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EK2

Sensibly equivalent to:
CV1426
See also:
The Latest Octode Frequency Changers
    
Extras ▼

 

The EK2 is an octode frequency changer. The Ct8 base is a continental Europe design and this exhibit is marked as being made in Holland. This would be at one of the Philips factories, as Philips owned the UK company Mullard.
This is an unused example of the EK2 our other exhibit EK2 has been well used and also proudly proclaims Mullard as a BVA member and makes no mention of a foreign connection. This would be typical of the period as protecting the home industry was seen as important.
In the UK Mullard replaced the EK2 with the EK32. This is identical to the EK2 but on an IO base.
The oscillator voltage needed to be generated for proper operation is 12 volts peak.
The classic envelope is 29 mm in diameter, and excluding the Ct8 base pins, is 84 mm tall.
References: Datasheet, 1040 & 1043. Type EK2 was first introduced in 1938.

 

Pin Connections
Ct8
1
2
3
4
5
6
7
8
tc
m
h
h
k
g2
g1
g3,g5
a
g4

 

Absolute Maximum Operating Conditions
Octode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.2
250
60
-2.0
1.1
1.0
2M
0.55
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated August 11, 2015.
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