There are hundreds of installations of 2L40's 10 to 14 ft above tribanders on 2 inch O.D. 1/4 inch wall STEEL Masts with yield strengths over 90,000 psi. I've forgotten the yield strength of aluminum
I know of TWO towers that fell full length from cables pulling through TWO cable clamps and heard of a third (120 footer) where all but the BOTTOM set of guys pulled out just after the tower was inst
There are hundreds of installations of 2L40's 10 to 14 ft above tribanders on 2 inch O.D. 1/4 inch wall STEEL Masts with yield strengths over 90,000 psi. I've forgotten the yield strength of aluminum
I'd guess that I have around 200 of the 'smaller' insulators installed in my 3/16 inch guys with PLP Dead Ends (guy grips) on 7 towers ranging in height from 40 ft to 135 ft. I 're-form' the radius o
I know of TWO towers that fell full length from cables pulling through TWO cable clamps and heard of a third (120 footer) where all but the BOTTOM set of guys pulled out just after the tower was inst
I use the FIRST stripe since the spacing of the grooves of the small insulators only about 1.25 inches, roughly equivalent to modest sized thimble. Tom N4KG __________________________________________
Good points Bob. Remember, HAND tightening of PL259's is NOT sufficient, especially where temperature variations are prevalent. Another place to check for a tight connection is the screws that connec
K4AB has a pair of 205BA's at 40 and 90 ft on a 90 ft R25 Tower (plus a 2L40 above it on a steel mast). 50 ft spacing seems to work well on 20M. The Low Beam plays very well during high angle mid-day
I notice that a number of TowerTalkians refer to the "traps" in the CC 402CD. There are NO TRAPS in this 2L40 Meter yagi. They are Loading COILS. Tom N4KG ____________________________________________
I would put the 2L40 on TOP for both electrical and mechanical reasons. I find that 10, 15, and often 20M antennas SUCK during midday hours when placed at 70 to 100 ft compared with lower antennas fo
Element droop on the 402CD can be reduced considerably by DOUBLE Walling the first piece of tubing in each element. This will also raise the wind survival from >70 MPH to <90 MPH. I also recommend pu
My experience with galvanized steel wire in Beverages and as radials is that they RUST OUT in a few years. ALUMINUM Electric Fence Wire is also now available and should last longer. Take precautions
My experience with galvanized steel wire in Beverages and as radials is that they RUST OUT in a few years. ALUMINUM Electric Fence Wire is also now available and should last longer. Take precautions
My experience with galvanized steel wire in Beverages and as radials is that they RUST OUT in a few years. ALUMINUM Electric Fence Wire is also now available and should last longer. Take precautions
While the SteppIR does have a fixed 16 ft boom length, that is NO WORSE than any of the popular 3L tribanders such as the A3, TA33, TH3, HG Explorer on 14 ft booms or the CL33 on an 18 ft boom. The .
OR, they could put 4 elements on a 24 ft boom... OR, they could put 5 elements on a 30 something foot boom... Tom N4KG ________________________________________________________________ Sign Up for Jun
SO WHAT? IF you optimize an antenna for F/B it will NOT be optimized for gain. IF you optimize an antenna for GAIN, it will NOT be optimized for F/B. IF you optimize for SWR (assuming split dipole fe
My vote for the optimum antenna system is for: 4 High Stacks of 6L Monobanders on 3/4 WL booms spaced equally on 3WL high rotating towers, for EACH band, with ALL combinations instantly switch select
N4KG responses inserted below. My point exactly. I expect everyone's idea of optimum depends on their own persepective. point to The 6L models on 0.75 WL booms in W2PV's Yagi Design Book show a -3 dB
Forwarded with permission from N6BV Tom: Fig 23 in Chapter 22 was corrected in the third printing of the 18th Edition of "The ARRL Antenna Book" and is correct in the 19th Edition. (Actually, I think