File:Circuit diagrams for Annecke balanced line antenna tuner 2.png - Wikimedia Commons
JC-4 automatic atu
Second Hand MFJ-974B 6 - 80 Meter Balanced Line Antenna Tuner - RW UK
MFJ-974HB Manual antenna tuner sym. 1,8-54MHz, max. 300W | WiMo
Antenna Tuning Device | LZ2GL
Ham Radio Site - {Symmetrical Matchboxes}
Symetrical antenna tuner
Super Massive Tuna
Flexibility in the antenna coupler
Ham Radio Site - {Symmetrical Matchboxes}
Antenna tuner - Wikipedia
Symmetrical ATU _019
Super Massive Tuna
Symetrical antenna tuner
JC-4 automatic atu
Ham Radio Site - {Symmetrical Matchboxes}
Balanced Antenna Tuner
ATU4K--Balanced Antenna Tuner (ATU) Kit, Indoor - True Ladder Line and Wire Antennas
Antenna tuners/couplers
Antenna Tuner BALUN - ON7FU Ferrite Applications
Ham Radio Site - <High Power ATU's>
Annecke Symmetrical Antenne Tuner Demonstration - YouTube
MFJ-974B Balanced Line HF ATU 80m - 10m 200W | eBay
Ham Radio Site - {Symmetrical Matchboxes}
MFJ-962D Manual antenna tuner asym./sym. 1,8-30MHz, 1500W | WiMo
PC2C Symmetrical Antenna Current Meter
