WWII Signal Corps Rectifier Power Unit RA-133 – Phoenix Electronics

WWII Signal Corps Rectifier Power Unit RA-133 – Phoenix Electronics – Aircraft Radio Power Supply

Original WWII U.S. Army Signal Corps Rectifier Power Unit RA-133 manufactured by Phoenix Electronics, Inc. under Signal Corps contract Order No. 9090-PHILA-46-02. This compact power supply unit was designed to provide operating voltages for military communications and radio equipment and retains its original tubes, capacitors, controls, fuse, and attached power cable.

The identification plate is clearly marked:

• Signal Corps, U.S. Army
• Rectifier Power Unit RA-133
• Phoenix Electronics, Inc.
• Order No. 9090-PHILA-46-02
• Serial Number 979

The front panel is marked for:

• 6.3V AC
• 125V DC
• A+, A-, B-, B+ terminals
• Fuse protection

The unit retains two original vacuum tubes, large filter capacitors, military wiring, original fuse assembly, and attached control cable. Its compact size and complete appearance make it an attractive display piece for collectors of WWII communications equipment, Signal Corps electronics, and military radio gear.

RA-series power units were essential support equipment for military communications systems, converting and regulating power for field and airborne electronic equipment. Original examples with intact data plates and tube complement are becoming increasingly difficult to locate.

Condition

• Original WWII military communications power supply
• Untested and sold as a historical collectible
• Original finish with expected age and storage wear
• Data plate remains clear and legible
• Original vacuum tubes, capacitors, fuse, and wiring present
• Attached control cable included
• No restoration noted
• Please review photographs carefully for condition details

Collector Interest

Ideal for:

• WWII Signal Corps collectors
• Military radio collectors
• Vacuum tube enthusiasts
• Aircraft communications collections
• Museum displays
• Military electronics restoration projects

A scarce and highly displayable WWII-era Signal Corps power supply unit retaining excellent visual appeal.