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220PA

Sensibly equivalent to:
CV1022 K30G L2 LP2 LP2 P220 P220 PB1 PM2A VR22
See also:
Cossor 215P Advert, April 29, 1931 - CV1022 short entry - Cossor 2 Volt Range Advert
    
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The Cossor 220PA is an audio output valve and proclaims the 'New Process' and thus is probably from the early 1930's when this type was first introduced. The electrodes are obscured but with a strong light the single triode section can be seen. This contrasts with our other 220PA that employs two sections in parallel and mica supports in a classic envelope.
The 220PA battery triode a popular type and had many equivalent types. The 220PA produced 0.18 Watts into a 9,000Ω load.
The dome carries the Cossor name, BVA logo, Made in England and V8 but does not have the Type designation etched in.
The classic envelope is 44 mm in diameter and excluding the B4 base pins it is 92 mm high.
References: Datasheet & 1043. Type 220PA was first introduced in 1931.

 

Pin Connections
B4
1
2
3
4
a
g1
f
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
2.0
0.2
150
-4.5
10.0
4,000
4.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated August 24, 2015.
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