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DC3/HL

 
    
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The DC3/HL has a 25 Volt 100 mA filament and the DC/HL runs from 6.0 Volts at 500 mA both are indirectly heated. The characteristics of the DC/HL differ slightly from the DC3/HL.
Both versions are described as detector or audio triodes. The DC3/HL would be suitable for use in a series heater chain.
The triode section housed between mica sheets.
The Type designation is on the dome of the envelope.
Thanks to Mark Mallison for sending the images.
The classic envelope is  mm in diameter, and excluding the B5 base pins is  mm tall.
Reference: 1043. Type DC3/HL was first introduced in 1931.

 

Pin Connections
B5
1
2
3
4
5
a
g1
h
h
k

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
25
0.1
200
-3.5
5.0
11,700
3.0
Updated December08, 2018.
shape:classic construction:pinch type:triode age:1930.1940 base:b5 heater:100ma pins:5 pin:1.a pin:2.g1 pin:3.h pin:4.h pin:5.k
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