No, only at the feedpoint. Once I get the resistors changed I’ll try some
tests with the feedline.
Thanks for all the ideas. This thing may work yet!
Ken K6MR
From: Bob K6UJ<mailto:k6uj@pacbell.net>
Sent: Tuesday, April 26, 2016 19:04
To: topband@contesting.com<mailto:topband@contesting.com>
Subject: Re: Topband: Waller Flag construction and performance
Ken,
I am thinking along the lines as Gregg. Try disconnecting the feedline
at the antenna and compare noise levels.
Do you have a choke on both ends of the feedline ?
Bob
K6UJ
On 4/26/16 6:00 PM, Ken K6MR wrote:
> Good idea Gregg. I suspect there may be some common mode problems.
>
> I did discover one problem thanks to questions from K6UJ: the resistors on
> the loops need to be non-inductive and the ones I installed are not. Dumb
> error on my part. When I lower the antenna to change the resistors I will be
> able to get to the feedline connector. So that is something I can do easily.
> I also have more ferrites so I may add some additional feedline chokes since
> I have to cut the feedline loose from the mast anyway.
>
> Thanks,
>
> Ken K6MR
>
>
>
> From: Gregg W6IZT<mailto:gregg.w6izt1@gmail.com>
> Sent: Tuesday, April 26, 2016 17:34
> To: topband@contesting.com<mailto:topband@contesting.com>
> Subject: Re: Topband: Waller Flag construction and performance
>
> Ken:
>
> No directivity and noisier than the TX vertical. Perhaps you should look at
> these as two separate observations. Try disconnecting the feedline at the
> antenna. What is the noise level with the antenna disconnected and the
> pre-amp gain adjusted for 35-40 dB?
>
> 73
> Gregg
> W6IZT
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Ken K6MR
> Sent: Saturday, April 23, 2016 6:11 PM
> To: Clive GM3POI <gm3poi2@btinternet.com>; topband@contesting.com
> Subject: Re: Topband: Waller Flag construction and performance
>
> No it does not and that’s a good point. I’m pretty sure the vertical 800 feet
> away is not much of an issue, but the tower within 150’ could be a problem.
> The model is going to be difficult because there are four yagis on the tower.
> Good project for a rainy day.
> I have one other tower about 350’ away that also has multiple yagis but
> hopefully that also is far enough.
>
> The other option is to move it to one of the other towers and change to
> horizontal polarization and up higher. N4IS seems to prefer that orientation.
> At the moment the performance is so poor that I’m thinking I did something
> wrong in the assembly.
>
> Ken K6MR
>
>
>
>
>
> From: Clive GM3POI<mailto:gm3poi2@btinternet.com>
> Sent: Saturday, April 23, 2016 15:03
> To: 'Ken K6MR'<mailto:k6mr@outlook.com>
> Subject: RE: Topband: Waller Flag construction and performance
>
> on Locked="
> Ken, When you say the EZnec model looks great does that include the other
> towers.? If not include them and reassess.
> 73 Clive GM3POI
>
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Ken K6MR
> Sent: 23 April 2016 18:38
> To: Bob K6UJ; topband@contesting.com
> Subject: Topband: Waller Flag construction and performance
>
> Let’s start here and see how it goes. If someone complains we’ll take it off
> line. Nothing like a public discussion to bring out the best ideas. I
> changed the subject line so the discussion will make sense.
>
> The 160 transmit vertical is about 800’ away. There is an 80’ tower with
> various higher band yagis on it about 150’ away.
>
> My loop size is 12’ high, 10’ wide. 4’ between loops. Vertical loops. The
> boom is 50’ high. The tower is near the house, but single story house so the
> boom is 35’ above the roof.
>
> The EZNec model looks great (of course). The gain models a bit low, but the
> RDF and gain test are in the right ranges. Right now the big problem is no
> directivity and it is actually noisier than the vertical. I have the
> adjustable gain pre-amp from DXE (KD9SV design) in the shack.
>
> So that’s the background. Common mode problems would indeed be my first
> suspect. Interested in how you handled it.
>
> Ken K6MR
>
> From: Bob K6UJ<mailto:k6uj@pacbell.net>
> Sent: Saturday, April 23, 2016 11:00
> To: topband@contesting.com<mailto:topband@contesting.com>
> Subject: Re: Topband: The band sans noise
>
> rue" Name="index 1"/> <w
> Hi Ken,
>
> Be glad to. It took me a while to get mine working, found some basic things
> I needed to do and it now works very well.
> First a question. How far is your flag from the house and also an antenna
> tower or other metal structures ? I had to detune my tower it is only 40
> feet away from the Flag. After this we can go over the construction of the
> Flag and its feed system issues like eliminating common mode interference.
> Maybe it would be best to discuss this directly rather than the reflector ?
> I can be long winded. hihi
>
> Bob
> K6UJ
>
> On 4/23/16 10:42 AM, Ken K6MR wrote:
>> Interesting comments about the WF. I recently built one and so far it has
>> been a complete failure.
>>
>> Care to share the details?
>>
>> Ken K6MR
>>
>>
>>
>> From: Bob K6UJ<mailto:k6uj@pacbell.net>
>> Sent: Saturday, April 23, 2016 10:30
>> To: topband@contesting.com<mailto:topband@contesting.com>
>> Subject: Re: Topband: The band sans noise
>>
>> Bill,
>>
>> Sounds great ! hihihi A lot cheaper than a Pixel too !
>>
>> Until now I have kept my comments to myself about the Pixel.
>> I had a Pixel for a short time and sold it.
>> At the time I had electrical hash from one direction due to loose
>> hardware on a power pole.
>> It took forever for our utility company to fix it. I have a Waller
>> Flag for receive on 160 and it was very effective at nulling out the
>> power pole noise. I read all the rave reviews on the Pixel and
>> thought it would outperform the Flag for nulling out the noise and was
>> also curious how it compared to the flag on picking up 160 DX signals.
>> The Pixel did provide a nice null from the power pole noise but not
>> nearly as deep of a null as the Waller Flag. On discriminating
>> 160 DX from the band noise level
>> it was very poor indeed. The Waller Flag way out performed the Pixel.
>> I could hear DX stations with the
>> flag and could not hear them at all on the pixel when receiving
>> stations close to the noise level.
>> The Pixel would be suited for someone in an apartment or with a small
>> lot and doesn't have the room for a larger receiving antenna like the
>> Waller Flag. It is a compromise receiving antenna but we have to work
>> with what we have as far as room for antennas.
>>
>> 73,
>> Bob
>> K6UJ
>>
>>
>>
>> On 4/23/16 9:45 AM, william radice wrote:
>>> :::: I have an antenna of very similar design and performance. It is
>>> an all aluminum lawn chair on a pole.
>>> BILL
>>>
>>> On 4/22/2016 1:42 PM, Rob Atkinson wrote:
>>>> Throw bricks all you want to the end of time but you'll never change
>>>> the fact that we tested that antenna and saw its performance first
>>>> hand; The preamp was designed by Jack Smith at CliftonLabs..I'm sure
>>>> he'll enjoy reading your comments and get a good laugh.
>>>>
>>>> 73
>>>>
>>>> Rob
>>>> K5UJ
>>>>
>>>> On Fri, Apr 22, 2016 at 11:26 AM, JC <n4is@comcast.net> wrote:
>>>>> SORRY am not getting into this PR.. PIXEL loop is a low RDF and LOW
>>>>> performance receiving antenna, it is really snake oil.
>>>>>
>>>>> I'm out of this discussion.
>>>>>
>>>>> Regards
>>>>>
>>>>> JC
>>>>>
>>>>>
>>>>> In tests, the Pixel magnetic loop provided at least 20 dB null off
>>>>> the sides. From my experience, that is much better "filtering" than what
>>>>> would be had with a horizontal loop. Of course it isn't all in the
>>>>> antenna itself--a great deal of the success comes from the special
>>>>> preamp designed for use with the antenna.
>>>>> <<<
>>>>> _________________
>>>>> Topband Reflector Archives - http://www.contesting.com/_topband
>>>>>
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