Back in Summer 2015, I wanted something better for my aging +27 year old AM Carrier-Current gear, a Panaxis AM-100 exciter and a 2W home brew linear amp with a 7 element Chebychev. Looking at what that dude on PLL.gr had certainly fit the bill,
http://www.pll.gr/product?pid=AM-20W (I was one of the last ones to get the unit with analog VU and SWR / RF OUT meters.) So, for $455.00USD's, I'd gotten an AM exciter with FREQ agile DDS oscillator, +24VDC - 6A power supply, 80W PEP amp, and an auto switching LPF board, with VSWR warning and RF fold-back protection. Beats paying Radio Systems for their $3,500.00 FCC certified TR-6000 10W AM exciter. However, I don't believe the amp is PWM, but a push-pull Class AB amp. Still, should last me for another +27 years, especially since I'm not running full bore 20W, but less than a 5W carrier to the CP-15 Radio Systems Carrier-Current coupler. Those Greeks seem to be kicking some RF butt on AM, and I'm glad to see that someone is.