The unit on the left has a nice mod where the fellow added a directional coupler, meter, switches and an SO-239 connector to turn it more like a “normal” antenna tuner, but IMHO – its front face has the weirdest interface for an antenna tuner
Having the antenna connectors on the front is bizarre, EXCEPT for my use – which is to set this in a waterproof case – and use it remotely at the antenna. I could even use the URAT idea and attach three Stepper motors on the three controls – if I use it as a Pi tuner, or two controls if used as an L tuner.
Rudy, N6LF’s feedpoint diagram from https://rudys.typepad.com/ant/files/antenna_array_80160m.pdf
Rudy, N6LF has posted some great Bruce Array articles in QEX and other ARRL publications, and this one has a Voltage Feed (#3) – which is where I could use the antenna on more than one band. A voltage feed is also very convenient – location wise and also for the Collins 180S-1 antenna coupler – and where I’d use it in the L mode.