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
E.F. Johnson 222-103 Roller Inductor 10uh - Electronic Components - BMI Surplus
Transmitting Variable Inductors
Roller Inductor | Continuously variable roller inductor. It'… | Flickr
EF Johnson 25 uH High Quality, Silver Plated Roller Inductor from Broadcast Transmitter in Excellent Condition
Roller inductor 24uH
Unknown Roller Inductor Very Nicely Made for Homebrew DIY Transmitter/Tuner | eBay
229-201 Johnson Roller Inductor with Gear 10uh (Pull)
G3YNH info: Variable inductors used in HF antenna matching networks.
Transmitting Variable Inductors
Cone-shaped roller inductor
roller-inductor
Transmitting Variable Inductors
EF Johnson Roller Inductor 229-201 / 0 - 10 UH / 3A | eBay
AN/FRT-17 Roller Inductor Assembly
16 uH High Quality, Commercial Silver Plated Roller Inductor (Coil Only) in Excellent Condition
Roller Inductor MFJ 962D MFJ 969 Antenna Tuner 33 uH
N4ZOU's Variable Inductor Design
Commercial 20 uH High Quality, Plated Roller Inductor from Broadcast Transmitter in Excellent Condition
