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HP215

Sensibly equivalent to:
210SPT HP210 SPT2
    
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The HP215 battery variable μ pentode was produced in two versions, one on a B7 base and another on a B4 base. The latter had the screen grid internally connected to the filament.
The HP215 was designed as a pentode mixer.
The classic envelope is 36 mm in diameter and, excluding the B7 base pins, is 104 mm tall.
References: 1043. Type HP215 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
gm
2.0
0.15
150
70
-0
3.75
0.6
0.55
Updated December14, 2012.
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