G3YNH info: Variable inductors used in HF antenna matching networks.
RI-32 32µH Roller Inductor 3.5" x 3.75" x 6 3/8": Palstar.com
Transmitting Variable Inductors
16.2 uH High Quality, Silver Plated Roller Inductor from BC-939B Antenna Tuner in Excellent Condition
16 uH High Quality, Commercial Silver Plated Roller Inductor (Coil Only) in Excellent Condition
Variable Roller Inductor Coil - JOHNSON 10uH - LINEAR AMPLIFIERS ANTENNA TUNERS | eBay
MFJ MFJ-404-1056 MFJ Replacement Air Roller Inductors | DX Engineering
Variable Roller Inductor Coil-Giant-48uH-HF Linear Power Amplifier-Antenna Tuner | eBay
755017A8230 Roller inductor, fscm 14304, NSN # 5950010573825
Gates 29 uH High Quality, Silver Plated Roller Inductor from Broadcast Transmitter in Excellent Condition P/
roller-inductor
A MIL-SPEC roller inductor for QRO operation - LB3HC's engineering blog
hamtech
Commercial 20 uH High Quality, Plated Roller Inductor from Broadcast Transmitter in Excellent Condition
229-201 Johnson Roller Inductor with Gear 10uh (Pull)
AN/FRT-17 Roller Inductor Assembly
Rollerinductor
Computer controlled roller inductor – Chiburban Radio Mobileers
EF Johnson Roller Inductor 229-201 / 0 - 10 UH / 3A | eBay
VARIABLE ROLLER INDUCTOR COIL - HF POWER AMPLIFIER - ANTENNA TUNER QRO | eBay
EF Johnson 11.3 uH High Quality, Commercial Silver Plated Roller Inductor in Excellent Condition
E. F. Johnson Large Roller Inductor Coil for high power amplifier or tunner. | eBay
Cone-shaped roller inductor
