Antique radios, Old Time Radios

4f6s

Country:	Soviet Union		Brand:	Common production USSR (Soviet Union)
			Tube type:	Vacuum Pentode Power/Output

Tube ID = 29842


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Identical to	4f6s
Similar Tubes	Other base and other base diagram: 6f6s

Base	Europe 5-Pin (O5A, B5)
Was used by	Radio/TV-reception etc.
Filament	Vf 4 Volts / If: 1 Ampere / -: Indirect / -: Parallel, (AC/DC) /
Description	Maximum ratings : Va = 375 V, Vg2 = 285 V, Pa =11 W, Pg2 = 3,75 W; Vf/k = 90 V; Class A1 operation: Va = 250 V; Vg2 = 250 V; Vg1 = -16,5 V; Ia = 34...36 mA; Ig2 = 6,5...10,5 mA; S = 2,5 mA/V; Ri = 80 k Ohms; Ra = 7 k Ohms; Rk = 410 Ohms; Po = 3,2 W; Vi = 16,5 V-eff; d-tot= 8 %. With exception of heater ratings and base, see more data under 6F6G. [JR]

JK Prüfkarte Röhrenprüfgerät W 18N
Jörg Kulbe

various sources
Jacob Roschy

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4f6s

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