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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.
More images on the CV2821 exhibit.
The wide glass tube envelope is 29 mm in diameter and, excluding the IO base pins, is 68 mm tall.
References: Data-sheet & 1040. Type ECC33 was first introduced in 1949. See also 1949 adverts.

 

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 March 07, 2022.
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