There is not upper limit to how high in frequency
a Class E amplifier can operate.
The "final amplifier" operates as a switch and so
the use of a tetrode instead of a triode would be
best. At 75 meters and below mosfets are the
most likely candidate.
If a semiconductor is used as the switch then there
is a limit to the upper frequency (for reasonable
efficiency) but that is due to the semiconductor
(mosfet, typically) and not to the use of the
Class E topology.
A free program to design the old original single-
ended Class E amplifiers is here:
http://tonnesoftware.com/classe.html
- Jim WB6BLD
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|