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PT2

Sensibly equivalent to:
220OT ARP1 KT2 PM22A Pen220 PenB1
    
Extras ▼

 

Type PT2 is a battery output pentode of the early 1930s.
The bright anode spot welded to the vertical supports.
The two filament tension springs.
The dome carries the maker name plus the Type designation. The grids can be seen through the hole in the top mica.
The balloon envelope is 50 mm in diameter and, excluding the B5 base pins, is 98 mm tall.
Reference: Data. Type PT2 was first introduced in 1931. See also 1931 adverts.

 

Pin Connections
B5
1
2
3
4
5
a
g1
f-,g3
f+
g2

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
Pout
2.0
0.22
150
100
-6.0
8.0
6.0
1.5
0.6W
Updated May 20, 2023.
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