▼ Menu

TV4

Sensibly equivalent to:
CV1412 ME4
See also:
Tuning Indicators - Cathode-Ray Tuning Indicator TV4 - Some Important British Valves
    
Extras ▼

 

This exhibit is a 1936 tuning indicator type TV4. It has the then standard British 4.0 Volt heater, whereas the (otherwise similar) Type TV6 had the new American standard 6.3 Volt heater.
The TV4 was the first Mullard magic eye on the UK market. It was more compact than other available types (which made it popular with set designers) but early specimens had short lives. This was corrected by alterations to the internal design.
The picture clearly shows the construction of this valve with its end window and triode like electrode structure.
The end window envelope is 26 mm in diameter, and excluding the Ct8 base pins is 72 mm tall.
References: Datasheet & 1043. Type TV4 was first introduced in 1936.

 

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
Vg
mAa
4.0
0.3
250
5
0.13
Updated February 10, 2017.
Return to Main Index