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Tube Substitutions for:
26
Medium Mu Triode

Type	Substitutes	Base Diagram
26
Web References	26 (RCA) @ Franks Electron Tubes 26 (RCA (HB3)) @ Franks Electron Tubes 26 (Sylvania) @ Franks Electron Tubes 26 (Tung-Sol) @ Franks Electron Tubes 26 @ RadioMuseum.org

RCA Type 26
AMPLIFIER


MECHANICAL DATA

Bulb	ST-14
Base	Medium 4 Pin
Basing	4D

ELECTRICAL DATA

FILAMENT CHARACTERISTICS

Filament Voltage	1.5	Volts
Filament Current	1.05	Amps

DIRECT INTERELECTRODE CAPACATIES

Grid-Plate Capacitance	8.1	��f
Grid-Flimaent Capacitance	3.5	��f
Plate-Flimaent Capacitance	2.2	��f

MAXIMUM RATINGS

Plate Voltage	90	135	180	Volts
Grid Voltage1	-7.0	-10.0	-14.5	Volts
Plate Current	2.9	5.5	6.2	Ma
Plate Resistance	8900	7600	7300	Ohms
Amplification Factor	8.3	8.3	8.3	x
Transconductance	935	1100	1150	�mhos

NOTES:

1	Grid voltage measured from mid-point of a-c operated filament.

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