[Amps] LDMOS PAs and high power low pass filters/diplexers

[Conrad Farlow]

I have been very fortunate and acquired a few nice 1kW class pallets for 
6m, 2m and 70cms. They are fairly well known designs but as I have had 
absolutely no experience of these kinds of amplifiers I would like to do 
some reading. So are there any recommended papers application notes or 
books that I ought to be reading before I attempt to make these pallets 
into real world amplifiers?

I have had a look at the Freescale and NXP websites and I have not seen 
anything that suggests suitable heatsinks beyond what is required for 
the heat spreader, this makes me very nervous. I'll probably end up 
using something far too big!

I understand that over driving these devices for even a short space of 
time will cause instant device death, this is also very scary for a 
person brought up on triodes!

Finally low pass filters and or diplexers that can handle sufficient 
goo. I have never designed a high power diplexer before and would like 
to try, particularly for 6m so can anyone recommend any reading?

I have decided that I am done with tube PAs, I simply don't trust myself 
around lethal voltages any more.

73

Conrad G0RUZ