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ID = 55522
Great Britain (UK)
Brand: Standard Telephones and Cables Ltd. (STC); London, Foots Cray
Tube type:  Vacuum Pentode   clamp grid 
Identical to 5A/170K = E180F = CV3998

Base Noval, B9A
Was used by Telephony
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel, (AC/DC)
Description Special Quality Valve. RF Pentode with gm of 16.5. Triode connected, it achieves gm of 21mA/V.
Specified by UK's General Post Office. 
Dimensions (WHD)
incl. pins / tip
22 x 45 x mm / 0.87 x 1.77 x inch
Weight 8 g / 0.28 oz
Literature - - Manufacturers Literature   
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5A/170K: scc
Christian Schaufelberger


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