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Cardwell Model 429-8, 20-143 pF 1000V Single Section Air Variable Capacitor

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MPN:
429-8
Condition:
Used
Shipping:
$8.00 (Fixed Shipping Cost)
  • Vintage Cardwell 429-8 single-section air variable capacitor, 20–143 pF, approximately 1500 V peak rating. Classic USA-made multi-plate design with 1/4-inch shaft, ~1/32-inch plate spacing, and sturdy metal frame. Ideal for amateur radio transmitters, receivers, antenna tuners, or restoration projects. Measures about 4-3/4 × 3 × 2-1/4 inches. Solid condition for its age—perfect for ham radio builders seeking reliable RF tuning components.
  • Vintage Cardwell 429-8 single-section air variable capacitor, 20–143 pF, approximately 1500 V peak rating. Classic USA-made multi-plate design with 1/4-inch shaft, ~1/32-inch plate spacing, and sturdy metal frame. Ideal for amateur radio transmitters, receivers, antenna tuners, or restoration projects. Measures about 4-3/4 × 3 × 2-1/4 inches. Solid condition for its age—perfect for ham radio builders seeking reliable RF tuning components.
  • Vintage Cardwell 429-8 single-section air variable capacitor, 20–143 pF, approximately 1500 V peak rating. Classic USA-made multi-plate design with 1/4-inch shaft, ~1/32-inch plate spacing, and sturdy metal frame. Ideal for amateur radio transmitters, receivers, antenna tuners, or restoration projects. Measures about 4-3/4 × 3 × 2-1/4 inches. Solid condition for its age—perfect for ham radio builders seeking reliable RF tuning components.
  • Vintage Cardwell 429-8 single-section air variable capacitor, 20–143 pF, approximately 1500 V peak rating. Classic USA-made multi-plate design with 1/4-inch shaft, ~1/32-inch plate spacing, and sturdy metal frame. Ideal for amateur radio transmitters, receivers, antenna tuners, or restoration projects. Measures about 4-3/4 × 3 × 2-1/4 inches. Solid condition for its age—perfect for ham radio builders seeking reliable RF tuning components.
$24.99
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Description

Cardwell Model 429-8, 20-143 pF 1000V Single Section Air Variable Capacitor

Cardwell 429-8 20 to 143 pF 1500 Volt Single Section Air Variable CapacitorKey Specifications (based on the unit markings, your measurements, and standard air-variable ratings):
  • Manufacturer: Cardwell (Made in USA; U.S. Patent 1826331 stamped)
  • Model: 429-8
  • Sections: 1 (single-section)
  • Capacitance: 20 pF minimum to 143 pF maximum
  • Plate spacing: Approximately 1/32 in (0.031 in)
  • Estimated voltage rating: ~1500 V peak (typical ARRL Handbook guideline for ~0.03 in air-gap spacing; conservative practical rating for RF use)
  • Shaft: 1/4 in diameter
  • Dimensions (approx.): Length 4-3/4 in, Width 3 in, Height 2-1/4 in
  • Construction: Classic multi-plate air dielectric design with metal end frames, rotor/stator plates, and mounting feet
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