You're supposed to use EHS leaders with Phillystran and you can measure the tension on the leader. I have tried measuring tension with a LOOS directly on Phillystran and surprisingly got comparable r
That mast has a lot of windload on it. John KK9A Check the climbing steps in these photos (Ames Iowa):? http://www.anwireless.com/ia1.html Warren; W7WY _______________________________________________
Why? I checked the tension on my HPTG6700 using a Loos PT-3 and the readings seems consistent with the tension on the 1/4" EHS leader. John KK9A <snip> BTW the only Phillystran you can measure direct
That is interesting data, Dick. I would expect the stiffness of the wire to effect the readings of a Loos gauge, but it's still fairly accurate and much better than tensioning your guy wires using no
So you're considering using Phillystran guy cable and your concern is that the Big Grip will unravel due to ice? Big Grips come with a small cable tie to hold it together, but it's a very weak cable
If you are rotating the entire tower you would have a tower bearing at the base and the structure below the bearing would be in concrete. If you are rotating only the upper part of the tower, then yo
For splices to 3 inch x 1/8 wall boom, I use 2 1/2" Schedule 40 6061-T6 aluminum pipe. The O.D. is 2.875 and the I.D. is 2.469. Then I have the O.D. machined to 2.735 - 2.740. John KK9A I am planning
The tolerances are pretty wide on extruded tubing (something like +/- .015 on the outside diameter and +/- 0.009 on the wall thickness), so whether is fits or not without machining is a crapshoot. Jo
Don't the two bearings that you have installed hold the weight of the mast leaving no vertical load on the rotator? John KK9A Hello T-T'ers, A long time ago, HyGain (Telex / HyGain) used to put a spe
You can use http://www.google.com to convert: http://lists.contesting.com/archives//html/Towertalk/2009-09/msg00479.html Sorry, the rotor/bearing mount plate actually weights about 62lbs and not 84lb
Cutting those areas will reduce the strength. The weight should not be much of a factor once it's mounted. The swing arm mount adds a lot more stress to the tree and if that is the concern, I would o
I don't know how I'd be able to build antennas without McMaster Carr! John KK9A Excellent.. McMasterCarr comes through again.. _______________________________________________ ________________________
I have used PVC pipe (which probably has a 3/16" wall) to insulate verticals from their mounting plate and ran a KW with no arcing problems. John KK9A Only 1/4" exposed? Not much of a gap for an ante
According to McMaster Carr's website -> The color is opaque white, also it's a poor electrical insulator and it's for indoor or outdoor use. It came up black on mine...<:-)) At-any-rate, Regular fibe
The weight of steel is approximately 0.283 pounds / sq inch. So 12" of 3" round weighs: pi * 1.5(sq) * 12 * .283 = 24 pounds John KK9A What does a 3" solid rod weigh per foot? And what do you plan to
I'm not sure how long your cable is, but this may not work for longer runs. John KK9A I agree on the urban legend. I used a single cable on mine. 2c/#12 and 2c/#18 shielded in one cable. It is the sa
I meant to say steel weighs 0.283 pounds / cubic inch. BTW, a solid mast is not much stronger than heavy wall tubing but a lot heavier. The weight of steel is approximately 0.283 pounds / sq inch. So
TowerTalk is for discussion of tower and HF antenna construction topics so I think that your post is relevant. That distance should be sufficient for pseudo-Brewster enhancement for at least some of
There are many many variations of TIC Ring Rotators and most of them have the motor on the left side and need to be attached to the tower on the right side. I am almost finished installing a new mode
Six elements on a 24 ft boom for 10m seems excessive - even for an OWA. If you change the taper or size of the elements it will change the performance. Another possibility would be to start with a Hy