You mean, we shouldn't order tower sections "planed all round"? Here in the Land of Mixed Units, our house is built in feet-and-inches on the ground floor, but from the staircase on up it's all metri
Since you are in the UK, the best reference is: http://www.qsl.net/gm3woj/latticetower.htm Section 5, 'Grease'. -- 73 from Ian GM3SEK http://www.ifwtech.co.uk/g3sek __________________________________
Does anyone know how to install an inverted V antenna for 80m on a retractable tower? Is there anything that could be done to prevent the wires from laying on the ground when the tower is retracted?
Only for the multi-element yagis. The range measurements for the 2-element do not agree well with later modeling or measurements by others. NBS Tech Note 688 has a peculiar history. Although publishe
John, Threadlockers require ALL grease & oil be removed. Otherwise, they don't work. I've used Henkel/Loctite thread lock) in all sorts of applications. Properly applied, the ONLY way it lets go is
I put my jack under one of the rails, so I am not trying to bend the brace between the rails. PE1BTX used a pair of air balloons from a truck suspension. These could be inflated to give the tower a
know much a largely The radiation pattern of a Yagi is determined by ALL of the elements, including the driven element itself. As a volunteer editor for the German-English VHF/UHF magazine DUBUS, I
itself to some zero If these be a warrants the Can it be that some parts of www.g0ksc.co.uk and www.innovantennas.com are failing to load in your browser? These are two different websites. g0ksc.com
A fair point :-) But it's also fair to ask: "How long ago did your friends have problems, and which SteppIR antenna was that?" SteppIR have made many improvements in product quality over the past 12
All true; and with a well designed ferrite-loaded choke it is exactly the opposite. A common-mode (choking) impedance of several kohms can easily be maintained across a 2:1 frequency ratio. The big a
Below the feedline choke, the outside of the coax is (or should be) almost completely dead to RF, so it can then be taped to the metalwork without further problems. But taping the choke itself onto t
other antenna fatal It obviously isn't a fatal problem, but taping a coil of coax directly onto the boom will always UNbalance the antenna, more than balance it. If you use a ferrite balun for the b
There is a better way to use Coax-Seal, which the makers don't tell us because it uses only a very small amount per connector. The one good place to use Coax-Seal is to fill the small gap between the
would this side of Versatowers have only one locking device, a simple flapper plate at the top of the lowest section. The second section rests on this plate to take the strain off the winch cable af
Sorry, Rick, photographs of the Versatower lock plate on the web seem hard to find. There are verbal descriptions on GM3WOJ's information pages, <http://www.qsl.net/gm3woj/latticetower.htm>. Scroll d
For remote control of a Beverage antenna selector, N4ZR has had good success with sending the 300MHz control signals out along the same coax that carries the incoming 160/80m signals. That same coax
tiny the That's correct. Routeing the RF control signal along the coax will deliver far stronger signals than an over-the-air link, which wastes almost all the signal power in unwanted directions. I
went SteppiIR "home" It could have happened exactly as described. If the signal from the M0 station was arriving in a deep null in the vertical pattern of the higher antenna, then passive coupling w
This is how it should be done, with Swiss precision. <http://tx.mb21.co.uk/gallery/gallerypage.php?txid=840> These are photos of conversion of a British TV tower for digital TV. In Parts 1 through 4,
I'd agree with K9YC and N6RK that heating of the choke toroids is not the issue... but your remark about "RFI from 6m" raises a warning flag. A yagi on a tower should never be a particularly tough co