I see no mention of RG 303 and wonder if that's been discontinued. for jumpers I'd use 213. If you need a tighter bend radius I'd re-arrange or re-locate the connection points instead of using skinny
When you have a structure in the radial field that you can't go under or remove, the standard broadcast practice is to strap around it. Let's say you have a small square shed on a concrete foundatio
Let's get on the same page regarding parallel wire feedline terms first. Balanced line usually takes three forms: Window line: the brown plastic stuff, 450 ohms nominal, with punched out rectangles i
Broadcast stations on medium wave use copper mesh around their tower piers, extending out around 20 feet, in cases where the tower is voltage fed, i.e. around 190 degrees. In those cases the v. at th
If the ground system is at or below grade, you don't need a choke. If you find you do need one then that means you don't have enough radials down. This is an example of ham antenna work where it is u
<<<AND because they don't have to LISTEN on that antenna.>>> Well, no one should be using a vertical antenna for receiving, especially on 160 and 80 m. They are usually untenable in cities and suburb
<<<And in your situation, I'd strongly consider offering to buy your neighbor a new LED TV.>>> I tried that but it's a moot point. They moved to Texas last year. 73 Rob K5UJ _________________________
Where does the idea come from that a grounded tower holding up an inverted L is a problem. Is this just some notion that took hold? The tower is some how an RF sponge? Hams have been doing this for d
https://hamwaves.com/inductance/en/index.html#input Rob K5UJ _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contestin
I've been told a lot of the copperweld problems today are due to modern copperweld plating being cheap and no where near the thickness of your dad's copperweld. The wire from say, 70 years ago is non
Leg insulators are not the way to go for a 160 m. hot tower. You need a tapered bottom section on a single point Lapp or Austin insulator that fits on a pin base attached to a concrete pier. To get a
It is indeed a function of height and face width; a short wide tower is less at risk for leg strain than a tall skinny one. Any tower will have the problem of compression and expansion on the legs wi
I'd also put RF chokes in series with the DC relay lines, at the base of the vertical antenna to further keep RF off it but also to break it up so the relay line doesn't detune the 80 m. vertical, pe
Sorry, I sent that to the wrong email list. Rob K5UJ _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com ht
heh heh, I guess you wouldn't like my brass banana plugs and jacks and open wire line. 73 Rob K5UJ _______________________________________________ _______________________________________________ Tow
My guess is it's a term imported from the non-ham world for what we OFs used to call patch panels. 73 Rob K5UJ _______________________________________________ _______________________________________
Have you tried Norm at Norm's Fabricating? I'm sure he could give you an estimate. http://www.normsfab.com/ He'll be at Dayton. He's there every year. 73 Rob K5UJ ____________________________________
I also have my 160 m. feedline laying out on the ground (LDF4-50) and nothing has ever bothered it. It's been out there for 10 years. I'm more worried about humans than I am about animals. By the way
I have news for you, there IS a tower talk web interface: http://lists.contesting.com/archives//html/Towertalk/2019-08/msg00143.html It's how I read this email list. Rob K5UJ _______________________
If you want to see what could happen with tower talk in a web forum environment all you need to do is look at some of the forums on qrz.com. The ability to post graphical content has led to a vomitin