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LF

 
See also:
Mullard HF, LF, WECO, ORA & DF.ORA Advert - Mullard HF & LF Advert - Mullard HF & LF Advert
    
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This valve from Mullard has the identification LF and matched the HF Red Ring in design.
Alternatively it could also be a DE06LF from about 1925 that was the dull emitter version of the LF.
The LF is painted with the single green ring and is an AF triode. The type DE06HF had a red band and was the dull emitter version of the HF.
The balloon envelope is 34 mm in diameter and, excluding B4 base pins, is 85 mm tall.
Reference: 1003. Type LF was first introduced in 1924.

 

Pin Connections
B4
1
2
3
4
a
g1
f
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
μ
4.0
0.6
30-90
-2.5
-
30,000
0.28
8.4
Updated April 20, 2013.
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