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ECC33

Sensibly equivalent to:
CV2821
See also:
Mullard EF37, ECC33 & EL37 Amplifier Advert, May 1949
    
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Mullard, in 1949, describe the ECC33 as a high slope, low impedance double triode with low heater consumption, primarily intended for use in flip-flop, scaling and computer circuits. The electrode assembly is considerably smaller than other double triodes of the period.
The wide glass tube envelope is 30 mm in diameter and, excluding the IO base pins, is 67 mm tall.
References: Datasheet & 1040. Type ECC33 was first introduced in 1949.

 

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

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.4
250
-4
9
9,700
3.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 31, 2013.
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