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SP2

Sensibly equivalent to:
210SPT ARP2 CV1320 SPT2 Z21 Z22
See also:
Mullard 'Straight' Screened Pentodes - 2 Volt Valves for Battery Receivers
    
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The SP2 is a directly heated battery pentode from 1934. It was designed for broadcast radio reception.
We also have the older balloon style SP2 with the screw top cap.
The classic envelope is 43 mm in diameter and, excluding the B7 base pins, is 115 mm tall.
References: Datasheet & 4024. Type SP2 was first introduced in 1934.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
m
g1
g3
f
f
-
g2
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
2.0
0.18
135
135
0
3.0
1.0
0.7M
1.8
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated September 13, 2013.
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