my one plug in my officd/livingroom is dead > On Jul 4, 2018, at 12:00 PM, [email protected] wrote: > > Send Topband mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.contesting.com/mailman/listinfo/topband > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Topband digest..." > > > Today's Topics: > > 1. Beverage Antenna Tuning (Ashraf Chaabane) > 2. Re: Beverage Antenna Tuning (Joe Subich, W4TV) > 3. Re: Beverage Antenna Tuning ([email protected]) > 4. Re: Beverage Antenna Tuning (Ashraf Chaabane) > 5. Re: Beverage Antenna Tuning ([email protected]) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 4 Jul 2018 15:13:27 +0100 > From: Ashraf Chaabane <[email protected]> > To: [email protected] > Subject: Topband: Beverage Antenna Tuning > Message-ID: > <cajkwfxdkyqmtrrmki5uqj_pp0m0vfbzepbppymn0m+ydrz-...@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > 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?usp=sharing > ) > 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 > > > ------------------------------ > > Message: 2 > Date: Wed, 4 Jul 2018 10:18:47 -0400 > From: "Joe Subich, W4TV" <[email protected]> > To: [email protected] > Subject: Re: Topband: Beverage Antenna Tuning > Message-ID: <[email protected]> > Content-Type: text/plain; charset=utf-8; format=flowed > > >> What shall I do? > > Nothing? What you measure should have no practical impact on > performance. > > 73, > > ... Joe, W4TV > > > On 2018-07-04 10:13 AM, Ashraf Chaabane wrote: >> 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?usp=sharing >> ) >> 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 >> > > > ------------------------------ > > Message: 3 > Date: Wed, 4 Jul 2018 16:23:23 +0200 > From: <[email protected]> > To: "'Ashraf Chaabane'" <[email protected]>, > <[email protected]> > Subject: Re: Topband: Beverage Antenna Tuning > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > 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 <[email protected]> On Behalf Of Ashraf Chaabane > Sent: Wednesday, July 04, 2018 4:13 PM > To: [email protected] > 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?usp=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 > > > > ------------------------------ > > Message: 4 > Date: Wed, 4 Jul 2018 15:39:57 +0100 > From: Ashraf Chaabane <[email protected]> > To: [email protected] > Cc: [email protected] > Subject: Re: Topband: Beverage Antenna Tuning > Message-ID: > <cajkwfxcvv2ukxcs+wtj8hr9pfxyipwnj86hvoz0rfkmg-tc...@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > 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 <[email protected]> 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 <[email protected]> On Behalf Of Ashraf >> Chaabane >> Sent: Wednesday, July 04, 2018 4:13 PM >> To: [email protected] >> 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?usp=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 > > > ------------------------------ > > Message: 5 > Date: Wed, 4 Jul 2018 17:09:59 +0200 > From: <[email protected]> > To: "'Ashraf Chaabane'" <[email protected]> > Cc: <[email protected]> > Subject: Re: Topband: Beverage Antenna Tuning > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > Hi Ash, > > Some info: > > - SWR curve median will always slowly rise. > No action; this has to do with parameters which slowly affect at higher > freq. > That is rather irrelevant on the lowbands 160-80-40 > > - Termination +matching adjustment is optimal at 'minimal amplitude' of the > SWR curve > Meaning; the waves must be 'as small as possible'. > It might never be flat, I have never ben able to get there. Maybe others can > give better advice here. > But does it matter when not SWR 1? No. > > - Matching optimal beverage impedance to coax > Like when all is set optimal but the whole beverage antenna is not 450 Ohms > but 530 ==> stick with the 9:1 > Or, at a BOG where installation is near ground, impedance is abt 220 Ohms > ==> stick with 4:1 > A better matching is possible by altering the transformer windings. > But again, does it matter? > Can you make more QSO's? > I have not seen/read any proof on this yet. > > Please also note: > > Local environment, as well as length/install- height of beverage wire will > determin the 3D pattern > Local ground/air humidity will change performance slightly > > Adjusting F/B to local BC signal can be distracting because: > BC freq is out of band and a good F/B at <1600kHz does not mean it is now > optimal at 1830kHz as well.. > Groundwave BC signals arrive at 0 degrees; you want to adjust FB at incoming > skywave (10< >50 degrees) signals instead > What reference you should use depends on your QTH and the first wave of > incoming (Europe?) QRM > > I hope others, with more experience on this subject will have a better > answer here. > > In general, my experience is a beverage antenna will work rather quickly and > perform well. > There is just no bad-adjustment possible. > > 73 Mark, PA5MW > > > > -----Original Message----- > From: Topband <[email protected]> On Behalf Of Ashraf Chaabane > Sent: Wednesday, July 04, 2018 4:40 PM > To: [email protected] > Cc: [email protected] > 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 <[email protected]> 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 <[email protected]> On Behalf Of Ashraf >> Chaabane >> Sent: Wednesday, July 04, 2018 4:13 PM >> To: [email protected] >> 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 > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Topband mailing list > [email protected] > http://lists.contesting.com/mailman/listinfo/topband > > > ------------------------------ > > End of Topband Digest, Vol 187, Issue 3 > ***************************************
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