Larry, I have a better idea. I have a 14 element Hygain 2m beam. I installed a TV antenna rotor mounted horizontal at the midpoint of the Boom and rotate the beam vertical for FM and horizontal for
Larry, I don't have a sceintific answer for you, just practical experience. I have the rotor mounted sideways off to the side of the mast. So the elements are out in the clear when in the vertical po
Randy, I have a 90 ft run of PVC underground from the wall behind my radio room to a box mounted about 4 ft up on the tower. I installed a small multi-braid nylon pull string. When I need to pull cab
Glen, I striped the coax about 6 inches back and removed the center insulator. I then twisted the center conductor and shield together. I inserted this thru the rope braid about 6 inches from the end
Read the fine print at the bottom. It says "Three" batteries. (4.5V) That way they can sell you 2 two packs...(:-> I bet the cheapest way to go would get a sidewalk solar light at a Big Box store and
Cal, I have used inverted V's and half slopers for the past 40 years on my towers. I have had mixed results, however most have been successful. On my Current 50 ft tower I use the top guy wires as ha
Comments embedded.. Dave, I apologize if I stepped on your engineering toes. That was not my intent with my candid remarks. As usual, conjecture can bring out the best or worse of us. Agreed. I don't
- There is an antenna program by N4UJW called QY4. Its at: http://www.hamuniverse.com/yagibasics.html This is an old DOS program but works ok in windows. In the QY4.zip file is a program QY4Util.EXE.
Dick, I have wound several this way. I have one on the base of my Screwdriver antenna using computer cable. It gives you a real neat coil. In my case it works very well. I used the heavy flat cable w
Doug, I have a copper tri-band (144/220/440) J-Pole on top of my mast. I made it using 1/2 in. hard drawn copper with regular water pipe "T" and "L" fittings with a cap on top. I have it mounted to t
Rick, I did not elaborate on the tower/coax grounding, because it was not the question. I basically just responded to the query about using a J-Pole on top of the tower. However, since you have raise
Jim, Sorry I left out the mentioning the AC Power grounding. The ground rod that I installed before they poured the slab is the Power ground as well as my common Radio ground. My AC power comes into
Google shows this one on Microwave attenuation: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V2B-4T6BDVF-2&_us er=10&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_searchStrId=9
Dennis, I would suggest you check with Norms rotor service. He should be able to tell you if the two controllers are compatible. If the control box wiring is the same, then the only issue might be th
interesting concept.....However, being practical, you can sure buy a lot of guy wires for the price of a Segway. * 73's Jim W5IFP * _______________________________________________ __________________
Larry, My tower is 100ft from the house and I run my cables underground in schedule 40 PVC. The Black pipe is ok and cheaper, however it is vulnerable to shovels and can callapse from heavy weight su
It could also be an "American" Special Series (SS-5) tower. It looks like mine (except for the rust). I have had mine about 30 years and it was a used one when I got it. Its a very sturdy tower. I bo
I recommend 6 or 8 pin automotive trailer connectors. They are heavy duty and do not require soldering. You can get the WX proof kind with the rubber cover, However, I would still recommend taping th
Ed, I would look at a good picture of an assembled AV-640 before you make a decision. It has top hat spokes that vary from 6 in. to 48 in. It also seven 72 in. Counterpoise whips at the bottom. Its a