MFJ-1644 Manual : Free Download, Borrow, and Streaming : Internet Archive
HF ANTENNA TUNER by Harry Lythall
Improving the Hy-Gain V-6R 6-Meter Collinear Gain Vertical Antenna
Silver Bullet 1000 TIA - Martin's Site
Spark-gap transmitter - Wikipedia
How to Lower SWR and Tune Ham and CB Antennas - TurboFuture
Modeling Loads: What Kind, How Much, and Where?
Antenna tuner - Wikipedia
Antique Radio Forums • View topic - Detrola radio/phono, chassis 448
Build a Vintage Radio Sweep Alignment Instrument — Part 2
Introducing the All-Band Doublet
Antenna Coil Adjustment Procedure