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Products - Tubes / Tube Rings - Tube
Product Brand : Western Electric
Product Name : 300-B Vacuum Tube
Product Genre : Tubes / Tube Rings
Condition : NEW

Westrex Corporation is pleased to offer the release of the much anticipated Western Electric 300B electron tube. Originally designed by Bell Laboratories for theatre applications, the Western Electric 300B is regarded as possibly the finest electron tube ever manufactured for high fidelity audio amplification. Audiophiles praise the 300B for its low noise, sonic purity, and long life when utilized in single-ended triode amplifiers and other amplifier designs. Due to its exceptional performance, the 300B has remained the tube of choice among amplifier designers.

Renewed demand for the classic tube led Western Electric engineers to painstakingly and faithfully recreate the original 300B. In every detail, the new 300B is identical to the original version manufactured between 1937 and 1988. These tubes are produced in the new Western Electric facility in Huntsville, Alabama - USA using the original tooling, materials, engineering, specifications, manufacturing techniques and personnel.

The domestic retail price for the 300B is $1700 USD per tube on Ebay.

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 find the 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.

CHARACTERISTICS OF THE 300-B VACUUM TUBE 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.

  Western Electric 300B tube (single)
Price (MSRP)  
CAD 910.00 Special Order
USD 668.85
  Western Electric 300B tube (matched pair)
Price (MSRP)  
CAD 1950.00
USD 1433.25
  Western Electric 300B tube (matched quad)
Price (MSRP)  
CAD 4000.00
USD 2940.00

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