Well, I've been using the new class E-Z transmitter for about a month now... and have run an extensive
battery of tests designed to prove the robustness of the design under adverse conditions.
To quickly recap the design: The transmitter is a 10 MOSFET transmitter designed to run about 300 - 400 watts of power.
The RF amp uses a single driver IC for each module, and the rig is bandswitched between 80 and 160 meters. The
modulator is a small Pulse Width design.
The tests:
1) At full power, and under modulation, repeatedly short-circuit the RF output, both at the
transmitter and along the feedline. Rig shut down each time; no failures.
2) At full power and under modulation repeatedly disconnect the antenna at several
points. Rig shut down each time; no failures.
3) Attempt to operate the transmitter at too high current. Rig shut down each time; no failures.
4) At full power and under modulation remove the RF drive. Rig shut down each time; no failures
These tests were repeated on purpose, and by accident numerous times.
I am in the process of creating complete schematics of the entire transmitter, modulator
and power supply. Also laying out a PC board for the modulator and associated
control and protection circuitry. The design is complete from microphone to
modulated output. The layout will accept up to 6 MOSFETs in the modulator
output section (up to 1200 watts of modulated DC) and includes all drivers, pwm generator,
8 pole Butterworth input filter, negative peak limiter, tone compensation (mic preamp), etc.
The builder can opt to not populate whatever sections of the
PC board are not needed (such as the mic preamp, if this is not desired, or the
output section, etc. etc.).
The board layout is flexible enough to allow it to be used in a wide variety
of applications and transmitter designs.
I am absoultely looking for feedback, if anyone has any.

Regards,
Steve