I am happy to inform all friends that a project of last 4-5 years was completed during the last weekend at ES5TV KO38CS central ES QTH and a double H frame on 15m was finally erected what is probably
See the full 2-day gallery at: http://pontu.eenet.ee/es5tv/ Impressive! I wonder how well that'd scale to 40 meters and what tower height would be required. 73 Roger (K8RI) Go to the last 16th page i
Considering that 40m is 3 times 15m in wavelength +/- a smidge, looks like 210m tower to me. Gotta win the lottery two or three times to do that one! 73 Don N8DE On 9/25/2012 2:47 PM, Tõnno Vähk wrot
I was going to ask why the horizontal stacking was used, which narrows beamwidth, but then I see that my question had already been answered: This is a great feature. At last we can work Europe from t
LOL..East Coast curtain/West Coast curtain, we have to deal with both from the "Black Hole" :-). 73, Jim N9WW James Chaggaris President PowerOne Corp./PowerOne Environmental 2325 Dean St. Suite 200 S
That doesn't count having to build a new home well away from the airways to keep the FAA happy and in an area without tower height limitations. Yet stay some where near civilization.<:-)) Well, maybe
Tonno ES5TV posted: <email link to pictures of a monstrous 15m array of 8 x 15 ele yagis in a 2-D stack on a 70meter tower> - an impressive engineering feat! Roger K8RI asked: Don ND8E replied: I say
<email link to pictures of a monstrous 15m array of 8 x 15 ele yagis in a 2-D stack on a 70meter tower> - an impressive engineering feat! Roger K8RI asked: I wonder how well that'd scale to 40 meters
Great job Tonno, this is an amazing array! Certainly much effort (and money) went into the design and construction of this system. The 3dB beamwidth of 30 degrees is not bad considering that you have
After studying this a little more, I do not think that the beamwidth can be easily changed with switching. In a model I tried driving only one side of the array and the pattern looked similar to the
On 9/26/12 10:16 AM, john@kk9a.com wrote: After studying this a little more, I do not think that the beamwidth can be easily changed with switching. In a model I tried driving only one side of the ar
On 9/26/12 10:16 AM, john@kk9a.com wrote: After studying this a little more, I do not think that the beamwidth can be easily changed with switching. In a model I tried driving only one side of the ar
That is a good point Jim. I removed the "source" from the four yagis on one side of the array. I believe that EZNEC sees this as a short. I could place a small gap in the middle of the DE and see wha
Yes.. removing the excitation essentially leaves the feed shorted, since the excitation is in series with that segment. _______________________________________________ ______________________________
Tonno, Simply amazing... thanks for the detailed explanation... Enjoy!! Felipe NP4Z --Original Message-- From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Tõnno Vähk Sent: Tuesda
Very effective patterns to NA/SA, JA/NA or JA/ZS at the same time will be made available by switching the 4 high stacks out of phase. 73 Peter, DJ7WW After studying this a little more, I do not think