Western Electric 300B Tubes - Matched Pair

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Our Price $1,499.00 CAD
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Availability In Stock905-503-0850
Special units availablefrom $1,499.00 CAD
300B Magic

Pair of Western Electric 300B tubes. One factory sealed and one used for a few hours.  Originally purchased from our shop a few months ago. In-store pickup please.  1-833-527-3336.


Balanced, Powerful and Refined

The WE 300-B’s sound is balanced, powerful and refined with quality bass from the lowest frequencies through the upper bass. The midrange above is a thing of beauty; dulcet tones, seductive vocals, instruments of all types dimensional and present, all heightening the participatory elements of music.

Burnished and Beautifully Seductive

High frequencies are at once transparent, lovely, sweet, burnished and beautifully seductive. The air and space between performers is extraordinary, performers appear on a quiet and focused soundstage whose width and depth are masterfully rendered. You don’t have to search to findthe sweet spot with a WE 300-B amplifier, it’s all around you.

CLASSIFICATION - Moderate power, filamentary triodes for class-A service.

APPLICATION - Audio-frequency amplifier in positions where power outputs of approximately ten watts or less are required at relatively low plate voltages.

BASE AND MOUNTING - These vacuum tubes employ medium, four-pin thrust type bases suitable for use in Western Electric 143B or similar sockets. The 300-B tube has the bayonet pin so located that it may also be mounted in a Western Electric 100M, 115B or similar socket. The tubes may be mounted in either a vertical or horizontal position. If mounted in a horizontal position, the plane of the filament, should be vertical.

AVERAGE DIRECT INTERELECTRODE CAPACITANCES - Grid to plate 15 μμf. Grid to filament 9 μμf. Plate to filament 4.3 μμf.

FILAMENT RATING - Filament voltage 5.0 volts, AC or DC. Nominal filament current 1.2 amperes. The filaments of these tubes are designed to operate on a voltage basis and should be operated at as near the rated voltage as possible. When alternating current is used for heating the filament, the grid and plate returns should be connected to a center tap on the secondary of the filament transformer.


AVERAGE CHARACTERISTICS - (Ef = 5.0 volts, a.c., Eb = 300 volts and Ec = -61 volts), Plate current 60 milliamperes, Amplification factor 3.85, Plate resistance 700 ohms, Grid to plate transconductance 5500 micromhos.

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