The ARRL recently published a book “Receiving Antennas for the Radio Amateur”. It maintains that “The function of transmitting antennas is to radiate power efficiently, while the function of receiving antennas is to present the best signal-to-noise ratio to the receiver”. It maintains that “using the same antenna for transmitting and receiving roughly coincided with the advent of the transceiver in the 1950s and 1960s.” And “The glaring differences in priorities between transmitting and receiving antennas becomes...well...glaring...when we start looking into the concept of efficiency.” And “some of the most effective receiving antennas are abysmally poor performers when efficiency alone is considered”. It’s an interesting book.
Chuck KE9UW Sent from my iPhone, cjack > On Sep 9, 2018, at 2:16 AM, David Gilbert <[email protected]> wrote: > > > > I truly do not understand why this idea that "I can work anything I can hear" > hangs around as a gauge of anything meaningful. It's a totally meaningless > reference. Antennas are generally (as in almost always) reciprocal between > transmit and receive, so if you suck on transmit you're likely to equally > suck on receive. So yeah ... most of us probably can work anything we can > hear but that doesn't mean anything other than we haven't managed to screw up > the physics of the world. > > 73, > Dave AB7E > > > >> On 9/8/2018 5:00 PM, Fred Jensen wrote: >> During the runup to Cycle 19 [!1957 for me], it was said you could work >> anything you could hear on 10 with 20 watts to the window screen. Window >> screens were copper in those days. I tried it out with my "28-28" >> [6J6-2E26] rockbound 10 m TX, and indeed, I seemed to be able to work >> everything I heard if I had a 40 m rock close enough. Window screens are no >> longer copper so I don't think it would work today. My "tuner" was the >> adjustable link coupling to the tank. College starting 1957, military and >> SE Asia in 62, and Cycle 19 was in the rear view mirror when I got home at >> the end of 1967. Oh that Cycle 25 would repeat even half of 19! >> >> 73, >> >> Fred ["Skip"] K6DGW >> Sparks NV DM09dn >> Washoe County > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
