[Amps] Future of RF AMPS

[Geert Jan de Groot]

> The underlying basis for these and most multi-FET modules is the venerable
> Helge Granberg / Motorola conceived EB-104 HF MOSFET amps originally based
> on the now old MRF150 devices; 

I would also look at other devices. For instance, NXP produces a number 
of devices (like the BLF578XRS) where a single device produces up to 
1400 watts, up to 500 MHz.

The selling factor is that they are extremely rugged and are spec'ed to
survive open antenna or a short without any damage.

You should be able to spot-weld the casing of the PA using the output
of the PA itself without any adverse effect on the devices itself.
Some of the youtube movies are amazing and worth looking at.

I don't know what the IMD characteristics are. Anybody tested these?

73, Geert Jan PE1HZG