Hi Tom, I think we are in agreement here. But as I read your post exactly what you meant was unclear to me (and probably to others). I think you said (and meant) that compared to a sufficiently dense
Hi Tom, To: <towertalk@contesting.com> Snip... The load reactances will be evaluated at whatever frequency you run the model. A frequency rescale will not rescale the load network component values. H
To: <towertalk@contesting.com> Right you are Clive! I had just assumed that Tom would enter guy wire diameters in inches rather than as AWG numbers. So, what is the AWG number for 5/16" EHS guy wire
Hi Bill, I have been looking for one of these for a long time too. It only seems fair. After all the women have had the functional equivalent of this device for other sex for a long time now. But why
To: <towertalk@contesting.com> Does the ARRL book really recommend a 4:1 balun with a hairpin match? I'd expect this to be a 1:1 balun. Yes. Can't say. Its a possibility. But... Have you tried them w
Hi Lane, I have one of the MFJ 1796 loops. I have also been involved in debugging several other local ham's problems with small loop antennas in this area. Most of the problems were with AEA Isoloops
Hi Mike, Not to try to give any specific advice beyond "go seek out a PE", I just went through this exercise (using a PE) for elevated guying of 70 feet of Rohn 55 with a 30 sq foot wind load at the
To: <towertalk@contesting.com> I'll bet you two nickels that little if any of the current flows on the support cable anyhow. The tower sections usually make good enough contact (judging by the lack
To: <towertalk@contesting.com> Snip... I read the antenna book entry for this antenna. They do indeed specify a 4:1 balun for feeding this thing. And, it is indeed _not_ a T-match or floded dipole el
Hi Bob, Bill, Last October I drilled in a field of ground electrodes in preparation for the tower I'll be putting up this spring. I also drove in a few the "old fashioned way" just to have a comparis
To: <towertalk@contesting.com> You _can_ do that. But until the surface area of the ground wire and coax shield are larger than the surface area of the tower structure, the tower will still be carryi
Michael, I have read the article in question and as near as I can tell he is correct in his ultimate conclusions. I'll try to answer your questions in less than 12 pages of tortuous math to support a
Hi Jeff, OK. Here is the procedure to find the additional line loss caused by operating a transmission line into a load which does not perfectly match the line impedance. I have spread it out within
Hi Ron, It seems to me that there is a LOT of confusion on this subject. To: <towertalk@contesting.com> You should not worry about stroke current heating an appropriately sized conductor (bigger than
To: <towertalk@contesting.com> Snip... It is blue (service removable). -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: tower