<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12pt"><div>Hi All,</div><div>I have been playing with Class E amplifiers and PDM modulation for many years. This sounds like the perfect time to think about building a PWM modulator for the 5KW PEP 75M class E amplifier I put in QEX Nov. 2005. The chassis is all machined for a modulator but I never had a chance to build it. I got involved in HPSDR and never finished it. Frank WA1GFZ</div></div></body></html>