I have used OWA Yagi's for over 20 years, so lots of real experience - I
would never install anything else here.
The wide VSWR bandwidth is really a great feature.
I have four legacy beta matched 10 meter and 6 meter Yagi's that will be
replaced this summer with OWA ones - then we will be 100% OWA here (save for
two Moxons on 40 meters). OWA Yagi's are simple, efficient and easy to
build. Modeled designs hold in the real world, another great feature
It's not too good to be true - it's just good science :-)
73
Tim K3LR
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
Robert Harmon
Sent: Wednesday, April 29, 2020 11:37 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] 40m 4el KLM - replacing linear loading with coils
How much loss is there in a conventional Yagi match ? From what I
understand the OWA has about a .50 dB loss in forward gain compared
to a conventional Yagi. If a conventional yagi has about the same .50 dB
loss in the match system then they would both have about the
same forward gain. Then............. the OWA is winner with its wideband
SWR curve.
Sounds like a " If it seems too good to be true" thing :-)
Bob
K6UJ
> On Apr 29, 2020, at 10:43 AM, john@kk9a.com wrote:
>
>
> That seems a little high for OWA gain reduction, especially with modern
designs. I believe the theory is that a conventional a Yagi has losses from
the match and a OWA of course has no match losses. Most of the high scoring
contest stations are using OWA Yagis.
>
> John KK9A
>
>
> Brian K6STI wrote:
>
> If you think the 0.5 to 1 dB a conventional OWA costs in forward gain is
> inconsequential, check this out:
>
> http://ham-radio.com/k6sti/pileup.htm
>
> The analysis isn't definitive. But the next time it takes forever to
> bust a pileup with your OWA, you may not be able to get the probability
> curves out of your head.
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|