Bare wire up outdoors over ten years, just what I would term a patina on the outside. This is in contrast to what happens to bare copper used in a woven coax shield which has become waterlogged, wher
UV and weather degraded THHN wire was replaced with new bare wire and 60 ohms resistance disappeared that was visible only at RF. The wires were all pulled between posts, and the old wire was NOT sag
The question is not whether the laws of physics change, they don't. Always the question is whether or not WE understand what the laws of physics ACTUALLY are. Once upon a time you could get yourself
Believe this was during hurricane Isabel in 2003. The prevailing yak afterwards was that if he had cut the lines at the bottom and unpinned the rotator, let the tower and yagis "windvane", that he wo
The tower was 200' or in that neighborhood, and had a pair of phased 4 element 40m yagis, OWA's I think. It was big and a lot of wind load. 73, Guy K2AV ______________________________________________
Did a little more digging into hurricane Isabel. Gusts were measured in the Norfolk area up to 74 mph, which compared to other hurricanes may seem tame. At landfall, Isabel was a category 2, but was
Phased antennas with buried radials need to be done with bare wire. That allows the ground conductivity to participate in and improve the conduction. The soldered wire crossings "bus bar" removes int
Digging through various postings, it seems that the current F12, was also acting as a front for Inovative designs in the US. The latter now has something going with MFJ, which means all the web stuff
Digging through various postings, it seems that the current F12, was also acting as a front for Inovative designs in the US. The latter now has something going with MFJ, which means all the web stuff
The best way, if you have visible items in satellite maps on Google Earth, is to use the built-in distance and bearing facility. map length to "feet" click the cross-hair over spot 1, then click cros
Why are you not looking for FT240-31 cores? What uses are you making of them? Go read K9YC's web page. 73, Guy K2AV _______________________________________________ ___________________________________
Hi Bill, Phasing center cannot be assumed with dissimilar yagis. What is usually done, is to monkey with phasing lines until a null at low angles is obtained. Then remove 180 degrees. The difficulty
The best that I have seen is flat sheets of galvanized steel cut to fit across the rungs between the vertical metal and permanently attached up to a point requiring a ladder to get to a climbing poin
It's not the tools that are band-specific. The reflection formed vertical pattern is band specific. You are defeated in this by the laws of physics. Some partially solve this dilemma with stacks. Sta
See https://www.coleparmer.com/tech-article/uv-properties-of-plastics 73, Guy K2AV _______________________________________________ _______________________________________________ TowerTalk mailing li
Indeed. Over a decade ago, following some RadioWorks failures at W0UCE(SK), taking failed units apart, there actually was a very simple way of rebuilding burned/melted coax wound on ferrite rod devic
Indeed. But this is THE monkey wrench in the works for a lot of folks, possibly including the original poster on this thread. On the lower bands, a lot of "all band" chokes have very little blocking.
On 160 and to a lesser extent 80 RX antennas prove out better than TX antennas for listening. Set your TX antenna for some compromise of gain, bandwidth and azimuth coverage. As most RX solutions wor
I have a much smaller non-powered version of this instrument, the MFJ-853, that cost about half the price of the 854. The 853 works 300 ma, 1 amp and 3 amps. It has been quite adequate for seeing in
Having disassembled a couple of the Carolina Windom devices that W0UCE burned up running 1500W CW to them, I can attest to their weakness. The windings were RG8X wound on what appeared to be adequate