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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