Vintage General Electric PortoLab 4EXT122 Portable Radio Test Set Polytron Res

  

Vintage General Electric PortoLab 4EXT122 Portable Test Set Manufactured by Polytron Research Inc. This is a vintage portable test instrument designed for use in servicing and calibrating two-way radio communication systems.

Units like this were used by technicians in the field to test transmitters, receivers, and control heads for General Electric and other commercial radio systems. The unit is housed in a rugged black carry case with red control knobs, analog gauge, and multiple connection ports RF Input, Load Bank, Control Head, etc. The front data plate reads.

PortoLab - Made for General Electric by Polytron Research Inc. Rockville, Maryland - Model 4EXT122 - Serial No. Physical condition: Good overall for its age. The case shows expected wear, scuffs, and minor surface rust on hardware.

Interior condition: Appears complete with all controls and meter intact. Functionality: Untested - I do not have the means to power or calibrate it. No accessories or manuals included beyond what is shown in the photos. Brand: General Electric / Polytron Research.

Type: Portable Radio Test Set. Country of Manufacture: United States. Power: AC (cord included, untested). Dimensions: 14" W × 11" D × 7 H. Collectors of vintage radio communication and test gear.

Electronics display or museum collections. Please review all photos closely - what you see is exactly what you'll receive. This is a rare find and a beautiful example of mid-century communications testing technology.