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Hammarlund Model M457, Dual Section 18-276 pF Each, Air Variable Capacitor

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MPN:
M457
Condition:
Used
Shipping:
$8.00 (Fixed Shipping Cost)
  • Vintage Hammarlund M457 dual-section air variable capacitor, 18–276 pF per section. Original Hammarlund Mfg. Co. construction with 1/64-inch plate spacing, 1/4-inch shaft, aluminum frame and ceramic insulators. Measures approximately 5½" long × 3¼" wide × 2" high. Approximately 1000 V peak rating based on air gap. Ideal for classic radio restoration, HF receivers, low-power transmitters, antenna tuners, or experimental RF projects. Smooth dual-bearing rotation, solder terminals on both sections. Excellent condition used part from a trusted source of vintage radio components. Perfect for boat-anchor builders and collectors seeking authentic Hammarlund quality.
  • Vintage Hammarlund M457 dual-section air variable capacitor, 18–276 pF per section. Original Hammarlund Mfg. Co. construction with 1/64-inch plate spacing, 1/4-inch shaft, aluminum frame and ceramic insulators. Measures approximately 5½" long × 3¼" wide × 2" high. Approximately 1000 V peak rating based on air gap. Ideal for classic radio restoration, HF receivers, low-power transmitters, antenna tuners, or experimental RF projects. Smooth dual-bearing rotation, solder terminals on both sections. Excellent condition used part from a trusted source of vintage radio components. Perfect for boat-anchor builders and collectors seeking authentic Hammarlund quality.
  • Vintage Hammarlund M457 dual-section air variable capacitor, 18–276 pF per section. Original Hammarlund Mfg. Co. construction with 1/64-inch plate spacing, 1/4-inch shaft, aluminum frame and ceramic insulators. Measures approximately 5½" long × 3¼" wide × 2" high. Approximately 1000 V peak rating based on air gap. Ideal for classic radio restoration, HF receivers, low-power transmitters, antenna tuners, or experimental RF projects. Smooth dual-bearing rotation, solder terminals on both sections. Excellent condition used part from a trusted source of vintage radio components. Perfect for boat-anchor builders and collectors seeking authentic Hammarlund quality.
  • Vintage Hammarlund M457 dual-section air variable capacitor, 18–276 pF per section. Original Hammarlund Mfg. Co. construction with 1/64-inch plate spacing, 1/4-inch shaft, aluminum frame and ceramic insulators. Measures approximately 5½" long × 3¼" wide × 2" high. Approximately 1000 V peak rating based on air gap. Ideal for classic radio restoration, HF receivers, low-power transmitters, antenna tuners, or experimental RF projects. Smooth dual-bearing rotation, solder terminals on both sections. Excellent condition used part from a trusted source of vintage radio components. Perfect for boat-anchor builders and collectors seeking authentic Hammarlund quality.
$24.99
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Description

Hammarlund Model M457, Dual Section 18-276 pF Each, Air Variable Capacitor

Key Specifications & Information
  • Manufacturer: Hammarlund Mfg. Co. Inc. (New York, U.S.A.)
  • Model / Marking: M457 (also appears as M-457 / F1-457 on the frame)
  • Type: Dual-section (2-gang) air dielectric variable capacitor
  • Capacitance (each section): 18 pF minimum to 276 pF maximum
  • Plate spacing: 1/64 inch (≈ 0.0156 inch)
  • Shaft: 1/4-inch diameter
  • Dimensions: Length 5½ inches, Width 3¼ inches, Height 2 inches
  • Construction: Aluminum frame and plates, ceramic (steatite-type) insulators, solder terminals on both sections, dual bearings for smooth rotation
Voltage Rating: Approximately 1000 V peak (based on the 1/64-inch air gap). Close-spaced plates of this size are typically rated in the 600–1000 V range for receiving or low-to-medium power RF use. Exact factory peak or RMS rating for this specific part number is not published in standard catalogs, but the spacing aligns with common Hammarlund receiving-type dual-section capacitors. This is a classic Hammarlund dual-section tuning capacitor suitable for receivers, transmitters (low-to-medium power), antenna tuners, or experimental RF projects.
 
 
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