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Z329

Sensibly equivalent to:
30F5 7ED7 PF818
See also:
Valves and their Habits
    
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The Z329 is a miniature screened pentode that was designed to operate at the standard TV intermediate frequency of 33 MHz. The IF stages in any superhet receiver are where the main signal voltage amplification takes place.
Through the dirt can be seen the strap connecting the two small plates of the anode. The open pitch of the suppressor grid can also be seen. The control grid is wound on copper supports.
The heat radiating fin on the top of the control grid supports.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 59 mm tall.
References: Data-sheet & 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
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
7.5
0.3
170
170
-1.9
10
2.6
8.8
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 26, 2020.
shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base:b9a heater:300ma pins:9 pin:1.k 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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