Description
2A3 / 300B tube amplifier push-pull output transformer, high-power imported ED20x50 iron core winding, 3.5K: 4Ω8Ω16Ω, the transformer can also be used for other types of electronic tubes, or multi-tube parallel output.
Imported second-hand dismantled 4C core, thin 0.26mm, 4C core is also called ED shell core, ED20x50 specifications, core column cross-sectional area 7.36 square centimeters, core weight 3kg / pair (a transformer)
The domestic large factory QA oxygen-free copper and copper enameled wire, borderless coil, layered paper pad process, each layer of pure wood pulp insulation paper insulation, using a large number of foreign brands of output transformer winding method of 28 layers, 20 layers There are 46 connectors in the secondary eight layer. The secondary output of the transformer is available in 4Ω, 8Ω, and 16Ω.
The transformer primary and secondary wire diameters are 0.42mm, the primary over-current 350mA, the secondary 8-wire parallel over-current 2.8A.
Transformer external dimensions: 140mm wide, 170mm high, 120mm thick vertical, weighing 10.46kg / pair.
This is a 2A3, 300B push-pull output transformer, there is also a single-ended output transformer, the price is the same.
Measured basic parameters:
Primary inductance is about: 195H 100Hz
Primary copper resistance: 108Ω
Secondary copper resistance: 1Ω (4Ω), 1.4Ω (8Ω), 2Ω (16Ω)
Distributed capacitance: 10-11NF 2KHz measurement
Leakage: 15-25mH 100Hz
Frequency response: 10Hz-36KHz -0.5db.
Due to the upgrading and improvement of process manufacturing, the parameters will be continuously optimized, the above is for reference.
The data will be different due to different measuring line instruments, for reference only.
This push-pull output cattle primary copper resistance is only 108Ω, inductance is about 195H, distributed capacitance is 10.5NF, and leakage inductance is 15-25mH.
