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EF Johnson 100 FD 30, 13-99 pF Dual Section Air Variable Capacitor 2200V

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MPN:
100 FD 30
Condition:
Used
Shipping:
$10.00 (Fixed Shipping Cost)
  • Genuine E.F. Johnson 100FD30 dual-section air variable capacitor. Each section approximately 13-99 pF (measured ~15-106 pF), 0.075″ plate spacing, 2200 V peak. Compact Type F design with steatite insulation, aluminum plates, and ¼″ shaft. Ideal for ham radio, antenna tuners, amplifiers, transmitters, and RF projects. Dimensions approx. 9″ L × 2″ W × 2″ H. Classic Waseca, MN quality. Clean used condition. Perfect for restoration or new builds needing reliable dual air-variable capacitance.
  • Genuine E.F. Johnson 100FD30 dual-section air variable capacitor. Each section approximately 13-99 pF (measured ~15-106 pF), 0.075″ plate spacing, 2200 V peak. Compact Type F design with steatite insulation, aluminum plates, and ¼″ shaft. Ideal for ham radio, antenna tuners, amplifiers, transmitters, and RF projects. Dimensions approx. 9″ L × 2″ W × 2″ H. Classic Waseca, MN quality. Clean used condition. Perfect for restoration or new builds needing reliable dual air-variable capacitance.
  • Genuine E.F. Johnson 100FD30 dual-section air variable capacitor. Each section approximately 13-99 pF (measured ~15-106 pF), 0.075″ plate spacing, 2200 V peak. Compact Type F design with steatite insulation, aluminum plates, and ¼″ shaft. Ideal for ham radio, antenna tuners, amplifiers, transmitters, and RF projects. Dimensions approx. 9″ L × 2″ W × 2″ H. Classic Waseca, MN quality. Clean used condition. Perfect for restoration or new builds needing reliable dual air-variable capacitance.
  • Genuine E.F. Johnson 100FD30 dual-section air variable capacitor. Each section approximately 13-99 pF (measured ~15-106 pF), 0.075″ plate spacing, 2200 V peak. Compact Type F design with steatite insulation, aluminum plates, and ¼″ shaft. Ideal for ham radio, antenna tuners, amplifiers, transmitters, and RF projects. Dimensions approx. 9″ L × 2″ W × 2″ H. Classic Waseca, MN quality. Clean used condition. Perfect for restoration or new builds needing reliable dual air-variable capacitance.
  • Genuine E.F. Johnson 100FD30 dual-section air variable capacitor. Each section approximately 13-99 pF (measured ~15-106 pF), 0.075″ plate spacing, 2200 V peak. Compact Type F design with steatite insulation, aluminum plates, and ¼″ shaft. Ideal for ham radio, antenna tuners, amplifiers, transmitters, and RF projects. Dimensions approx. 9″ L × 2″ W × 2″ H. Classic Waseca, MN quality. Clean used condition. Perfect for restoration or new builds needing reliable dual air-variable capacitance.
$27.00
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Description

EF Johnson 100 FD 30, 13-99 pF Dual Section Air Variable Capacitor 2200V

Specifications (from original E.F. Johnson Type F dual-section catalog data, Cat. No. 155-508)
  • Manufacturer: E.F. Johnson Co., Waseca, Minn., U.S.A.
  • Model / Type: 100FD30 (Type F dual section)
  • Sections: Dual (can be used independently or paralleled)
  • Capacitance per section: Min. ~13 pF, Max. ~99 pF (your measured 15–106 pF is consistent with used units)
  • Plate spacing: 0.075″
  • Plates per section: 25
  • Peak voltage rating: 2200 V
  • Shaft: ¼″ diameter stainless steel (with typical rear extension)
  • Dimensions (your measurements align with Type F dual): Length ~9″ overall, Width ~2″, Height ~2″ (catalog body length ~7 7/16″ excluding shafts/mounts; panel space ~2″ × 2-1/16″)
  • Construction: Aluminum plates (.032″ thick with rounded edges), heavy aluminum end frames with ¼″ aluminum tie rods, dense molded steatite insulators, cadmium-plated phosphor-bronze rotor contacts. Compact design optimized for high capacity-to-volume ratio, rigidity, and low losses in medium/low-power RF applications (transmitters, tuners, amplifiers).
This is a classic Type F dual-section unit, slightly more compact than the Type E series.
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