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, <n4is@n4is.com> <n4is@n4is.com> 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 <topband-bounces@contesting.com> On Behalf Of Wes Stewart
> Sent: Friday, December 28, 2018 10:50 AM
> To: Arthur Delibert <radio75a3@msn.com>; Jeff Woods <jmwooods@yahoo.com>
> Cc: topband <topband@contesting.com>
> 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
>>
>> ----------------------------------------------------------------------
>> ----------
>
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