Re: Drake L7 Power output
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Some things to know/ realize: With new tubes and the plate voltage on the high setting and with a reasonable dummy or antenna load, you will easily get 1200 Watts. It is typical that the higher frequencies are lower output power.? This is also a useful, broad based measure of your tubes.? Aged tubes have less power on the higher frequencies.? Tubes that are new and presently available?are, in my opinion, generally of poorer quality that the originally used and intended tubes. Your watt meter?needs to be?calibrated to a known stable standard if your mode of effectiveness is output?power measurement. There is very little difference between 1000 watts and 800 watts or less on the other end.? Having a signal at the other end of 10 over S9 is just as effective for a normal qso as S9.? Striving for full max on every tune up will have you also buying new tubes more often.? I run mine no more than 800 watts because I do not need to go higher?to make and hold a qso.?? Use the lower?plate voltage/power setting of the?initial?tune up.? If that power is ok for your purposes, no need to go higher.? But if you then need more, go to the higher plate voltage setting and do a slight adjustment on the tuning. The L7 is a good amplifier.? Care for it and your tubes and you should have good service. Good luck. David Assaf III W5XU, VP8RXU ? On Mon, Mar 4, 2024 at 9:16?AM Johann OE5JWL <johann.woeckinger@...> wrote: Hi, |
David