0.750 inch diameter CATV Hardline has ~0.3+ dB loss at 30 MHz per 100 ft. 0.500 inch diameter CATV Hardline has ~0.5 dB loss at 30 MHz per 100 ft. Loss drops by the square root of frequency, i.e., mu
I've noticed this myself. My 5 year old Pentium / Windows 95 based computer has recently developed the nasty habit of crashing even more often than in the past. I suspect some of my outgoing messages
The shorter the vertical section of a loaded vertical, the lower the radiation resistance. I believe there is a curve of this in the later ARRL Antenna Books. Remember, a full 1/4 vertical over a per
My personal rule for Rohn Gin Poles is: NEVER EVER use a Gin Pole to raise antennas. Don't even think about it.... NEVER ! The reason is simple: The gin pole is designed for LIGHT VERTICAL LIFTS. ANY
I have an 80M inverted vee supported at the top of a 10 ft mast on my 130 ft tower where I installed a 3 ft cross arm with pulleys at each end. Near the ground, I attached a 5 lb 'window weight' to t
My personal rule for Rohn Gin Poles is: NEVER EVER use a Gin Pole to raise antennas. Don't even think about it.... NEVER ! The reason is simple: The gin pole is designed for LIGHT VERTICAL LIFTS. ANY
I have an 80M inverted vee supported at the top of a 10 ft mast on my 130 ft tower where I installed a 3 ft cross arm with pulleys at each end. Near the ground, I attached a 5 lb 'window weight' to t
Mel, If WIND and / or ICE is a considertion, you may want to find a source of 7/16 inch O.D. aluminum tubing thicker than the 'heavy duty aluminum foil' element tips provided by HyGain. BENT element
My friend KZ4V had a ground mounted HF2V with 120 radials (~35-40 ft). It played very well on 40M. It SUCKED on 80M (as a DX antenna) where the base loading made it pretty inefficient. For domestic u
I can think of two simple solutions using either a thick plate or angle aluminum or angle steel and appropriately sized U-Bolts or hose clamps. Tom N4KG ______________________________________________
"NEVER say NEVER" OK, I concede, for LIGHT antennas, raised VERTICALLY alongside a tower, I suppose it is OK to use a GIN POLE for the lifting fixture. Disclaimer: Anyone who bends their gin pole mas
A friend purchased two brand new TH7's a couple of years ago, assembled the elements, but never got them up in the air. He is moving now and I couldn't help but notice that 4 of the element tips had
A friend purchased two brand new TH7's a couple of years ago, assembled the elements, but never got them up in the air. He is moving now and I couldn't help but notice that 4 of the element tips had
One of my favorite wire antennas is a simple 20M dipole (34 ft total) fed with Ladderline. It has a figure 8 pattern from 10 thru 30 meters. Put up 2 or 3 of them at 40 to 60 ft and you will cover th
Joe, "TO DO IT RIGHT", I suggest you FORGET about house brackets and start thinking about a proper concrete base and GUY WIRES, per the Rohn book. As I have stated several times previously, "There is
Regarding placement of the 'tail' on an inverted L, I've have the 'feeling' that there is some cancellation in the direction of the tail. Consider a takeoff angle of 45 degrees, through the tail. Dra
I would recommend a Cushcraft D3W WARC band dipole and a Cushcraft D40 dipole for your 80 ft tower. These could be placed at 90 degrees to each other to provide good isolation. They will play VERY WE
For a short tower, the simple and safe solution is to use 3/16 inch diameter EHS guys with insulators at 3 and 14 ft from the tower. The first insulator needs to be very close to the tower since ther
I especially do NOT like limitations on "antenna support structures". Literal interpretation of such laws can prevent one from putting up a push up pole to support dipoles or VHF antennas if a tower
Re: "Non-Resonant Guy Lengths" FIRST, there is NO SUCH THING as NON-resonant Lengths when it comes to conductors. The commonly recommended lengths of 27, 40, 54 ft ARE resonant at 18, 12, 9 MHz respe