Why not ask CUSHCRAFT? I'm sure they have lots of them :-) Hint: Have you notice the similarity to their 2M antenna elements? Tom N4KG On Tue, 22 Oct 2002 08:14:45 -0400 k4oj <k4oj@tampabay.rr.com> w
Option 1 BUY some replacement trap end covers directly from the MANUFACTURER. Option 2 TAPE the cracked covers with Scotch 33 (or 88). It is a good idea to do this BEFORE putting the antenna up in th
I *assume* you mean an 80 FOOT trylon self supporting tower. You neglected to indicate on what FREQUENCY you are trying to match the tower. It should make a GREAT shunt vertical for 160M where the to
I once had a pair of inverted L's for 80 and 160 supported at 50 ft by a rope between two trees with the tails going in opposite directions. They were spaced several feet (5?) at the top and connecte
The voltage across the capacitor will depend on how much capacitance is needed to tune the antenna and the power applied. Plate SPACING will also be a factor in breakdown voltage. I had NO problem wi
A quick look at any of the major antenna manufacturer's catalogs or websites would reveal 40M dipoles made by Cushcraft, Force 12, HyGain, M2?, and possibly others. Some of them also make 30M or 30,
And people wonder why I keep preaching that there is... Nothing Stronger, SAFER, or more Cost Effective than a properly GUYED Tower. Sorry for your injury. Tom N4KG __________________________________
AH, yes, a dipole that covers BOTH 30 and 40M gets a bit tricky. The usual trap isolator would require a FULL SIZE dipole on 30M which is ~50 ft plus extensions for 40M, making it nearly full size on
Boom matching as a rotary dipole on 30 and 40M works VERY WELL. I have used a matched 24 ft boom on a TH6 on both 30 and 40M (separately). It 'should' be possible to use two matching arms, one for 30
You neglected to provide a NECESSARY piece of information, namely the DISTANCE to the Guy Anchor. The formula for the hypotenuse (L) of a triangle formed by the tower base, guy point on the tower (H)
To make conductive Guy Wires 'nearly invisible', they need to be LESS THAN 0.3 Wavelengths Long at the HIGHEST Frequency of interest. Tom N4KG ________________________________________________________
SNIP about NEVER place the first insulator over 5 ft from the top of a tower. Remember, there is continuity from the insulator, *through* the tower, to the first insulator on the other guys. (e.g. 5+
That (anchor radius = 80% of tower height) is the standard Rohn recommendation. Closer spacing is viable for shorter towers and / or smaller antenna loads. For a 130 ft 160M vertical with NO top load
MAJOR OOPS.... the mentioned 130 ft towers have their anchors spaced 65 ft from the tower, NOT 35 ft as posted. Sorry for the error. Tom N4KG _________________________________________________________
As I am fond of saying, "You can never have too many antennas". Sometimes the 4 square will be best, sometives Beverages will be best. It helps to have BOTH. Tom N4KG On Tue, 29 Oct 2002 17:45:38 +01
For fixed directions, attaching a SMALL tribander to a tower leg seems to work fine. I have a TH3 attached at the mid point of an 80 ft tower aimed at SA / Carib (plus other sidemounts). Put a PVC sl
A TRAP is a TUNED CIRCUIT consisting of a coil and a capacitor. The ATB34 used a coil and a capacitor consisting of a short piece of coaxial cable, using the cable capacitance to tune the coil. Moder
A TRAP is a TUNED CIRCUIT consisting of a coil and a capacitor. The ATB34 used a coil and a capacitor consisting of a short piece of coaxial cable, using the cable capacitance to tune the coil. Moder
I favor the 2 Tower approach. Then you could always add a third tribander at 40 ft on the 70 footer. I would also suggest a STRONG 20 ft mast (8 - 10 ft inside the top section) and a 2L40 on top, or
I like 1/2 inch (soft) braided nylon rope. It is available at most good hardware stores. Specialty rope supply places may have better prices, especially if you buy by the spool. Look in your Yellow P