Hi,

Those of you interested in digital transmitters might take a look at the
new(ish) TPA3000D1 from TI.

www.ti.com/sc/tpa3000d1

It's a class D audio amp capable of 17 Watts audio. It has a switching speed
around 200 Khz.

I figure it's a "good news" and "bad news" story.

The good news is that it could possibly be used as a basis for a simple qrp
VLF TX
(I figure that the RC osc could be over-driven by an Xtal osc...)

The bad news is that they are seriously proposing that these things be used
in consumer equipment without any form of output filter....

......................... Zim