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ECC85

Sensibly equivalent to:
6AQ8 6L12 B719
See also:
Valves and their Habits - Television Reception on Band V
    
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The ECC85 is the definitive double triode for the front end stages of FM radio receivers. It was designed specifically for the purpose and released in 1954. This exhibit by Philips has ate Miniwatt brand name.
See also UCC85 and PCC85.
The two independent valves are screened by a rectangular plate across the diameter of the envelope. The screen extends beyond the area of the triode sections to offer the maximum screening between oscillator and mixer.
One box anode with side flanges for heat sinking and to allow stitching together of the thin sheet.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 48 mm tall.
References: Datasheet & 1040. Type ECC85 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
Vg
mAa
ra
gm
6.3
0.435
250
-2.3
10
9700
5.9
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 14, 2017.
shape:thin.glass.tube construction:all.glass type:double.triode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.a(2) pin:2.g1(2) pin:3.k(2) pin:4.h pin:5.h pin:6.a(1) pin:7.g1(1) pin:8.k(1) pin:9.s
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