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UF89

 
See also:
EF89 & UF89 Advert.
    
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The UF89 is an internally screened variable μ pentode designed for VHF applications in Band I and Band III televisions. It is a low impedance device and may have found application in receiver front ends.
Looking through the mesh of the outer screen the three grids can be seen. The anode is formed from two small plates strapped together top and bottom.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A pins is 53 mm tall.
References: Datasheet & 1040. Type UF89 was first introduced in 1955.

 

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
12.6
0.1
170
110
-2
12
3.9
0.525k
3.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 04, 2016.
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