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Pen36C

Sensibly equivalent to:
7D6 C70D CV1672 PP35 Pen3520 Pen383
    
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The Pen36C audio output pentode is a B7 version of the CL4. The CL4 has a Ct8 base and the valve was also issued with an International Octal base as the CL33. The B7 base was issued in 1933 and this valve was designed in 1935.
Jeff Harrison writes: the Pen36C is a 200 mA heater type pentode for an 1937 Ecko radio AD38 of 1937. It was used in a lot of pre-war Ekco radios like the AD65 and AD75 round radios. Also the Ekco AD38 TRF radio, quite late for a TRF radio.
Mullard tended to add the Suffix -C to a type fitted with a non-standard base cap for sale in a particular market and this may be true here. If so the valve originated with Philips in Europe.
The classic envelope is 42 mm in diameter and, excluding the B7 base pins, is 116 mm tall.
References: Datasheet & 1043. Type Pen36C was first introduced in 1935.

 

Pin Connections
B7
1
2
3
4
5
6
7
-
g1
g2
h
h
k,g3,m
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
33
0.2
200
200
-5.5
45
6
35,000
8.0
4W
10%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December13, 2012.
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