Can you describe a bit further how you are using the ropes in the trees; i.e., how your antenna is rigged? My Synthetic Textiles dacron rope is losing its cover (the black sheath) from rubbing in the
I am in Boston (Charlestown) MA. My suggestion is to place a pair of pulleys in your tree. The first pulley A is attached by tying it around a trunk or limb. This is a permanent installation. The tre
These same bolts can be obtained with a forged eye. (For those unfamiliar with this term, a "forged eye" is an eye that is cast as a solid piece of metal. A "formed eye" is one where a rod is simply
I haven't see the Big Boy so can't comment on specifics. However another possibility is that the bolts are stretching; i.e., they are too thin (and/or of the wrong material) for the load placed on th
Off hand it looks like an old HyGain 18AVQ vertical. -- Eric K3NA --Original Message-- From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@contesting.com]On Behalf Of mcduffie@actcom.net
Hi Dick -- Rope: One of the problems with rope guys is that many kinds of rope are quite stretchy. The purpose of guying is to keep the aluminum tubing aligned in a column; this keeps downward forces
It seems unusual to need that much braid. Braid is not always the best material to use in grounding as it can develop very high impedances. Could you explain the application in a bit more detail? --O
Hi Warren -- I would not bury braid for this application. Braid corrodes quickly when exposed. As others have pointed out, corroded braid develops a significant impedance at RF, which is not what one
During the 1980s OH8OS built a rotatable stack system on 20m that was truly impressive. As best as I can recall from a technical report, the array contained 48 or 64 elements (I can't remember which)
You can also try joining the Orion email reflector. http://lists.contesting.com/mailman/listinfo/orion Suggest you post this on the TenTec@contesting.com mailing list, or even on cq-contest@contestin
For heavy loads, consider rigging a 2:1 or 3:1 block system. Manipulating by hand a heavier ham antenna with a 2:1 or 3:1 system can be surprisingly easy and graceful. Use blocks of appropriating rat
Pardon me, but I'm a little slow at this. Isn't it true that, at the pole/pad transformer, your house's neutral is derived from the transformer's center tap and tied to earth ground? If that is corre
W1MK and I wonder if anyone can point us to an authoritative reference for an answer to these two questions: 1. An antenna model predicts a current of I amps at a particular segment on an antenna. Wh
Don Daso K4ZA came up with a cute trick to help install masts in towers. He describes it as follows in this month's "PVRC Newsletter". I think this is an important safety innovation in ham tower work
The gin pole sticks up about 11-12 feet above the top of the tower. A 20-24 ft mast is raised (by the ground crew), with the gin pole rope secured to a couple of spots straddling the midpoint of the
An auto parts supply store will be a convenient source of anti-seize compound. It comes in a small tube like toothpaste. This will prevent galling. It's relatively inexpensive (a tube will do many hu
I am puzzled by the following assertion: "...If you live on the seashore and have a moisture/salt/wind condition continually battering your antenna, you have to be a lot more selective in your choice
For a small diameter piece of tubing, a large quantity of rivets is not required. The purposes for multiple rivets are: -- reduce degrees of freedom for movement between the two pieces of tubing. As
My conclusions are rivets are a *very* poor method of securing elements, and antennas need dampers inside elements. 73 Tom == Hi Tom -- Rivets seem to work ok in lots of important structures. I think
Another way to let the pulley arrive very close to the top is to terminate the end with a Nicopress fitting. The fitting occupies about 1.5 inch of space near the thimble. This also avoids the "bump"