I guess Ashraf wants the BC signal just to optimize for f/b, so no local
signal or interference.
SWR is irrelevant with a beverage, everything below 3 will be OK and it does
its job with higher SWR as well.
73
Peter, DJ7WW
-----Original Message-----
From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of
pa5mw@home.nl
Sent: Mittwoch, 4. Juli 2018 21:56
To: 'Ashraf Chaabane'
Cc: topband@contesting.com
Subject: Re: Topband: Beverage Antenna Tuning
Another question might be; how close by is this BC station or any other AM
BCB stations?
Please consider a HP BC stopfilter
73 Mark, PA5MW
-----Original Message-----
From: Topband <topband-bounces@contesting.com> On Behalf Of Ashraf Chaabane
Sent: Wednesday, July 04, 2018 4:40 PM
To: pa5mw@home.nl
Cc: topband@contesting.com
Subject: Re: Topband: Beverage Antenna Tuning
Mark,
I'm planning to have the termination value adjustment excercice for F/B
maximisation using a BC station signal. However, does SWR measurement have
to do also with the termination value? Or that's rather the matching
transformer that I should act on?
I now have an antenna analyzer and multimeter. What kind of optimization I
can carry out? (The beverage is permanently installed).
73 Ash
On Wed, Jul 4, 2018 at 3:23 PM <pa5mw@home.nl> wrote:
> Based on my field installed beverages experience, I would say this is
> exactly what I always read on my ant analyzer.
> Ground and local air/bush moisture level changes, like after rain or
> such, will affect readings too.
>
> I would do optimization only if this installation was permanent and
> you have the time and tools available.
>
> 73 Mark, PA5MW
>
>
>
> -----Original Message-----
> From: Topband <topband-bounces@contesting.com> On Behalf Of Ashraf
> Chaabane
> Sent: Wednesday, July 04, 2018 4:13 PM
> To: topband@contesting.com
> Subject: Topband: Beverage Antenna Tuning
>
> Hi All
>
> I measured the SWR in my beverage antenna; the SWR fluctuates between
> 1.5 and 3 in a range of 1.8 to 7 MHz. (See:
>
> https://drive.google.com/drive/folders/0B9AtNpPfAOUMRDNsaXROMG1VUTg?us
> p=shar
> ing
> )
> I know SWR should not vary too much. However, some people are
> suggesting adjusting the termination resistor. Others suggest checking
> the transformer number of windings for a good match. What shall I do?
>
> 73 Ash 3V8SS/KF5EYY
> _________________
> Topband Reflector Archives - http://www.contesting.com/_topband
>
>
--
Ash ~ 3V8SS/KF5EYY
http://www.kf5eyy.info/
Phone/SMS/Whatsapp: (+216) 22670026
Skype: kf5eyy
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