[Amps] Tubes vs. Solid State (was) Expert Amps 2K-FA: Any Opinions ?

[K8MLM at aol.com]

Joe,
 
This is getting interesting.  Please explain below statement.  I  know the 
FCC is kind-of backward, but why is it impractical?
 
In a message dated 4/29/2012 8:43:25 P.M. Eastern Daylight Time,  
lists at subich.com writes:

A well  designed amplifier using 8 VRF-2933 or a pair of the Motorola/
Phillips  1200W TV transmitter "bricks" could be done commercially at
a price that is  competitive with the top of the line Alpha but FCC
rules make it very  impractical for any US manufacturer to bother to
do  so.

Thanks,
 
Bob
K8MLM