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Barker & Williamson (B&W) 15 JVL, 15 Meter Plug in Band Coil NOS in Box #2

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JVL
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Barker & Williamson (B&W) 15 JVL, 15 Meter Plug in Band Coil NOS in Box #2

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This NOS coil has the cross support repaired on each end with epoxy as it was cracked from age. It is now solid.
 
The B&W JVL Series (Barker & Williamson JVL Series) refers to vintage plug-in "Junior" variable link (or similar) band coils, used primarily in amateur radio (ham) transmitters, receivers, or tank circuits from the mid-20th century era. These are plug-in air-wound inductors with ceramic bases, designed for band-changing in HF (high frequency) applications. The "JVL" designation typically indicates a "Junior Variable Link" type coil, often with a fixed or adjustable link coupling for impedance matching or oscillator/buffer stages.They are part of B&W's broader lineup of plug-in coils (e.g., alongside BVL for larger "Bandspread Variable Link," TVL, HDVL for heavy-duty variable link, BCL, etc.). The JVL series appears to be a lower-power or "junior" variant, often with banana plugs for socket mounting and suited for up to around 100W in some applications (though exact ratings vary by model and use).Known Models in the JVL SeriesFrom vintage listings, sales, and ham radio references, the series covers standard amateur bands with numbering indicating the primary band (e.g., meters). Common ones include:
  • 10 JVL — For 10-meter band (28-29.7 MHz). Often features a dual-coil setup (two main coils end-to-end with a coupling coil in between) for tuning/link. Frequently seen as NOS (new old stock) on ceramic bases.
  • Other likely/probable variants (based on similar B&W Junior series patterns like JCL/JEL/BVL):
    • 80 JVL or similar for 80-meter band (3.5-4 MHz)
    • 40 JVL for 40-meter band (7 MHz)
    • 20 JVL for 20-meter band (14 MHz)
    • Possibly 160 JVL for 160-meter band (1.8-2 MHz), though lower bands more often used BVL/HDVL types.
The exact full list isn't documented in a single modern catalog (B&W's current site focuses on modern Miniductor/Airdux coils), but sales and ham forums show 10 JVL as the most commonly referenced/sold in the JVL line. The series seems limited compared to the more common BVL or BCL plug-in sets.General Information on JVL Series Coils
  • Construction: Air-wound with tinned copper wire on ceramic form/base, plug-in banana jacks/plugs for easy band switching. Often include a variable or fixed link winding for coupling to antenna/tank circuits.
  • Purpose: Used in oscillator, buffer-doubler, final amplifier stages, or as tank coils for impedance matching (e.g., up to 600 ohms in related series).
  • Power Handling: Typically lower power (e.g., up to 100W in Type "B" applications per similar B&W docs; higher in some setups).
  • Features: High Q, good stability; some have internal variable links or external series options for matching.
  • Availability: Mostly vintage/NOS items on eBay, Etsy, surplus sites. Prices range from $50–$100+ for good/excellent condition or NOS examples (e.g., 10 JVL often around $80–$90).
If you're looking for a specific band/model, restoration, or specs for a particular one (e.g., inductance, turns), provide more details—I can dig deeper or suggest equivalents from modern B&W stock. These are classic pieces for vintage ham gear restoration!
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