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Harris / Multronics Heavy Duty Mil-Spec 1.6 to 35 uH Silver-Plated Roller Inductor #2

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MPN:
755017A
Condition:
Used
Shipping:
$16.00 (Fixed Shipping Cost)
  • Harris-style green plastic frame roller inductor, 1.6–35 µH, silver-plated flat ribbon coil with double internal contacts, ¼″ shaft. Ideal for HF antenna tuners & amplifiers.
  • Harris-style green plastic frame roller inductor, 1.6–35 µH, silver-plated flat ribbon coil with double internal contacts, ¼″ shaft. Ideal for HF antenna tuners & amplifiers.
  • Harris-style green plastic frame roller inductor, 1.6–35 µH, silver-plated flat ribbon coil with double internal contacts, ¼″ shaft. Ideal for HF antenna tuners & amplifiers.
  • Harris-style green plastic frame roller inductor, 1.6–35 µH, silver-plated flat ribbon coil with double internal contacts, ¼″ shaft. Ideal for HF antenna tuners & amplifiers.
$124.99
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Description

 Harris / Multronics Heavy Duty Mil-Spec 1.6 to 35 uH Silver-Plated Roller Inductor #1

 This unit is in excellent condition. When I received it, one of the 4 coil form spreader bars had a hairline crack towards one end. I was able to remove it and repair it with JB Weld and it is now bonded very well. There is not a lot of stress on this piece and serves as the coil spacing guide. 

Up for sale is a premium, military-grade Harris / Multronics variable roller inductor. Perfect for custom-built high-power HF linear amplifiers, antenna couplers, or matching networks. 
This unit is built to last, featuring a heavy silver-plated flat copper ribbon coil supported by rugged, high-isolation green structural endplates. A dual-contact silver wiper mechanism rides smoothly inside the coil for optimal electrical contact and low resistance. 
  • Specs: 1.6 to 35 µH inductance, 1/4" control shaft.
  • Dimensions: Compact 6-1/4" L x 4-1/4" W x 4-1/4" H footprint.
  • Condition: Excellent condition with clean, intact silver plating and seamless mechanical tracking. 
Don’t miss out on this high-end component for your next ham radio shack project!
This is a Harris (or Harris-family / military surplus) roller inductor with the distinctive green plastic (Delrin-like) frame. RF Parts explicitly describes the Harris military units (example: 755017A4530, 18 µH) as having frames that are either black or green, heavy silver-plated flat ribbon coil (typically ~0.25″ × 0.040″), and dual wipers/contacts (one on each side of the ribbon) that ride on the inside of the coil
 
Specs & Information
  • Inductance range: 1.6–35 µH (measured; continuous variable via roller)
  • Coil: Air-wound, flat ribbon, silver-plated
  • Contacts: Double silver-plated wipers contacting the ribbon from the inside of the coil
  • Shaft: ¼″ diameter
  • Frame/body: Green-colored plastic (Delrin or similar high-strength insulating material) end plates and structure with black support rods
  • Dimensions: Approx. 6¼″ long × 4¼″ wide × 4¼″ high (matches your measurements)
  • Typical current rating (comparable units): 5–10 A range (exact rating depends on ribbon cross-section; these are medium-to-high power capable)
  • Construction notes: Open-frame design optimized for HF antenna tuners, matching networks, and amplifiers. High-Q air-core style. Military-origin units were built for reliability under RF voltage/current stress.
These appear in surplus from Harris (FSCM 14304 and related), sometimes rebranded or cross-referenced under various NSNs. They were used in military and commercial RF equipment.
 
 
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