Suggestions for new transmiiter build

[KK7UV]

As I get my A.M. station back together after a year off the air, I would like to try my hand at a Class E build.  I am looking at 10m only, 29.0-29.2 coverage, PWM, and only 100w or so.  I have gone thru the WA1QIX page and am getting a handle on the design aspects, but am needing some help on a couple things to start:

How to select an output device?  Looks like push-pull MOSFETs are the thing, but I'm lost in knowing how to decide.

How do I design the driver and modulator?  All I see are high-power designs and I'm not sure how to scale them down for a 100w P.A.

Thanks for any advice,

Steve KK7UV

 

[KD6VXI]

ARF448 in class E.  MRF300 in Class E.

My 10 meter deck uses a 448 in class e.  100 watts carrier 120 percent peaks.

Designed my own modulator and filter from parts of Steve's designs and others.  Ended up with a tx capable of 420 percent positive peaks!

Anywhere, those are the devices I wpuld use.  Bonus, the 448 only takes one device.  Bad part, not made anymore.  A pair of mrf300 or mht1803s will have you right where you want to be, though.  And they are fairly cheap.

And can do 6 meters in the case of the mrf300.


--Shane
WP2ASS / ex KD6VXI

[KK7UV]

Thanks for reply Shane.   I will look into those options.