It really depends on how badly you want the contact it your getting very close to Honor Roll and so is your age, use all that you have. I work QRP and QRO both enjoy both equally.
73, Fred/N0AZZ K3 Ser #'s 6730/5299--KX3 # 2573--K2/100--KAT100 P3/SVGA--KPA500--KAT500--W2 -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of EricJ Sent: Saturday, March 23, 2013 1:56 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] OT: For New Hams, How to Tell What an Amp Will Do For Your Signal In fact, the whole concept is codified in FCC Part 97 ยง 97.313 Transmitter power standards. (a) An amateur station must use the minimum transmitter power necessary to carry out the desired communications. Sometimes that's 500mw, sometimes it's a lot more. Ultimately, the objective of this hobby is communication. If you can communicate at only 500 mw, do so; in fact, the law requires it. If you need 500 watts, you should do so. Not to means you fail at the most basic objective of the hobby. 90% of the time I'm CW QRP. The rest of the time I have my K2/10 (SN 567) cranked to the 15 watt max. Eric KE6US K1/KX1/K2 On 3/23/2013 8:42 AM, N2TK, Tony wrote: > Dave, > Nice work! > We did this empirically about 30 years ago. Convinced a bunch of us > that 1db is worth fighting for. As you show it is how you compare > against someone else who is also calling at the same time. 2-3 db > increase is almost like a capture effect to our ears as on FM. In > addition if you are at the noise level of the receiving station it may > not take much power increase to make the difference whether or not you are heard. > You don't always need 100W or 1500W, but it is nice to have it there > if you need it. > > Which reminds me, I haven't asked Elecraft for quite some time, where > is my 160-6M KPA1500? :-) > > 73, > N2TK, Tony > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Gilbert > Sent: Friday, March 22, 2013 7:03 PM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] OT: For New Hams, How to Tell What an Amp Will > Do For Your Signal > > > That's a good resource but it doesn't tell the whole story. An > amplifier will give you around 10 db improvement in signal on the > other end. That's more than the difference between a dipole and a > five element monobander. As little as 3 or 4 db will make a > significant difference when competing against others in a pileup, and > of course as little as 2 db can make the difference between no copy > and clear copy if your signal is right at the noise level. > > http://www.ab7e.com/weak_signal/mdd.html > > Hams have turned their noses up at amplifiers for decades, but the > reality is that an amplifier and a decent vertical is often a more > cost effective way to put out a good signal than is low power to a > tower and big antenna ... especially if you live in a low noise area > where you don't need lots of discrimination to hear DX (and even then > there are compact receive loops that make possible alternatives). > > Dave AB7E > > > > On 3/22/2013 12:49 PM, Ron D'Eau Claire wrote: >> For the newer hams, here's an interesting resource that will >> demonstrate to you what a DX signal sounds like at 100 watts, 10 >> watts, 1 watt and 0.1 watt. All you have to do it tune into the >> beacon frequency of 14.100, 18.110, 21.150, 24.930, 28.200 using CW >> mode and listen. The beacon stations in 18 countries take turns >> sending call signs and 4 dashes, each dash in descending power level. >> You might be amazed at how often you can hear 10 watts or less >> clearly from half way > around the world when the band is open. >> When the band is not open, a kilowatt doesn't get through. >> >> A complete list of the stations, locations and the transmission >> sequence is >> at: >> >> http://www.ncdxf.org/beacon/beaconSchedule.html >> >> IIRC, all of the stations use a simple 1/4 wave vertical antenna. >> >> I'm not saying that an amplifier isn't useful, but this helps put the >> advantage of having one in perspective. >> >> 73, Ron AC7AC >> >> >> >> ______________________________________________________________ >> 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 >> > ______________________________________________________________ > 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 > > ______________________________________________________________ > 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 > > ______________________________________________________________ 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 ----- No virus found in this message. 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