CDR Antenna Rotor Control Box

The product pictured is a vintage CDR antenna rotor control box, specifically a model likely associated with the 'Ham-M' or 'TR' series. These devices were used to remotely rotate directional radio or television antennas to improve signal reception.

The CDR brand was a joint venture between the Cornell-Dubilier Electric Corp. and the Radiart Corp. during the mid-20th century. Production was historically based in the United States, particularly known for its heavy-duty mechanical engineering. Over time, the antenna rotor business changed hands as the industry shifted. Today, the lineage of these specific rotor designs is primarily owned and maintained by MFJ Enterprises, Inc., which continues to produce and support Hy-Gain branded rotors that evolved from the original CDR designs.