MF GRP
At italab.it there are some nice amplifiers suitable for MF.
The HF amplifiers spec lower limit says 1500 Khz but I have been in
touch with the Chief Engineer who says 472 Khz is not a problem if
requested.
There is a nice selection and the price reasonable if you supply your own
PSU and box etc
FETS used are MRFE6VP61K25H.
These FETS are available from other sources at around £100 each and will
withstand a SWR of 65 : 1 very rugged. A good way to build your own
AMPLIFIER
One device is capable of over 1Kw, check this info out on the web for more
info about voltages, current etc
73 de mal/g3kev