▼ Menu

6C12

Sensibly equivalent to:
6AJ8 CV2128 ECH81 X719
    
Extras ▼

 

The Mazda 6C12 triode heptode was designed for the role of frequency changer (mixer) in superhet receivers. This double valve has a common cathode. The triode is to be used as the local oscillator feeding the 13 Volts pk-pk amplitude sine wave to the heptode mixer.
The reverse side shows the made in England lettering.
A close-up on the valve reveals that the triode is mounted above the heptode section. The triode grid can be seen through a hole in the outer screen.
The thin glass tube envelope is 20 mm in diameter and, excluding the B9A base pins, is 57 mm tall.
References: Datasheet, 3002 & 1040. Type 6C12 was first introduced in 1955.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
g2,g4
g1
k,g5,s
h
h
a
g3
a(t)
g1(t)

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
mAa
6.3
0.3
100
13

 

Absolute Maximum Operating Conditions
Heptode
Va
Vs
Vg
mAa
mAs
ra
gm
250
250
-2
6.5
3.8
0.7M
0.775
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 12, 2016.
Return to Main Index