Hammond 260J 152VA 650V C.T. Universal Primary Plate Transformer

The 260J is a 152 VA plate and filament transformer with a 650V centre-tapped high voltage secondary at 173 mA, a 5V filament winding at 2A and a 6.3V C.T. filament winding at 4A. It is intended for tube amplifiers, preamps, test equipment and general replacement where the universal 100, 120, 220 or 240 VAC, 50/60 Hz primary allows use on North American or international mains.

Construction is economical open frame, chassis mount, and the series is offered in two-hole channel bracket (figure #1) or four-hole (figure #2) styles. The 260J is drawn as figure #2, the four hole mounting style, with 0.22 x 0.56 in (6 x 14 mm) mounting slots. Ordering-table dimensions are A 3.75 in (95 mm), B 3.13 in (80 mm), C 3.13 in (80 mm), D 3.12 in (79 mm) and E 2.75 in (70 mm). Leads are a minimum of 5" long, and the shipping weight is 5 lbs (2.27 kg).

The 260J includes a Faraday shield between the primary and secondary windings. This electrostatic shield reduces capacitive coupling from the primary, greatly attenuating higher frequency current coupling to the secondaries. The shield lead, the gray wire marked SH, should remain grounded to the mounting bracket and in turn to the chassis.

The universal primary has taps for 100, 120, 220 or 240 VAC at 50/60 Hz, and the units are designed to run with BOTH primary windings energized for maximum efficiency. The 260J is listed as REACH compliant and RoHS compliant.