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Andy and Co
To take advantage of ur 50V 25A psu for a class E
amp the component values for 1.25Kw would be C1 = 0.067164uF, C2 = 0.086306uF in
series with L1 = 1.57936uH.
RL = 0.99234ohms, then a suitable step up
transformer for say 50 ohms to match a suitable antenna via a LPF (several poles
at this power to supress the harmonic content).
A couple of suitable FETS in parallel wouldn
do the trick. I built a class E using 60V ht some years
ago for LF and it is still going well.
Push pull as you know helps reduce the 2nd
harmonic but maybe not as much as you think, therefore a single ended
approach is more robust with a good LPF.
I am sure you have all this information anyway
for class E design.The most critical part is setting the amp up using a
'scope to avoid V spikes,
I have no protective ccts in place but my
antenna is very stable and unaffected by the WX.
73 de mal/g3kev
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