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ECL86

Sensibly equivalent to:
6GW8 CV8297
See also:
A Low Cost Amplifier - 10W Stereo Amplifier - A Economical Stereo Amplifier - Audio Triode Pentode ECL86
    
Extras ▼

 

The ECL86 was one of the last triode plus output pentode valves designed and was released to the market in 1962. Uses were in domestic radio and audio equipment. Normally in single ended output stages for radio-grams and tape recorders. The design proved popular in low cost stereo systems. The ECL86 was preceded by the ECL82.
The construction of this Cossor valve looks exactly the same as the Mullard exhibit and it is likely they both came from the same production line.
The small triode on the left is virtually half of an ECC83. Note the mica support for the top of the triode that sits on a metal screen.
Front view of the triode with pentode behind.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 70 mm tall.
References: Datasheet & 1040. Type ECL86 was first introduced in 1961.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
g1(t)
k(t)
g2
h
h
a
k,g3,s
g1
a(t)

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.7
250
-1.9
1.2
62k
1.6

 

Absolute Maximum Operating Conditions
Pentode
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
250
250
-7
36
6
48k
10
4W
10%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 07, 2015.
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