This listing is for a vintage Motorola Precision Selector Cavity, Model TU-524H, manufactured in Chicago, Illinois under Patent No. 2,637,782. This high-quality RF cavity filter was used in early radio communication and repeater systems. It’s designed for precision frequency selection and signal conditioning within RF circuits—commonly used in two-way radio base stations.

Condition:

• Good overall vintage condition

• Shows light wear consistent with age

• Adjustment hardware moves smoothly

• Connectors appear intact (see detailed photos)

• Untested and sold as-is

Specifications:

• Manufacturer: Motorola Inc., Chicago, Illinois

• Model: TU-524H

• Type: Precision Selector Cavity / RF Filter

• Patent: 2,637,782

• Construction: Heavy-duty steel enclosure with tuning knob and precision couplers

• Approx. Dimensions: 20” height × 7” diameter

• Approx. Weight: 15 lbs

What’s Included:

• (1) Motorola TU-524H Precision Selector Cavity (as shown)

Notes:
This unit is ideal for collectors, restorers, or radio enthusiasts interested in vintage Motorola communications hardware. The unit has not been powered or tested for operation.

Shipping:
Ships well-packed and fully insured. Local pickup available in Seattle, WA area.

---

Search Keywords:
Motorola cavity filter, TU-524H, RF duplexer, repeater filter, Motorola communications, VHF UHF filter, vintage radio equipment, Motorola Chicago, precision RF cavity.