|Dual 120V/240V primaries, 2A heater supply; ideal for preamps and amps up to 5W output
This power transformer is designed as a replacement or alternative for those popular amp circuits that specify the Hammond 269EX or 369EX power transformer. It has dual 120V/240V primary windings and two secondary windings. The high voltage winding is 190-0-190V rated at 80mA. In a typical circuit, this will produce a B+ of around 250V after smoothing.
The heater supply secondary is a non-CT 6.3V rated at 2A. That makes it perfect for an amp using two 12AX7s and a single EL84 or 6V6, or a channel-switching preamp using as many as six 12AX7 valves.
Dimensions & info
It’s 78mm wide, 62mm deep and 64mm tall, with standard solder lugs for all primary and secondary connections. It’s supplied in a ‘drop through’ (also known as lay-down) style. This mounts through a rectangular cut-out in the chassis (such as that in the AC02 medium) and AC04 small chassis. The rectangular cut-out should be 54x49mm, and the four 4mm mounting bolts are on 64x51mm centres.
2 x 120V
190 – 0 – 190V @ 80mA
Heater winding 6.3V at 2A centre tapped.
High quality silicon steel
Hand laminated for the best stacking factor, and accuracy.
Separate primary and secondary sections for safety.
Double coated Grade 2 enamelled copper wire.
Wound using CNC winders for highly accurate wire placement and turns count.
Built and tested to safety standard BS EN 61558-1 2005