning Indicators - EM1 and the EM1
    
Extras ▼

 

The EM1 is a magic eye tuning indicator. The control voltage swing required is 5 Volts to move from minimum to maximum shadow within the bowl of the screen.
The other EM1 has a conventional domed envelope. This valve, like the EM4, has a recessed window that makes for an elegant design.
The internal construction follows the normal pattern for tuning indicators.
The Ct8 base is clean and clearly this is a new valve.
The wide glass tube envelope is 26 mm in diameter and, excluding the Ct8 base pins, is 73 mm tall.
References: Datasheet & 1043. Type EM1 was first introduced in 1937.

 

Pin Connections
Ct8
1
2
3
4
5
6
7
8
-
h
h
k
-
g1
t
a

 

Absolute Maximum Operating Conditions
CRT
Vh
Ah
Va
mAa
6.3
0.2
250
0.13
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December31, 2012.
Return to Main Index