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30

Sensibly equivalent to:
CV604
    
Extras ▼

 

The Type 30 is a general purpose amplifier triode. It is directly heated for use with battery supplies. The 2.0 Volt filament was for use with a lead-acid accumulator.
The low power power triode does not require a blackened anode for more efficient heat radiation but the thin nickel sheet is ribbed for mechanical rigidity.
The front support rod holds the filament tension spring wire. The filament can be seen to be a single inverted V.
The classic envelope is 38 mm in diameter and, excluding the UX4 base pins, is 87 mm tall.
Reference: Data-sheet. Type 30 was first introduced in 1936.

 

Pin Connections
UX4
1
2
3
4
f
a
g1
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
μ
2.0
0.06
180
-13.5
3.1
10,300
0.9
9.3
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 18, 2021.
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