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CV5215

Sensibly equivalent to:
6BL8 6C16 ECF80
See also:
Valves for Bands III, IV & V
    
Extras ▼

 

The CV5215 is a UK government code for the ECF80. Here the retailer, Hall Electric, has added their Haltron logo. Hall Electric specialised in valve exports from the UK.
The triode is the oscillator and has to produce 5 V pk-pk signal. The screened pentode is the mixer. The valve has two cathode connections so that the two valves can be used separately if required.
The triode on the right is mounted, along the side of the pentode anode.
Here the triode can be seen to have heat radiating fins at the top of the extended control grid supports. Between the triode and the pentode is an electrostatic screen.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 47 mm tall.
References: Datasheet & 1040 Type CV5215 was first introduced in 1954.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.43
250
180
-5.8
5.7
1.4
1.5M
2.1

 

Absolute Maximum Operating Conditions
Triode
Va
Vg
mAa
ra
gm
100
-2
14
4K
5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated June 24, 2018.
shape:thin.glass.tube construction:all.glass type:triode.pentode age:1950.1960 base:b9a heater:6.3v pins:9 pin:1.a(t) pin:2.g1 pin:3.g2 pin:4.h pin:5.h pin:6.a pin:7.k.s.g3 pin:8.k(t) pin:9.g1(t)
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