> Most 3-500 based amplifiers with 2800 V (no load) on the plates > require 120 Watts or so for "legal limit" output. That's about > 11 dB gain.
Even with 3 x 3-500s in my LK550 and 2,900V no load, I only need about 25-40W input depending on band to reach our legal limit: 500W. Which is plenty, way too much in fact for the digital modes. > Part 97.317(a)(2) limits the maximum gain to 15 dB > (approximately 50 W drive for 1500 W out). Not in NZ. Is there really a max gain regulation in the US? How quaint! > The extra 10 to 20 watts of drive makes a difference for those > who have SB-220, TL-922, AL-82, AL-1300, AL-572, etc. amplifiers. > It can mean another 200+ W output. ... The difference will be small in pure signal strength terms but sure the operator's confidence is improved. A cheaper option (as used by certain CBers) is to tweak your power meter to read high. Seriously, though, a bit more attention to operating skills and maybe a little investment in your antennas and feeders will eclipse the QRO option every time. #1 DXing tip is simply to be very active and listen hard. #2 is to save up those tenths of dBs you get for free by eliminating unnecessary coax connectors, and indeed unnecessary coax. Someone should start giving out 0.1dB savings stamps and a DXers' collector's card. 73 Gary ZL2iFB ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
