I would have kept mine if I had seen that kind of performance. Either I have a very low noise floor, I had degraded performance of the RX antenna for some reason or I was doing something wrong. When I saw a difference in SNR it was very minor and wouldn’t have been the deciding factor in making the contact. It had a bit less loss than my K9AY but there was more wire in the air. Difficult to erect...wife helped but fell once before we got it right.
I don’t expect my experience was typical so not wanting to dissuade others...the SAL antennas are good antennas....but I didn’t see the performance displayed on the Array Solutions web site video at this location. Cecil K5DL Sent using recycled electrons. > On Dec 28, 2018, at 10:21 AM, <[email protected]> <[email protected]> wrote: > > Wes you're right > > The SAL is a good antenna, any directivity increases signal to noise ratio. > The RDF is 2 to 3 bd better than the vertical antenna, it means the > improvement on signal to noise ratio is about 6db. You can dig signals 6 db > below noise with the SAL that you cannot hear with the inverted L. > > ..but the SAL has the same performance of a K9AY, or EWE or a single FLAG, > The clamed 10 db RDF was never confirmed or measured, The SAL is the most > complicated K9AY you can build. The separation in two loops does not change > the directivity. > > You can phase 2 FLAGS to increase RDF to 11.5 DB, as well you can phase two > K9AY or 4 if you want, but the SAL phasing system is complicated and it is > impractical to phase two SAL to increase RDF. > > 73 > JC > N4IS > -----Original Message----- > From: Topband <[email protected]> On Behalf Of Wes Stewart > Sent: Friday, December 28, 2018 10:50 AM > To: Arthur Delibert <[email protected]>; Jeff Woods <[email protected]> > Cc: topband <[email protected]> > Subject: Re: Topband: Inverted L improvement question > > I was an early participant in the SAL yahoo group and introduced Dan, AC6LA, > to the group. He has provided a lot of modeling tools. > > That said, I lost interest after feeling that the design was too complicated, > not well understood and suffered from a dizzying number of changes. I could > be totally wrong about this, but that was my assessment some time ago and > frankly I haven't kept up. > > Wes N7WS > > > >> On 12/27/2018 4:15 PM, Arthur Delibert wrote: >> You may also want to check out the SAL-12, -20 or -30 antennas from >> Array Solutions. My yard is pretty small, but I was able to put up a >> SAL-12, and I love it. (I do mostly 49-, 60- and 90-meter SWBC DX.) >> I can switch the antenna to any one of 8 different directions, and I'm >> often surprised to find that the DX is coming from a direction different >> from what I would expect. >> Often there's a very pronounced peak in the signal when the antenna is >> pointed in the right direction, and I really would not have had any >> copy if I couldn't point in that direction. >> >> The SAL-12 isn't especially good on 160, but is good from 3 MHz and >> higher. The SAL-20 and -30 are reportedly very good on 160. If I >> recall right, the >> SAL-20 is directional up to 20 meters; the SAL-30 is good up to 40 >> meters. Check the Array Solutions website to confirm. >> >> These aren't as cheap as putting up your own pennant, but above 3 MHz, >> the >> SAL-12 aimed NE almost always outperforms my pennant pointed in the >> same direction. >> >> Regards, >> Art Delibert, KB3FJO >> >> ---------------------------------------------------------------------- >> ---------- > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector > > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
