Yes, I think their desks are all exactly 5 feet apart from each other.... _______________________________________________ _______________________________________________ TowerTalk mailing list TowerT
I've used automobile scissors jacks (old GM and Datsun/Nissan ones, for example) to realign the ends of Rohn 25 and 45 sections. "Buffer" the jack-leg interface with short pieces of 2 x 4. I've done
Does anyone have any experience with putting up an 80 or 40 meter vertical in a swamp? I have a swamp of about an acre and a half that contains rather thick undergrowth and trees that are old but not
Adding a garage door spring of the appropriate stiffness at one end of my 80-meter dipole seems to help protect the dipole from the effects of its support branches whipping around in the wind. The us
Be aware that there is an error in Figure 1 of the article referenced below. In Figure 1B, the curve of current versus position along the flattop is correct only for the center half; current polarity
This sounds similar to a problem discussed many years ago about hum induced in receivers by the TailTwister T2X rotor controller when the brake solenoid was activated. As I recall, the "quick" soluti
I agree with Steve -- at least for reasonable guy wire angles. Consider the case of horizontal guy wires. With horizontal guy wires, high winds add no downward force on the tower legs; the only downw
Uhhhh, isn't there an oxymoron buried in there somewhere? _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.c
I've used a garage door spring on my 80-meter dipole for about a decade now. Seems to do a good job, although I have plain old #10 copper wire so it's possible I now have a 90-meter dipole.... My loc
So if the choice is one of buying either a VNA or an airplane capable of dragging a "sense" antenna around, you make the decision a lot easier for me, Jim....:-) Bud, W2RU ___________________________
There's one other way Rohn 25 and 45 differ from each other: They're different lengths. Each standard Rohn 25 section is a total of 10' 0" end to end, so when you build a tower, the tower height is N
Since "clear-cutting" isn't legal around here, I can only offer another "unscientific" opinion (although I think "heuristic" or "empirical" sounds better): At my previous QTH here in upstate NY I had
Connectors? Have you never heard of Red Green and duct tape? Bud, W2RU _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk
Absolutely NOT! Rohn (ca. 1987) allowed ordinary Rohn 25 to go to 40 feet unguyed only if the antenna load was under 1.5 square feet and the wind speed 70 mph or less, with no ice. For 90 mph, Rohn d
Yes, Tom has given us the location of the latest Rohn catalog data. The link titled "Allowable Antenna loads for free standing guyed towers" takes you to a pdf of the same chart that's in my 1987 cat
And in my experience a LOT more susceptible to false triggering by RF. Bud, W2RU _______________________________________________ _______________________________________________ TowerTalk mailing list
I believe the primary mechanical difference is the use of the cast aluminum tilt-bracket boom-mast clamp in the DXX, compared to the DX's pair of plates similar to the boom-element brackets. I only h
I can see it now -- just like the stories of copper plumbing being taken from vacant houses, shortly we'll be reading in the newspapers about double-hung windows disappearing from houses in neighborh