▼ Menu

VR21

Sensibly equivalent to:
210LF AR9 CV1021 CV1307 L21 L2
See also:
CV1021 short entry
    
Extras ▼

 

The VR21 is a battery low frequency triode as supplied to the Royal Air Force. The R indicates a receiving valve. When the Common Valve system was introduced in 1941 the VR21 was renamed the CV1021
The reverse of the envelope.
The balloon envelope is 41 mm in diameter and, excluding the B4 base pins, is 83 mm tall.
References: Datasheet & 1040. Type VR21 was first introduced in 1929.

 

Pin Connections
B4
1
2
3
4
a
g1
f-
f+

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
2
0.1
120
-6
7.5
7000
1.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 03, 2015.
Return to Main Index