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EF Johnson 100 E 45, 17-100 pF, 3000 Volt Single Section Air Variable Capacitor

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MPN:
100 E 45
Condition:
Used
Shipping:
$10.00 (Fixed Shipping Cost)
  • EF Johnson 100E45 (17-100 pF) Single Section Air Variable Capacitor. Genuine E.F. Johnson compact Type E single air variable ideal for ham radio transmitters, amplifiers, and antenna tuners. Rugged aluminum construction with steatite insulation, approx. 6¾″ L × 2⅝″ W × 2⅝″ H, ¼″ shaft, ~0.045″ plate spacing. Clean used condition. Perfect for vintage restoration or medium-power RF projects. Nationwide Radio & Eq. Sales – ke9pq.com
  • EF Johnson 100E45 (17-100 pF) Single Section Air Variable Capacitor. Genuine E.F. Johnson compact Type E single air variable ideal for ham radio transmitters, amplifiers, and antenna tuners. Rugged aluminum construction with steatite insulation, approx. 6¾″ L × 2⅝″ W × 2⅝″ H, ¼″ shaft, ~0.045″ plate spacing. Clean used condition. Perfect for vintage restoration or medium-power RF projects. Nationwide Radio & Eq. Sales – ke9pq.com
  • EF Johnson 100E45 (17-100 pF) Single Section Air Variable Capacitor. Genuine E.F. Johnson compact Type E single air variable ideal for ham radio transmitters, amplifiers, and antenna tuners. Rugged aluminum construction with steatite insulation, approx. 6¾″ L × 2⅝″ W × 2⅝″ H, ¼″ shaft, ~0.045″ plate spacing. Clean used condition. Perfect for vintage restoration or medium-power RF projects. Nationwide Radio & Eq. Sales – ke9pq.com
  • EF Johnson 100E45 (17-100 pF) Single Section Air Variable Capacitor. Genuine E.F. Johnson compact Type E single air variable ideal for ham radio transmitters, amplifiers, and antenna tuners. Rugged aluminum construction with steatite insulation, approx. 6¾″ L × 2⅝″ W × 2⅝″ H, ¼″ shaft, ~0.045″ plate spacing. Clean used condition. Perfect for vintage restoration or medium-power RF projects. Nationwide Radio & Eq. Sales – ke9pq.com
  • EF Johnson 100E45 (17-100 pF) Single Section Air Variable Capacitor. Genuine E.F. Johnson compact Type E single air variable ideal for ham radio transmitters, amplifiers, and antenna tuners. Rugged aluminum construction with steatite insulation, approx. 6¾″ L × 2⅝″ W × 2⅝″ H, ¼″ shaft, ~0.045″ plate spacing. Clean used condition. Perfect for vintage restoration or medium-power RF projects. Nationwide Radio & Eq. Sales – ke9pq.com
$19.99
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Description

EF Johnson 100 E 45, 17-100 pF, 3000 Volt Single Section Air Variable Capacitor

Specifications & Information Genuine
E.F. Johnson Co. (Waseca, MN) single-section air-variable capacitor, Type/Cat. No. 100E45. measured / stated specs:
  • Sections: 1
  • Capacitance: 17–100 pF
  • Dimensions: Length 6¾″, Width 2⅝″, Height 2⅝″
  • Shaft: ¼″ diameter
Catalog correlation & additional specifications:
This is a Type E-series compact single-section unit. Published values for the 100E45 are typically around 15–100 pF or 16–101 pF (your measured 17–100 pF is an excellent match). Plate spacing / air gap: Approximately 0.045″. Voltage rating: Approximately 2,000–3,000 V peak (related dual-section 100ED45 versions are rated 4,500 V; single-section Type E units of this size and spacing are commonly in the 2–3 kV range). Construction: Aluminum plates with rounded edges, heavy aluminum end frames and tie rods, dense molded steatite (ceramic) insulators, and a ¼″ shaft. Designed for medium-power RF service in transmitters, amplifiers, antenna tuners, and other ham-radio applications where a compact, high-Q variable is needed.
 
 Clean used. Free-turning shaft, good plate meshing, and intact steatite end pieces visible in the photos. Nameplate clearly reads 100E45.
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