Keep in mind that it all adds up. If you get 2 db more from your beam, and 3 db from going from 500 to 1000 watts (say), and maybe a db by replacing your old coax, etc., that's 6 db -- a huge advantage.
On 1/17/2012 4:15 PM, Alan Bloom wrote: > Interesting experiment Dave. I think that kind of test is valid for VHF > operation. But on HF it is very rare to hear a signal at a constant > level like that. > > Normally signal strength varies considerably from moment to moment due > to fading. Even if the average signal level is right at the noise > level, most of the time it will be well above or well below that level. > A dB or two increase or decrease will vary the percentage of time the > signal is copyable, but only a little. The QRM also varies in signal > strength from moment to moment. > > Of course, louder is always better. But unless you are a big-gun > contester, where winning or losing depends on a few extra contacts over > the course of the weekend, I think you'd have a hard time noticing a > couple dB difference in normal operation. > > I am just about to order a 2-element SteppIR Yagi. I decided that the > extra dB or two of the 3-element model is not worth another $450. :=) > > Alan N1AL > > > On Tue, 2012-01-17 at 16:52 -0700, David Gilbert wrote: >> A power ratio of 3 (1500 watts versus 500 watts) is just under 5 db. >> Check out these audio files (CW, though ... not SSB) I generated to see >> what kind of impact that can have for readability of signals near the >> noise threshold. >> >> http://www.ab7e.com/weak_signal/mdd.html >> >> 73, >> Dave AB7E >> > > ______________________________________________________________ > 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 -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ ______________________________________________________________ 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
