AWA Universal Battery Eliminator (UBE) PCB
This printed circuit board component and the resulting battery eliminator are intended for experienced persons. The completed unit and associated components produce potentially dangerous voltages.
The UBE printed circuit board (PCB) measures 6 ¼ by 6 ¾ inches with a maximum height of 2 ¾ inches. Three PCB-mounted transformers along with rectifier and regulator circuitry develop the “A”, “B” and “C” supply voltages. The transformers can be configured for either 120 or 240 VAC operation by installing the appropriate on-board jumpers. As an option, the builder can use off-board chassis mounted transformers if desired. AC mains wiring, fusing and switching are left as an exercise to the builder.
Each supply is isolated electrically from the others as well as chassis ground, to allow maximum flexibility in connecting to a wide array of vintage radio sets. Each supply is also protected against momentary short circuits to its negative rail. However, care must be taken to prevent voltage-to-voltage shorts.
A representative parts list and fabrication drawing will be sent with the purchase of the PCB. The cost of the additional components is not included, including an enclosure, line cord, fuse, on/off switch and hookup wire.
Full details are available here.
Price: $38 including shipping to USA addresses