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DH77

Sensibly equivalent to:
6AT6 CV452 EBC90
See also:
The 'Magic Three' Valves - Automatic Volume control - The Neophyte Amplifier - Osram Junior Amplifier
    
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The DH77 / 6AT6 is an amplifier triode with twin signal diodes on a common cathode. It was designed for use in superhet receivers located at the end of the IF chain and as the first audio amplifier feeding the output stage.
The Osram consumer brand of M-OV.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 47 mm tall.
References: Datasheet, 3002 & 1040. Type DH77 was first introduced in 1950.

 

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 May 15, 2015.
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