-- ground rod. Not because it is a lightning path but because it will corrode will crack the concrete. the tower but it should all be tied together in the concrete so that there is >no arcing from on
USED ON THIS TOWER. ANENNAS SHOULD BE LIMITED TO THOSE HAVING A MAXIMUM BOOM There are a lot of Rohn BX type towers around these parts, and most of the amateur towers have much longer booms on them t
Peter, The K9AY loop does work against ground so it needs a ground system. Install radials under the array, eight should work fine, although overkill never hurt anyone. Use whatever you have in the
an thru feet) I would be surprised if you ever get this running right at 1Gb speeds. Gigabit speeds on Ethernet are really fussy and very susceptible to interference. The only thing you have going fo
EE for 44 of them, and I've never seen one. Inquiring minds would like to know. >>> Hint: It's a myth. Jim, I don't know either, but MFJ claims to have an artificial one ! Jim, KR9U ________________
I have had Phillystrand installed with cable clamps for about 17 years now. I installed it when they did recommend using cable clamps. Some is the 6700 and the rest is the next size down. Should I be
in the process. I've had customers help me with installs and pull too hard on the cable not giving me time to straighten it out before it hits something and kinks. Not at all as critical as coax is.
Kevin, I agree. We tried using Cat5/e on a 1 GHz link that had to run at 1 GHz or it would lose sync. We couldn't get anything even close to reliable beyond about 12 ft, with fresh straight runs. The
Rich, Check the voltage regulators in the control box. I had a similar problem and one of the regulators was open and the voltage was varying causing very erratic readings. Jim, KR9U place. It zeros
150 ft towers with 4 high stacks on 10, 15, 20 fully selectable. On 40, 180 ft Stack of two or three. Yes, 40 is a horizontal band. Full size 4 square on 80 and 160. Beverages every 45 degrees. How
I would also be interested in a model of the TH7, and the TH6 if possible. I would also be willing to provide the space for file storage as well on my web site. James B. Wolf Wolf RF Systems 2415 Uni
Tom, I'd go with the pier pin or a rooftop base on a flat cement slab. Use long bolts in the cement to bolt the rooftop base to. I see no value in sinking tower sections in cement. Jim, KR9U ________
Jorge, The loading coil should measure very low resistance, less than a couple ohms. I would replace the screws that hold the wire to the elements in the loading coil with Stainless. Unfortunately, y
I haven't read all of the replies yet, but Teflon is a poor structural material. If under compression or expansion it will move. It "cold flows" substantially, like an extremely thick taffy. I used i
Al, What I have done with my HDR-300 is to make East the center. If you go West of North, the display reads negative, so that it reads -90 degrees. (-90 degs is the readout limit going CCW). When poi
Actually, one of the best reasons to connect the tower base to rebar is that it will help with lightning surge dissipation. Around these parts, the water throughout the winter and spring can actually
--Original Message-- Although I have no qualitative data to support this theory, the thought is that the tall tower and antenna elements dissipate to ground static charges in the vicinity of the towe
You might consider a worm gear winch. It won't spin out of control if your hand sides off the handle. It's also very simple to hook up a 1/2 or 3/4 hp motor. http://www.fastenal.com/web/products/deta
Rick, A friend of mine, AF9Y, used this wench with a 1/2 hp, 136 RPM motor. He has an aluminum tower ~80ft and says that it is enough motor, but there is little reserve. It is mounted on a plate that
Daryll, Make sure to check the output of the regulators in the control unit. I have had the +5V regulator fail twice. The symptoms are the same as you are describing. Jim, KR9U Hello to all name hr D