On a sunny day (20 Sep 2006 04:28:52 -0700) it happened "Telstar Electronics"
wrote in
.com:

Steveo wrote:
Are FET's the most economical transistors, or are are there other choices
for a 10 meter portable amp? The high drive would make it a bit more legal
too, wouldn't it? (dunno, just curious)

FETs like the MRF173 (or similar) have certain advantages. They also
have several disadvantages... one is cost! Franks proposed design
already looks to have a hefty price tag as described.

www.telstar-electronics.com

http://www.sphere.bc.ca/test/rf-semis.html