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EF Johnson 153-506 / Type 150DD45 Air Variable Capacitor Dual 150 pF Sections, 4,000 Volt

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MPN:
153-506
Condition:
Used
Shipping:
$20.00 (Fixed Shipping Cost)
  • EF Johnson dual-section air variable capacitor, 28-150 pF each @ 4500 V. Rugged Type D (likely 153-506/150DD45), ¼" shaft, ~11×4.25×4". Ideal for ham radio amplifiers & tuners. Vintage surplus.
  • EF Johnson dual-section air variable capacitor, 28-150 pF each @ 4500 V. Rugged Type D (likely 153-506/150DD45), ¼" shaft, ~11×4.25×4". Ideal for ham radio amplifiers & tuners. Vintage surplus.
  • EF Johnson dual-section air variable capacitor, 28-150 pF each @ 4500 V. Rugged Type D (likely 153-506/150DD45), ¼" shaft, ~11×4.25×4". Ideal for ham radio amplifiers & tuners. Vintage surplus.
  • EF Johnson dual-section air variable capacitor, 28-150 pF each @ 4500 V. Rugged Type D (likely 153-506/150DD45), ¼" shaft, ~11×4.25×4". Ideal for ham radio amplifiers & tuners. Vintage surplus.
  • EF Johnson dual-section air variable capacitor, 28-150 pF each @ 4500 V. Rugged Type D (likely 153-506/150DD45), ¼" shaft, ~11×4.25×4". Ideal for ham radio amplifiers & tuners. Vintage surplus.
  • EF Johnson dual-section air variable capacitor, 28-150 pF each @ 4500 V. Rugged Type D (likely 153-506/150DD45), ¼" shaft, ~11×4.25×4". Ideal for ham radio amplifiers & tuners. Vintage surplus.
$59.99
Frequently bought together:

Description

EF Johnson 153-506 / Type 150DD45 Air Variable Capacitor Dual 150 pF Sections, 4,000 Volt, in Excellent Condition.

E.F. Johnson dual-section air variable (likely catalog 153-506 / Type 150DD45). Each section 28–150 pF, 4500 V rating, ¼" shaft, approximate size 11" L × 4¼" W × 4" H. Rugged construction for high-power RF use—perfect for ham radio linear amplifiers, antenna tuners, or matching networks. Smooth operation, classic mid-century Johnson quality from the Waseca, MN maker of Viking transmitters and pro RF parts. Clean used condition. Ideal upgrade or replacement for serious operators.

 

Key specifications 
  • Dual (2) electrically isolated sections, mechanically ganged on one shaft.
  • Capacitance: ~28–150 pF per section (catalog ~24–155 pF).
  • Voltage rating: 4500 V (peak/withstanding; air-gap dielectric).
  • Shaft: ¼ inch (typically extends both ends on these).
  • Air gap / plate spacing: ~0.125" (consistent with 4500 V rating).
  • Dimensions: ~11" L × 4¼" W × 4" H (body typically ~10½"; end frames aluminum, steatite insulators, aluminum plates).
  • Construction: Rugged Type D style for medium-to-higher power RF use (transmitters, amplifiers, antenna tuners). Mounting brackets usually provided or available for normal/inverted mounting.
  • Typical use: Ham radio linear amplifiers, high-power tuners, matching networks.

 

NOTE: This dual section capacitor has a Rod switch to combine the two sections for a total of 300 pF.

 This switch can be removed if desired.

 

 

 

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