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Barker & Williamson (B&W) Model 3266 BVL Ceramic Base & Swinging Link Arm & Coil New in Box

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3266
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  • Barker & Williamson (B&W) Model 3266 BVL Ceramic Base & Swinging Link Arm & Coil New in Box
  • Barker & Williamson (B&W) Model 3266 BVL Ceramic Base & Swinging Link Arm & Coil New in Box
$34.99
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Description

Barker & Williamson (B&W) Model 3266 BVL Ceramic Base & Swinging Link Arm & Coil New in Box

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The B&W (Barker & Williamson) Stock No. 3266 is a vintage accessory part from their mid-20th century amateur radio lineup, specifically a Jack Bar and Swinging Link assembly designed for use with certain plug-in inductors (band coils or tank coils).Key Details
  • Description: Jack Bar (a steatite or insulating bar with mounting hardware) combined with a swinging link mechanism. The swinging link is an adjustable or pivotable coupling loop (link coil) that allows variable inductive coupling between the main tank coil and the antenna/grid circuit for impedance matching, loading control, or reducing harmonic radiation in transmitters.
  • Compatibility: Primarily for BVL series inductors (Bandspread Variable Link types), as noted in old B&W catalogs and price lists (e.g., Walter Ashe 1955 catalog and AMfone forum archives referencing B&W parts). It mounts to or integrates with the coil form to provide adjustable link positioning. Some references also tie it to end- or center-link type inductors (old Type A56 equivalents) or HDVL (Heavy Duty Variable Link) variants in related assemblies.
  • Purpose: Enables fine-tuning of coupling in plug-in coil systems for multi-band HF transmitters or amplifiers. Common in 1940s–1960s ham gear for efficient power transfer and matching to 50–600 ohm loads or antenna systems.
  • Power/Use Context: Suited for medium-power setups (e.g., up to 500W input in related BVL/HDVL coils per era catalogs). Not a standalone coil but an add-on for enhancing variable link functionality on compatible B&W plug-ins.
  • Pricing/Availability (Historical): Listed around $3.06 in old catalogs (e.g., mid-1950s pricing). Today, it's rare vintage surplus/NOS—occasionally appears in lots with other B&W parts on eBay, hamfests, or surplus sites, often $10–$50 depending on condition (complete assembly vs. partial).
  • Related Items: Often grouped with parts like Stock No. 3721 (Jack Bar Assembly for HD/HDCL inductors) or similar swinging link kits for other series (e.g., BCL, TVL).
This is a niche restoration part for vintage ham radio enthusiasts rebuilding or maintaining plug-in coil-based transmitters (e.g., Johnson Viking, homebrew finals). Modern B&W coils (Miniductor/Airdux) don't use this plug-in/swinging link system. 
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