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6F19

Sensibly equivalent to:
6BY7 EF85 W719
See also:
Valves and Their Habits - Ediswan First Preference Range Advert
    
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The 6F19 is described as a VHF varible-mu pentode, this places the valve in a superhet context with AGC applied to the RF and IF sections. It was a television valve and the frame grid valves overtook its performance.
The anode is formed from two small curved plates joined by a single strap. There are screens above and below the micas that connect to the mesh screen.
The envelope seems larger than required by the electrode assembly.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 57 mm tall.
References: Datasheet & 1040. Type 6F19 was first introduced in 1959.

 

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
250
100
-2.0
10.0
2.5
0.5M
6.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 13, 2016.
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