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EF80A

 
    
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The EF80 internally screened pentode was a workhorse of the VHF TV receiver and was introduced in mid 1950 to replace the EF91. Here we have the EF80A a variant that we can find no data for, and so the EF80 data is presented.
The construction seems to be the same as the regular EF80.
The thin glass tube envelope is 20 mm diameter and excluding the B9A base pins, is 60 mm tall.
References: Datasheet & 1040.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Va
Vs
Vg
mAa
mAs
ra
gm
170
170
-2
10
2.5
0.4M
7.4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 01, 2014.
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