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Pen220A

Sensibly equivalent to:
220PT CV1051 VT51
See also:
CV1051 short entry
    
Extras ▼

 

The Pen220A is very different in shape and design from the Pen220 and this valve was probably made by Cossor.
The Pen220A is a battery output pentode from the 1930s and an uprated Pen220 with twice the anode current and an output of one Watt.
Originally introduced on a B4 base with side terminal in 1931, the B5 based version followed in 1933.
The anode load impedance is given as 6,000 Ohms.
The classic envelope is 42 mm in diameter and, excluding the B5 base pins, is 95 mm tall.
References: 1040 & 1043. Type Pen220A was first introduced in 1931.

 

Pin Connections
B5
1
2
3
4
5
a
g1
f(-)
f(+)
g2

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
2.0
0.2
150
150
-9.0
18
3.6
270,000
2.2
1.1
7%
Updated April 03, 2015.
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