There were many replies to my plea for help. I won't reply to all
individually but every reply is much appreciated! Thank you all!
To respond to a few things:
I do not need a linear amp. I spent much time looking for a medium
power (50W or so) class E amp but could not find any designs. There
are many 250W and up class D circuits around but they all get out of
my budget for this year. I found this and since it was affordable I
decided to give it a try. I knew it was risky but better to try
something than do nothing at all.
Capacitors in the LPFs are all WIMA FKP. I did not feel any heating.
Capacitors in the amp are also FKP.
I'm afraid I have very little experience or confidence in working
with SSPAs of any type. I have designed and built many a tube PA up
to 1500W at HF through UHF but working with FETs is all new to me.
I have to spend today working on a tower but will return to this
project and try some of the suggestions I received as soon as possible.