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6F29

Sensibly equivalent to:
6EH7 EF183
See also:
Valves and their Habits - Frame Grid Valves - Mazda Frame Grid Valves Advert
    
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The 6F29 is a high gain variable μ RF amplifier pentode. It is a 1960s design and superseded the 6F26. The 6F30 was the straight version of the design and replaced the EF80. All four valves have the same pin connections.
The valve performance figures are given at 40 MHz and the normal TV IF frequency was around 33 MHz.
Through the screen the anode can be seen as two small plates joined by a strap.
The grid arrangement of helical suppressor grid and inner grids passing flat across the cathode.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 54 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
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
200
90
-2
12
4.5
0.5M
12.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 24, 2014.
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