This is the first one of these transmitters that I have installed. This particular unit is analog only, but there is lots of room left over for an HD exciter, if need be.
The size of a 10 KW FM transmitter these days is pretty small, basically taking up the equivalent of one rack. This is a relatively small transmitter room, the old tube transmitter basically took up the entire room. With this unit, there is room to install a full power spare, if that was desired.
RF modules use LDMOSFET devices, each module has a power output of approximately 1,600 watts.
There are eight power amp modules and seven switching power supplies.
One issue at this site, there is no reliable three phase power available. There was a three phase open delta, but man, that thing scares me a little bit. Since this is a single phase setup, I was curious to know what the current draw on each leg was at full power. I measured with my clamp on ammeter; 54.3 Amps at 120 volts, or 6516 watts per leg. Overall power draw 13,032 making the AC to RF efficiency 65.2%. VSWR calculates out to 1.21, which is not great. I think the antenna could use a little bit of tuning love.