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National Model 100, 8-120 pF 3000V Dual Section Air Variable Capacitor

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MPN:
100
Condition:
Used
Shipping:
$8.00 (Fixed Shipping Cost)
  • National dual-section air variable capacitor marked 100. Approximately 8–120 pF per section at 3000 V peak with ~1/16″ plate spacing. Classic USA-made National Radio transmitting-style unit with 1/4″ shaft, ideal for HF amplifiers, balanced circuits, antenna tuners, or vintage radio restoration. Measures about 6″ long. Excellent condition for age. Perfect for ham radio builders seeking authentic National dual-section capacitors.
  • National dual-section air variable capacitor marked 100. Approximately 8–120 pF per section at 3000 V peak with ~1/16″ plate spacing. Classic USA-made National Radio transmitting-style unit with 1/4″ shaft, ideal for HF amplifiers, balanced circuits, antenna tuners, or vintage radio restoration. Measures about 6″ long. Excellent condition for age. Perfect for ham radio builders seeking authentic National dual-section capacitors.
  • National dual-section air variable capacitor marked 100. Approximately 8–120 pF per section at 3000 V peak with ~1/16″ plate spacing. Classic USA-made National Radio transmitting-style unit with 1/4″ shaft, ideal for HF amplifiers, balanced circuits, antenna tuners, or vintage radio restoration. Measures about 6″ long. Excellent condition for age. Perfect for ham radio builders seeking authentic National dual-section capacitors.
  • National dual-section air variable capacitor marked 100. Approximately 8–120 pF per section at 3000 V peak with ~1/16″ plate spacing. Classic USA-made National Radio transmitting-style unit with 1/4″ shaft, ideal for HF amplifiers, balanced circuits, antenna tuners, or vintage radio restoration. Measures about 6″ long. Excellent condition for age. Perfect for ham radio builders seeking authentic National dual-section capacitors.
$24.99
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Description

National Model 100, 8-120 pF 3000V Dual Section Air Variable Capacitor

Key Specifications:
  • Capacitance: Approximately 8–120 pF and 8–115 pF per section (your measurements). Closely matches the National TMC-100D rating of 11–100 pF per section (minor variation is common due to condition or measurement).
  • Voltage rating: 3000 V peak.
  • Air gap / plate spacing: Approximately 0.077″ (catalog) / your ~1/16″ measurement.
  • Plates: Typically 13 per section.
  • Shaft: 1/4″ diameter (often ~1.5″ long).
  • Dimensions: Approximately 6–6.5″ long × ~2.1–3.5″ wide × ~2.4–2.75″ high (matches your 6″ × 2⅛″ × 2¾″ closely).
  • Construction: Dual section (common rotor, independent stators), ceramic end plates/insulators, “100” stamped on ceramic, National branding. High-quality double-bearing style typical of National Radio Company / National Radio Products transmitting variables.
These are classic National dual-section air variables designed for RF transmitting and tuning applications.
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