NO WAY is it safe to free stand Rohn 25 to 50 ft. INSANE IDEA unless you have a death wish. Tom N4KG ________________________________________________________________ GET INTERNET ACCESS FROM JUNO! Ju
Here's another N4KG 'NEVER DO' NEVER use a House Bracket to support a non-self supporting tower, unless you have at least one set of guy wires 30 ft or less above the bracket. Besides the Vibration /
HUH? The 1/4 inch Nylon support ropes for one of my 80M dipoles finally broke (at the pulleys) after 20+ YEARS of service in the Sunny South. I don't consider that very 'FAST'. Stay away from the CHE
Do you consider 15% to be a SIGNIFICANT increase in strength? I don't. Worst case for a 3 way guy arrangement is at 30 degrees to any one of the guys. Force in the guy is equal to the in line force d
A long mast above the top of a tower creates a BENDING MOMENT in the upper section of the tower that is transmitted throughout the tower. I have seen installations with 18 feet of mast above the towe
Place the guys as far out as your roof extends. NO FURTHER ! Corollary 1: ANY GUY is better than NO GUY. Corollary 2: For a short tower with a modest load, guys can be placed fairly close to the towe
Which can be readily verified by ANYONE simply by looking at the SCHEMATIC in the manual and tracing the limit switch contacts back to the connector. Tom N4KG ________________________________________
Roger, I politely suggest you do the CALCULATIONS to determine EXACTLY how much benefit there is in 4 guys vs 3 guys. At 5 degrees off line, the IN-LINE wire carries 99.6% of the load. NOT much help
QSL Roger. I believe the REAL reason Rohn was able to specify CLOSER SPACING for the Tiltover Tower Guys is the fact that Tiltovers were limited to 68 ft MAXIMUM Height and modest antenna weights whi
While the GUY WIRE 'capability' of a 50 ft (to 70 ft) R25 tower guyed with 3/16 inch EHS may exceed the rating of a screw anchor, the actual LOAD is quite a bit LESS. A 12 sq ft antenna in a 30 psf w
Interesting Story Jim, supporting my earlier statement to "Never Say NEVER". It IS important to note that your installation has ONLY 17 ft of tower above the 'house bracket' vs. the 30 ft or MORE tha
Except that R20 is made if the next SMALLER thickness sheet metal and only about 60% as strong as R25. Other than that, they have the same external dimensions. (Wish I could find my R20 data sheet !
Note that Mike's 4 X 4 wooden base under a flat plate is also another EASY way to achieve an INSULATED Base for direct feed of the tower as a vertical. With guyed towers, there should be ZERO lateral
SNIP The BEST time to install screw-in anchors is after a good soaking rain :-) Rocks are a bummer. If the anchor is only partially in the ground, it may be necessary to try remove it and try a sligh
Allen Bond stocks many sizes of Fiberglass rod and tubing. I don't know if he carries Teflon but he may be able to direct you. Allen Bond Max-Gain Systems Work: 770-973-6251 Fax: 815-461-7730 E-Mail:
Makes sense to me... I notice that damaged places on my trees do NOT rise with age... the bark eventually grows over the damaged place. BTW, sometime ago, a knowledgable tree person posted on TowerTa
Two options come quickly to mind, either PVC (I believe some types are better for RF than others... GRAY seems to be popular among antenna manufacturers) or pressure treated wood. Scotch 33 or 88 ele
I expect the best choice would be either STAINLESS STEEL or GALVANIZED. Who would use a LARGE COPPER Bolt? Standard Cadmium Plated hardware will rust in a few months. Tom N4KG _______________________
Actually, I believe the direction of rotation would be OPPOSITE the direction indicated on the control face. Think about it: The BOTTOM is FIXED, and the TOP is rotating Clockwise (CW) now, if the TO
You do NOT want any conductors over 12 ft long between insulators anywhere near an antenna for 10M. Note that the first insulators must be less than 5 ft from the tower to meet this requirement since