Exponentially switchable coil
Transmitting Variable Inductors
Roller Inductor | Continuously variable roller inductor. It'… | Flickr
Unknown Roller Inductor Very Nicely Made for Homebrew DIY Transmitter/Tuner | eBay
E.F Johnson Roller Inductor 229-201 0 - 10 uH / 3 AMP | eBay
Rolling Inductor 150Watts 150uH high speed adjustable inductor
Roller Inductor 0.1-5uH 40kv 0.5-30Mhz Silver Plated Graphite Body
G3YNH info: Variable inductors used in HF antenna matching networks.
Commercial 20 uH High Quality, Plated Roller Inductor from Broadcast Transmitter in Excellent Condition
EF Johnson 25 uH High Quality, Silver Plated Roller Inductor from Broadcast Transmitter in Excellent Condition
Roller Inductor MFJ 989D Antenna Tuner 33 uH
Unusual Variable Inductor - Forum - Passive Components - element14 Community
16 uH High Quality, Commercial Silver Plated Roller Inductor (Coil Only) in Excellent Condition
roller-inductor
Transmitting Variable Inductors
29 uH High Quality Roller Inductor on Ceramic Coil Form in Excellent Condition
G3YNH info: Variable inductors used in HF antenna matching networks.
Roller inductor 24uH
Roller Inductor MFJ 962D MFJ 969 Antenna Tuner 33 uH
Roller inductor making - YouTube
