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CV452

Sensibly equivalent to:
6AT6 DH77 EBC90
See also:
The 'Magic Three' Valves - Automatic Volume control - The Neophyte Amplifier
    
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The CV452 was designed as a demodulator and first audio stage in superhet receivers. All stages share the cathode which would be held at ground potential. The prototype was the commercial 6AT6.
From the side the structure is revealed. The central dark cylinder is the triode section and the two wings are the diode anodes, one for AGC and the other for AM signal demodulation. The inverted U shaped wings are mounted on either side of the central cathode tube and are separated from one another by the micas.
The thin glass tube envelope is 17 mm in diameter and, excluding the B7G base pins, is 46 mm tall.
References: Datasheet, 3002 & 1040. Type CV452 was first introduced in 1946.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
k
h
h
a(d2)
a(d1)
a

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.3
250
-3
1.0
58,000
1.2
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 07, 2013.
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