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6BQ7A

Sensibly equivalent to:
CV5365
See also:
Valves for Bands III, IV & V - Nuvistor Valves - Brimar 6BQ7A Advert
    
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The 6BQ7A is an all glass miniature VHF double triode and is internally screened.
A valve like this would be used for RF amplification, or frequency multiplication. In the latter case the valve is operated as a non-linear (Class C) amplifier. This causes harmonics of the signal frequency to appear in the anode current. The anode tuned circuit is then chosen to resonate at one of the harmonics, usually the second or third.
One anode with the screen behind.
This view shows how the screen encloses the right hand triode.
The thin glass tube envelope is 20 mm in diameter and excluding the B9A base pins the valve is 49 mm long.
References: Datasheet & 1040. Type 6BQ7A was first introduced in 1954.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
mAa
gm
6.3
0.4
150
9
6.4
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 25, 2016.
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