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CV417

Sensibly equivalent to:
6AQ4 6L34 CV139 CV4070 EC91
See also:
The EF91 and the Blue Band
    
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The CV417 is a miniature single triode for use as a grounded grid amplifier, and thus at high frequency.
This type of valve was designed for RF applications at VHF up to a maximum frequency of 250 MHz. These would include radio, television and radar. The equivalent noise resistance was given as 400 Ohms. The M8099 special quality version was made for critical applications the commercial Types are 6AQ4 & EC91. The latter being the prototype for the CV417.
The triode is in the centre and the outer rods are supports.
The triode face view. The control grid is fitted with heat sink fins. The cathode is rectangular.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.
References: Datasheet & 1040.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
k
h
h
k
g1
a

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.3
250
-1.5
10
12k
8.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 19, 2018.
shape:thin.glass.tube construction:all.glass type:triode age:1940.1950 base:b7g heater:6.3v pins:7 pin:1.g1 pin:2.k pin:3.h pin:4.h pin:5.k pin:6.g1 pin:7.a
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