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:k...@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.w6i...@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-boun...@contesting.com] On Behalf Of Ken K6MR > Sent: Saturday, April 23, 2016 6:11 PM > To: Clive GM3POI <gm3p...@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:gm3p...@btinternet.com> > Sent: Saturday, April 23, 2016 15:03 > To: 'Ken K6MR'<mailto:k...@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-boun...@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:k...@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:k...@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 <n...@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 >>>>> >>>> _________________ >>>> Topband Reflector Archives - http://www.contesting.com/_topband >>> _________________ >>> Topband Reflector Archives - http://www.contesting.com/_topband >>> >> _________________ >> Topband Reflector Archives - http://www.contesting.com/_topband >> _________________ >> Topband Reflector Archives - http://www.contesting.com/_topband >> > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband