The Shively Branched combiner

Did some work a while ago at a transmitter site that had three transmitter combined into one antenna.  The site uses a Shively branched combiner:

Shively Branched combiner
Shively Branched combiner

Each transmitter can be tested into a separate 20 KW dummy load:

Three inch coax switches
Three inch coax switches

Transmitter themselves are Nautel NV15s:

Nautel NV20 transmiters
Nautel NV15 transmiters

Except the one on the end, which is an older BE FM20A.