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CV2570

Sensibly equivalent to:
210HF HL2 HLB1 PM1HF
    
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The CV2570 is a military marked 210HF. This battery triode was designed for HF use, and in those days a few MHz was high frequency. It is a receiver valve from the days of the TRF (tuned radio frequency) receiver.
The balloon envelope is 40 mm in diameter and, excluding the B4 base pins, is 79 mm tall.
References: Datasheet & 1040.

 

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
0.1
150
-3
1.6
15,800
1.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 13, 2013.
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