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EF89

Sensibly equivalent to:
6DA6 CV5156
    
Extras ▼

 

The EF89 is a miniature RF variable μ voltage amplifier pentode for use as an RF or IF amplifier in FM/AM receivers and is designed to work with a tuned anode circuit.
Through the hole in the screening mesh can be seen the three wire grids. The anode is a pair of plates one on either side of the central cathode.
The back of one anode plate. The grid wires extend beyond the width of the anode.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 52 mm tall.
References: Data-sheet & 1040. Type EF89 was first introduced in 1954.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
s
g1
k
h
h
s
a
g2
g3

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.2
250
100
-2
9
3
1M
3.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 22, 2020.
shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.s pin:2.g1 pin:3.k pin:4.h pin:5.h pin:6.s pin:7.a pin:8.g2 pin:9.g3
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