Resistance measurements of the ground is fine for powerline frequencies but not very good for lightning. You need to measure the impedance of the ground system at frequencies up into the megahertz ra
I ran afoul of this way back in grammar school when we were taught that the average lifespan of the colonists was about 40 years. I went through most of my life thinking that these folks reached midd
As far as I can remember, RG-8X has always had a stranded center conductor. As for connectors, I always used a standard PL-259 with the threaded reducer for RG-59. I've never seen a crimp for RG-8X.
I measured my XM-240 coils with a TS-617 Q meter and Q of about 160. It's quite difficult to get a decent connection from the Q meter to the coil. Any R in the connections is seen as lower Q. 73, Rog
This type of meter is designed to measure the resistance of grounds at power line frequencies. Unfortunately, lightning is an RF phenomenon with energy up into the Mhz range. At these frequencies, th
Do you propose that it is not necessary to achieve the recommended 5 to 10 ohms of resistance in a tower ground system? Recommended by who and for what purpose? What is your measurement technique to
NO! It can follow many paths. The current dividing according to the impedance of each path. 73, Roger NO -- it follows the path of least IMPEDANCE, which is the path of least INDUCTANCE, which is the
I recommend direct bury rated cable. This has a polyethylene (PE) jacket which is more "waterproof" and "tougher" than PVC. I don't know if the foam dielectric is open or closed cell foam. With close
Real coax is seldom exactly 50 Ohms Real coax has a small amount of reactance Real coax has loss If you don't do a SOL calibration at the antenna end you're just guessing! 73, Roger On 6/1/16 1:20 PM
I'm faced with the problem of shipping an XM-240. I don't have the original boxes. I live out in the boondocks and containers are not readily available. Suggestions welcome. 73, Roger _______________
The sprinkler cable I bought a while ago was copper coated steel. Quite a bit more restive than pure Cu. 73, Roger On 6/25/2016 2:25 PM, Jeff DePolo wrote: Why not use sprinkler system control cable?
Does anyone have a Slipp-Nott laying around that they want to sell? 73, Roger _______________________________________________ _______________________________________________ TowerTalk mailing list To
I was about to jump on you and disagree. However, I found this on the Times Cable site: CABLE DESIGNATIONS Cables that are manufactured to MIL-C-17 specifications no longer carry the RG designation.
The big question is, over what frequency range and angles does this F?B ratio hold up? 73, Roger On 9/1/2016 8:09 AM, Rudy Bakalov via TowerTalk wrote: It is worth taking a look at the Swiss quad des
http://www.loran-history.info/downloads/bulletin_servicebeyond_oct_10_2010.pdf Those were the "Good Ole Days" 73, Roger CWO4, USCG (ret) _______________________________________________ ______________
Have you thought of the commonly available "split bolt" type of connectors? 73, Roger There seem to be some other varieties of these clamps, but individually the are expensive. Any USA sources or oth
Check out: http://k6tu.net/?q=TerrainProfiles 73, Roger Has anyone done this recently (ie, current MicroDEM version) who can give me an example of a download URL that works for any US location as an
Does anyone have a good solution to the cast aluminum mast clamps used on the G-1000 rotor. 73, Roger _______________________________________________ _______________________________________________ T
Yours maybe...mine not so well. The cast clamps will break if you try to tighten them securely. Yaesu finally put holes in the clamps for a through bolt but I don't want to do that. The constant move