The Finnish designed JUMA PA-1000 uses a single Freescale LDMOS MRFE6VP61K25H.http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=MRFE6VP61K25H
Freescale is the "spin-off" of the Motorola Division that Finnish-American Helge Granberg (SK, 1996) worked in with Norman Dye and Les Besser during the development of the first solid-state Bi-Polar and MOSFET RF transistors.https://community.freescale.com/thread/313550Helge is the Finnish equivalent to Art Collins.
For that reason, JUMA has specific pride in this HF amplifier product / construction project.
The Freescale Labs in Arizona (Donna Vigneri, KF7SJF) has been testing
many potential HF designs for the past few years.
A couple of years ago, F5FLN described a 6 meter KW amplifier that he built modeled after the Freescale MRFE6VP61K25H reference design for an commercial FM broadcast (88-108 MHz) amplifier. The article was published in Dubus magazine (German radio).
Jim, W6PQL has used this Freescale LDMOS for a number of
1 Kilowatt mono-band VHF (6m, 2m, 222 MHz) amplifiers.
Details and assemblies that Jim sells can be found on his web site.http://www.w6pql.com