Vacuum Tube - 300B, JJ Electronics

JJ Electronics
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Vacuum Tube - 300B, JJ Electronics

Starting at: $124.95
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The JJ Electronic 300B features a rugged construction in a massive and thick glass envelope atop a white ceramic base. This triode has a full 40 Watts of power. The robust build of the JJ 300B offers high reliability in a classy package. Each tube comes with a factory certification with sets dual matched for anode current and gain. The JJ 300B has a balanced and detailed sound with a wide frequency response.

RoHS Compliant
Item ID:
JJ Electronics
Part Numbers
Single or MatchedOur Part NumberUPC/EAN
Matched PairT-300B-JJ-MP609722122764
Matched QuadT-300B-JJ-MQ609722122771
Product Measurements
Body Height150 mm
Filament Current (If)1.3 A
Filament Voltage (Uf)5 V
Gain (μ)3.85
Grid Voltage (Ug)-61 V typical
Grid capacitance (cg1)17 pF
Grid to Plate Capacitance (ca/g)7.5 pF
Internal Resistance (Ri)700 Ω
Item Diameter63 mm
Item Height165 mm
Plate Capacitance (ca)11 pF
Plate Current (Ia)60 mA
Plate Dissipation (Wa)≤ 40 W
Plate Voltage (Ua)≤ 450 V, 300 V typical
Transconductance (S)5.5 mA/V
Packaging Information
Packaging DimensionsMatched Pair version7.3 in. × 7.1 in. × 3.6 in.
Matched Quad version7.3 in. × 7.1 in. × 7.1 in.
Single version3.45 in. × 3.45 in. × 7.3 in.
Weight (Packaging)Matched Pair version0.896 lbs.
Matched Quad version1.792 lbs.
Single version0.448 lbs.

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PDF: Specification Sheet Specification Sheet552.41 KB

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