So I will say it AGAIN. What I want to do is measure the ground resistance of a multi ground rod system in VERY POOR soils in my case. WHY I want to know this number or what I intend to use it for IS
One of my heroes of the late 20th century was Ed Demming a noted statistician ( with a degree in EE of all things) who changed the way the world (most notably the US and Japan in the 70's and 80's) l
Redwing, and similar work boots, have boots designed for the forest service that have the notch (so your foot doesn't slip off the rung, or the stirrup, should you be on horseback). Hie thee to a wor
On 10/1/21 8:58 AM, k7lxc-- via TowerTalk wrote: Howdy, TowerTalkians - I have a customer that just ordered a Heights crank-up. They quoted him 12 months delivery. They can't get the aluminum. P
Diameter grows at the same rate. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contestin
If it was me I'd stick it in the oven and see what happens. If that didn't seize it up, then I'd put it in the freezer and repeat the experiment. 73 - Mark N5OT who thinks the best conductors are th
The question is if it is bad form to put more than one cable into the grip. I understand that the braid will not fully contact any one cable. The only reason to consider mor than one per grip is that
5) As to buried coax, the skin depth of soil can be pretty great. I've seen estimates from W8JI on the order of 60 ft at 2 MHz, probably a bit less at higher frequencies, and highly variable with soi
I used to use a lot of hose clamps for this kind of thing. I don't any more, unless there's some specific requirement for it. 1) you need cushioning - the band has sharp edges 2) those stupid edges p
Yes, I understand about the lack of shields on most rotator cables. That is in part what prompted my question. It seems like the rotator cable is "the elephant in the room" when it comes to grounding
73... Randy, W8FN SP7GXP is quoting dBd - but does not say "free space" or "ground reflection" Frequency: 28, 21, 14 MHz Number of elements per band: 28 MHz 8 ele. 21 MHz 4 ele. 14 MHz 4 ele. Gain [d
When we had standards, it was 52. Once standard became "nominal", it was rounded down in print to cover sloppiness/ease in manufacturing. I don't know that 52 ohms was ever a "standard" - Just today
Yes, you could power your measurement system with a perpetual motion machine as well. The Hairy Ball Theorem says that building an isotropic antenna is impossible. (https://en.wikipedia.org/wiki/Hair
I want to model Rohn 25G as a transmitting antenna. Has anyone learned how to do that fairly accurately in K6STI's AO program? In addition to some length of regular straight sections, my tower has a
I was hoping someone had done this the easy way - Dave says "8.5 inches should work" and I'm getting predictable and usable results at the moment using 10 inches. Mostly I'm trying to get a reality
You might check out 4nec2. And I think AC6LA Dan McGuire's MultiNec does too. John KK9A I've never seen AO, but in EZNEC it's pretty easy. 73, Jim K9YC _______________________________________________
On 10/23/21 7:38 PM, Dan Maguire wrote: Jim Brown wrote: I've seen a simple equation for modeling a straight triangular tower in NEC. As I recall, the diameter worked out to be around 0.65 the width
Kim N5OP AC6LA's tools work with NEC, I think. 4nec2 is good and runs the nec engines underneath. There's also MMANA and some other programs out there. _______________________________________________
On 10/26/21 7:21 AM, Richard (Rick) Karlquist wrote: I still have an original official CD of Visio 2000, for example. It installs and runs perfectly under Windows 10. So you may be pleasantly surpri
SWR measurements seem normal around 2:1 at the end of the 1/4 wave 75 ohm lines except one which is 1.87. Havent made loss measurements yet but I suspect the lowest SWR line is the problem (low readi