For a horizontal distance of 45 feet, the guy wire will rise 30.34' (32 - 1.66) So for every foot of horizontal distance, the wire will rise 0.674' (30.34/45) For a horizontal distance of 14 ft, the
Go here: http://www.rohnnet.com/rohn-25g-tower Download brochure. Standard anchor designs are all in there for various heights and windspeeds. Raised anchors are another matter, and require either pr
I would use cable clamps and a piece of cable to secure the winch cable, then disassemble the winch, unseize the clutch packs with a hammer/screwdriver/chisel, reassemble the winch, and you should be
The rule is now LESS clear because Skimmer is mentioned. Is Skimmer allowed in broadband mode (to find EVERY CQ'ing station, on EVERY band), or only narrowband mode (used only as a single-signal code
The D40 is not resonant on 10, 15 or 20 meters, so the dipole should be ok parallel to the C3. I have a 40-2CD six feet above a KT-34XA, elements parallel, and all is ok. Those antennas have been the
Here is a neat mast calculator: http://www.math.niu.edu/KARC/mast/ Plugging in some numbers for 1.5" schedule 20 water pipe: Safety factor f 2 Wind loading factor k .004 lb/ft2/mph2 Maximum stress S
In my previous posting on this subject, the I.D. that I used for water pipe was actually for Schedule 40 pipe, not Schedule 20. Naturally, I spotted the mistake 5 seconds after hitting the "send" but
-- Safety factor f 2 Wind loading factor k .004 lb/ft2/mph2 Maximum stress S 40,000 psi Outside diameter D 2 in Inside diameter d 1.5 in Total length of mast 8 ft Height above support h 4 ft Antenna
The antenna is going to be 2' above the bearing? I thought you said 4' yesterday. That changes everything. I guess you didn't follow my inputs to the mast calculator. I give up. Dave Hachadorian, K6L
Here are the capacitor values for the ICE 419A filters: http://www.mediafire.com/?q62aq0sfk0aopkf That hyperlink is perishable, so go ahead and download the file if you think you might need it in the
I've seen plenty of these caps fail (a nearby ham has a pair of 419A's on RTTY) but have never seen one burnt to the point where you could see or smell it. Instead, the shunt caps that go to ground o
I was just poking around in the latest Rohn catalog, http://www.rohnnet.com/rohn-products-catalog , and was surprised to see that they are now making Rohn 45GSR, with solid side rails, with a 4-bolt
That's what I would do. Here's a procedure to test for interaction: http://lists.contesting.com/archives//html/Towertalk/2009-12/msg00333.html Dave Hachadorian, K6LL Big Bear Lake, CA . ____________
I use a Budwig HQ-1 Dipole Center Insulator: http://www.budwig.com/antenna-connector-insulators.html The sloping wire is connected to one side. On the tower side, I used a short piece of coax braid,
ICE 419 capacitor values are attached. In your case, it is probably the two 270 pf on the radio side (usually not the antenna side) that have failed. I recently replaced W7WW's 10 meter caps with thr
For those of you wanting the ICE 419A capacitor values, you can download them here: http://www.mediafire.com/?pmsy1w4eh5c4nhy Make sure you read the handwritten note at the top. That link will expire
This is classic TailTwister brake wedge binding behavior. An overhaul probably won't help. TailTwister owners have learned to click in the opposite direction first, to release the brake. Dave Hachad
So how are you guys using anchor bolts on an LM470? Has someone designed an LM470 mounting plate that fits on anchor bolts? Normally the LM470 mounts on a special base section that is buried in concr
Rohn used to make a 45G foldover tower, and had a 4-way guying scheme that had a small footprint. I think they made them up to 65 feet, and quoted windload specs. Maybe someone here has those old cat