Check this out - 400 watt carrier, no tubes, MOSFET. Just wow. Has schematics and everything.
The Official Class E Transmitter Web Site by WA1QIX
The Official Class E Transmitter Web Site by WA1QIX
Someone needs to build this and do a documentary for us on the forum!
Someone needs to build this and do a documentary for us on the forum!
I've spoken to Steve (WA1QIX) on 75 meters about these transmitters many times. He says the design works good on AM or CW only, up to 40 meters. Beyond about 10 MHz the Mosfet devices used have too much internal gate capacitance to drive. They do manufacture Mosfets that reduce this problem but they are very expensive and would require different RF design.
. Beyond about 10 MHz the Mosfet devices used have too much internal gate capacitance to drive. They do manufacture Mosfets that reduce this problem but they are very expensive and would require different RF design.