G3YNH info: Variable inductors used in HF antenna matching networks.
229-201-1 Cardwell 10uh Roller Inductor, Used
Exponentially switchable coil
Transmitting Variable Inductors
E.F Johnson Roller Inductor 229-201 0 - 10 uH / 3 AMP | eBay
Roller Inductor 0.1-5uH 40kv 0.5-30Mhz Silver Plated Graphite Body
Amazon.com: MFJ-962E MFJ962E MFJ-962 Original MFJ Enterprises 1.8-30 MHz Versa Tuner III AirCore Roller Inductor Antenna Tuner - Handles 1500 Watts PEP SSB Amplifier Input Power (Replaces MFJ-962D : Electronics
Unusual Variable Inductor - Forum - Passive Components - element14 Community
229-201 Johnson Roller Inductor with Gear 10uh (Pull)
Rolling Inductor 150Watts 150uH high speed adjustable inductor
Unknown Roller Inductor Very Nicely Made for Homebrew DIY Transmitter/Tuner | eBay
hamtech
RI-32 32µH Roller Inductor 3.5" x 3.75" x 6 3/8": Palstar.com
N4ZOU's Variable Inductor Design
Cone-shaped roller inductor
Roller inductor making - YouTube
roller-inductor
16 uH High Quality, Commercial Silver Plated Roller Inductor (Coil Only) in Excellent Condition
