Gates

Roller Inductor 0.15 to 29 uH with Ceramic Coil Form in Excellent Condition

Write a Review

SKU:
UPC:
MPN:: 938-0505-001
Condition:: Used
Shipping:: $16.00 (Fixed Shipping Cost)

$74.99

Current Stock:

Quantity:

Frequently bought together:

Description

Description

Roller Inductor 0.15 to 29 uH with Ceramic Coil Form in Excellent Condition

This is a compact vintage roller inductor (variable RF coil), most likely commercial or military surplus from a maker in the E.F. Johnson, Barker & Williamson (B&W), Gates, Harris, or similar class (or an unlabeled high-quality surplus equivalent). Exact brand ID is difficult without visible markings, but the silver-plated coil, single roller contact, ceramic coupler, and overall construction are typical of mid-20th-century HF transmitting and antenna-matching components.

Key Specs & Features

Inductance range: 0.15 – 29 µH (wide range useful for HF antenna tuners, covering roughly 160–10 meters with suitable capacitors).
Dimensions: Approx. 7″ long × 3″ wide × 4½″ high.
Construction: Silver-plated coil turns on a white ceramic (or ceramic-like) form; dark end frames/plates (phenolic or painted metal); single roller contact that rides the coil; ceramic coupler accepting a 3/16″ shaft (somewhat less common than the usual ¼″).
Other notes: Compact size makes it suitable for smaller tuners or amplifiers. Air-core design for good Q. Power handling for this size is typically a few hundred watts (exact rating depends on frequency, duty cycle, and cooling—common in amateur and commercial HF service).

These units were commonly used in antenna tuners, transmitters, and impedance-matching networks.

Vintage Compact Roller Inductor – 0.15 to 29 µHNice compact roller inductor measuring approximately 7″ long × 3″ wide × 4½″ high. Inductance range 0.15–29 µH. Features a silver-plated coil, single roller contact, and a ceramic coupler that accepts a 3/16″ shaft. Solid construction with dark end frames and white ceramic form. Excellent for HF antenna tuners, matching networks, or amplifiers where space is limited. Smooth roller action when cleaned and lubricated. Ideal for amateur or commercial HF projects. Ready for your next build.

View AllClose