You would think this simple antenna should give one no problems. Wrong. Maybe some expert here can help solve this problem. Unfortunately I can mount it only up 22' on a chimney mount. Currently fed
Thanks to personal replies from several of you, a satisfactory solution has been found. Adjusting the Y dimension outward 1" was the answer. It moved the 10M band SWR curve to a resonance at 28.000 b
Guys, I have various pieces op phyllistrad and wish to use it for boom support and other purposes. Need to know the proper size U clamps for: T1200 HPTG 2100I HPTG 4000I I haven't had any luck determ
Thanks info guys. Having an interesting time determining clamp size for T1200. It has an OD of .17". It seems that an 1/8" (.125") clamp would be too small. That leaves only 5/32" (.156") clamps if t
Hi Jay, That's it. Many years ago I installed a Glenn Martin 70' aluminum tower which used 4000I philly and used cable clamps. Perhaps it was wrong engineering but the tower stayed up. No doubt being
Here's my take on this. Unfortunately coax has to really bad to tell that it is with the usual instruments available to most of us. One is generally trying to measure losses in the <1 to maybe 1.5 db
I ran into this here. What he wanted was in direct contradiction to the engineering specs regarding the rebar cage. Solution. Get it signed off, quickly put it back to Rohn spec and backup the cement
Question: None of the tower sections are Cadwelded. They are bolted together. How is it that these bolts make an adequate lightning connection but one "has" to Cadweld the ground wire to the tower at
I agree with John G4ZTR: Don't just hang a messenger wire (what your steel wire is called) onto your tower and load it with coax and control cables without considering the sideways force this will im
There is a program which you can use to estimate the side load on the tower. Look at the following link. http://www.spaceagecontrol.com/calccabl.htm?F=75&a=85&q=0.200044091&g=32.18503937&Submit+Butto
I don't know if HTTA has any arrival angle data for 6M. It's predecessor YTAD did not. Without arrival angle data how would you know some antenna height change is good, bad or indifferent. I seem to
This has been a nightmare. I got a new TH-2 a few months ago. Mounted on the roof at 22'. 10/20M behaved as expected. Tuned for the CW segment. 15M had a high SWR at the low end of the CW band. I tri
I may be wrong but I believe one has to know the complex impedance of the mismatched load before doing anything. This is the real problem as most hams can't measure anything but SWR. There are lots o
Came late to this thread. Running slow, baring mechanical binding usually is caused by defective motor capacitor in control box. Replacing it does wonders. 73 de Brian/K3KO Before you do anything, wh
You might also consider the total coax length of each option. You don't say what frequencies you plan to operate. However if 6M and above an extra 75' might introduce significant extra loss-- dependi
I guess the rest of the earth is flat. With the uneven terrain around here no way pre-cut guys would work. Also there is a likelihood that where you try to screw in an anchor, you can't because of ro
The problem of "towers" walking them selves up from the ground is something the utility companies have a lot of experience. It seems that wind direction changes exert forces on one side and then anot
Guys, I really don't know why these wildly varying multiple lobes is a big surprise. Astronomers have been horizontally "stacking" antennas for more than 50 years. Some of the baselines are as large
Once the discussed towers are measured, it would be interesting to know what the conclusions are. The eye is easily fooled with regards to verticality. Even the Romans knew this. The columns to their
John, I can tell you it cannot handle a 3 element tribander. Way back when my TA-33jr continually stripped its gears. The rotor has no brake. I went through about five sets of gears before getting ri