> If you need more than a few kilowatts of power, especially at UHF or > above, you're probably going to be using tubes. Those might be plain > old 4CX15,000s, or -- for a megawatt or so at microwave frequencies -- > 6 foot tall klystrons. Like I said before - not anymore. Let it go, man, let it go... William Donzelli aw288 at osgn.org