The Amplimo XN1887 is a 210 VA toroidal power transformer for valve amplifier projects, featuring dual 115 V primaries and multiple secondary windings including 330 V, 40 V, 15 V, and two 6.3 V outputs.
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Amplimo XN1887 210 VA Toroidal Power Transformer for Valve Amplifiers
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The Amplimo XN1887 is designed for valve amplifier power supply stages where multiple secondary voltages are required from a single transformer. With a 330 V high-voltage winding rated at 0.4 A, two 6.3 V heater windings rated at 3.5 A each, plus 40 V and 15 V auxiliary windings, it is well suited to demanding amplifiers and related DIY audio electronics.
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The primary side uses two 115 V windings that can be connected in series for 230 V operation or in parallel for 115 V operation. All secondary voltages are specified under full ohmic load, with an approximate regulation of 8.5%, giving predictable performance for carefully designed power supplies.
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Installation is supported by approximately 200 mm long leads and included mounting materials: one 90 mm metal washer, two 90 mm neoprene washers, and an M5 x 60 bolt with nut. The primary and high-voltage winding leads are flexible, while the remaining leads are solid, helping to keep wiring clear in amplifier chassis layouts and amplifier accessories projects.
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The XN1887 measures 112 mm in diameter and 54 mm in height, excluding mounting materials, and weighs 2.3 kg. It is built and tested according to EN61558 and carries CE marking. Time-lag primary fuses are required: 2 A 5 x 20 mm IEC127 high I²t in series for 115 V mains operation, or 1 A 5 x 20 mm IEC127 high I²t for 230 V mains operation. Additional protection for the secondary windings is required.
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