One caution, Red - John W0UN sent me an email letting me know that the portion of Leeson's book that describes the need to torque balance elements with dummy elements is incorrect. It seems that Dick
a Well in my case, I think we may be pushing the limits of the rotor and tower. Its a long story as to why, but the two KLM antennas in our stack (40M4 and KT34XA) have the 3" OD x 1/4 wall "ICE" boo
I am looking for a good source for RG-6 for an upcoming RX antenna project. I need quick turnaround (stocking supplier) and a good price (I need 1000 feet). My preference would be single shield (95%
Thanks to all who replied to my query about RG-6. I was able to find a suitable supplier and get an order placed. Next time I will start my search sooner so that I have time to chase the free stuff f
suspect off elevation A couple of comments. With regard to locating your towers, I suggest you checkout the program Radio Mobile: http://www.cplus.org/rmw/english1.html It allows you to overall 1 met
I got a long piece of 1" copper water pipe and put wooden dowel rod inside. Then I drilled holes all the way through the pipe every few inches for pipe from deforming too much when I tighten the scre
Gary, That might be true if each piece of equipment in the shack was totally isolated from every other piece of equipment. In reality there are all kinds of incidental chassis connection between gea
Okay, I'll bite, Tom. Why is it stupid to run the negative lead from my rig directly to the battery? I did this in my truck. Is the main concern failure of the main chassis to battery negative connec
How are most factory installed radio's and other accessories wired up? Do they use a dedicated return wire to the battery or are they all chassis returned. If anyone would have the insight and experi
I just remembered that there are these excerpts from factory 2-way radio installations guidlines for Ford, GM, and Crysler in the ARRL RFI Handbook. Here is a summary of what they recommend: FORD: "T
You'll also see braid used in ESD sensitive environments for ground along workbenches and such. Its flexible and easy to connect to with an alligator clip if you need to ground something or someone.
in the 70 to 80 foot high range. They include ponderosa and sugar pine, white pine and Douglas firs. Am considering a tower for a yagi or quad and as a support for wire antennas and am wondering how
Pete are you sure that is correct? I thought HFTA would do 149 terrain points at whatever spacing provided, the tradeoff being fine structure detail versus distance covered. Mike, W4EF..............
Jim, et al: I wonder if HFTA would have any problems with unevenly spaced points. If you have a mountain that is 15 miles away with a flat plain in between, you really want to conserve those 149 poin
How about coming up into mating connector from the bottom and then installing a rain hat over the mating connector so that the rain can't get to the connector interface (imagine the top end of a 2 li
use. the It just occurred to me that those orange traffic cones would work really well if you capped the tops of the cones so the water woudn't run through. They are weighted so they won't fall over
from corresponds Generally I think the carrier levels on analog coaxial trunks are set at something like +33dBmV/carrier (~-15dBm). You can't run the carriers much higher on the trunks or the cumulat
Hi Jose, Looks like 1020 DOM has a yield strength of around 60,000 ksi. That is going to be somewhere between 1/3 and 1/2 the strength of a good chrome moly alloy mast with the same cross section. Le
I would expect the shorter antenna to have a higher current maximum due to a lower radiation resistance. The longer antenna should have a lower current maximum, but the current will be distributed ov
If you want to be competitive on the low bands, Scott, the most important thing to consider is your ability to hear weak stations. Given the choice for example between a 300 ft tower in your current