On 6/3/2019 11:54 AM, Dennis Monticelli wrote:
RFI wise we're looking at a PWM inverter with very sharp switching edges
(to keep efficiency high).
Yes, efficiency is clearly critical. This is where optimization of the
switching waveform can be part of the solution. Elecraft's
implementation for CW keying is a raised cosine.
It's too bad the output side of each optimizer does not consist of
twisted pairs each returning to a central point within the main inverter
box where serialization would take place.
In the installation on which I consulted, this wiring WAS implemented as
twisted pair, based, I suspect, on the QST piece by K1KP and W1RFI.
73, Jim K9YC
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