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Hammarlund Model C-6558, 22 to 454 pF 1000 Volt Single Section Air Variable Capacitor

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MPN:
C-6558
Condition:
Used
Shipping:
$8.00 (Fixed Shipping Cost)
  • Vintage Hammarlund C-6558 single-section air variable capacitor, 22–454 pF, approximately 1000 V peak rating. Compact USA-made multi-plate design with ~1/64-inch plate spacing and 1/4-inch shaft. Measures about 4 × 1-3/4 × 1-3/4 inches. Ideal for amateur radio receivers, restoration projects, or RF tuning applications needing a reliable high-capacitance component in a small frame.
  • Vintage Hammarlund C-6558 single-section air variable capacitor, 22–454 pF, approximately 1000 V peak rating. Compact USA-made multi-plate design with ~1/64-inch plate spacing and 1/4-inch shaft. Measures about 4 × 1-3/4 × 1-3/4 inches. Ideal for amateur radio receivers, restoration projects, or RF tuning applications needing a reliable high-capacitance component in a small frame.
  • Vintage Hammarlund C-6558 single-section air variable capacitor, 22–454 pF, approximately 1000 V peak rating. Compact USA-made multi-plate design with ~1/64-inch plate spacing and 1/4-inch shaft. Measures about 4 × 1-3/4 × 1-3/4 inches. Ideal for amateur radio receivers, restoration projects, or RF tuning applications needing a reliable high-capacitance component in a small frame.
  • Vintage Hammarlund C-6558 single-section air variable capacitor, 22–454 pF, approximately 1000 V peak rating. Compact USA-made multi-plate design with ~1/64-inch plate spacing and 1/4-inch shaft. Measures about 4 × 1-3/4 × 1-3/4 inches. Ideal for amateur radio receivers, restoration projects, or RF tuning applications needing a reliable high-capacitance component in a small frame.
$24.99
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Description

Hammarlund Model C-6558, 22 to 454 pF 1000 Volt Single Section Air Variable Capacitor

Key Specifications:
  • Brand: Hammarlund Manufacturing Co. (N.Y.)
  • Model: C-6558 (also seen marked SC-655826 in Signal Corps versions; last digits may vary)
  • Sections: 1 (single-section)
  • Capacitance: 22 pF minimum to 454 pF maximum (commonly associated with ~450 pF nominal units)
  • Plate spacing: Approximately 1/64 in (0.0156 in)
  • Estimated voltage rating: ~1000 V peak (standard ARRL Handbook guideline for ~0.015 in air-gap spacing; practical RF rating for receiving/low-power use)
  • Shaft: 1/4 in diameter
  • Dimensions (approx.): Length 4 in, Width 1-3/4 in, Height 1-3/4 in
  • Construction: Compact Hammarlund multi-plate air-dielectric design with metal frame, ceramic insulators, and numerous closely spaced plates for higher capacitance in a small package. Typical of RMC or similar rugged military/commercial series.
Exact original factory voltage data for this specific marking was not located; the rating is derived from measured plate spacing. These were used in tuning circuits of vintage radios and Signal Corps equipment.
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