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ECC88

Sensibly equivalent to:
6DJ8 CV5358 M3624
    
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The ECC88 is a VHF double triode with separate cathodes. The ECC88 was designed for service as a cascode amplifier in the front ends of VHF radio receivers. One triode acted as the local oscillator and the other as the mixer (frequency changer).
The stylised logo was introduced in 1970. In this exhibit the glass is marked as Imported - accurate and not pejorative as was the earlier use of Foreign, designed to suggest that British was the best.
The anode has a deep recess. The internal face of the recess is the working face of the anode, the rest of the metal is for support and heat dissipation.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 47 mm tall.
References: Data-sheet & 1040. Type ECC88 was first introduced in 1958. See also 1958 adverts.

 

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
gm
6.3
0.365
90
-1.3
15.0
12.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 21, 2022.
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