1) I think you'll find that all unibody constructed cars have serious anti-corrosion coatings applied, after welding. Bolted-on components are almost never electrically connected, unless there is a r
itself is usually floating within the housing. That's not necessarily a bad thing -- IF there are two wires connecting the mic element to the transceiver, one going to the "so-called audio ground," a
Hi Jim, Here's another one to add to your list: Discard all forms of "braided" cable. Braid is something a girl does to her hair. It is not a good RF ground and it's a terrible conductor for lightnin
Here's a clarification, pointed out by an attentive towertalkian: My previous e-mail was not intended to refer to cables that use a braided shield under a jacket. A tight jacket compresses the braid
Fascinating, Frank. I tried going back up the URL tree, and eventually found myself at a page for Presbyterian gun owners! However, beginning at least with /ground2.htm there's a lot of good stuff th
from I'll speculate.. Aluminum is a fine conductor, and cheaper (for a given current carrying capacity) than copper. The notorious problems with aluminum wiring in houses are more to do with installa
I wouldn't put too much credence in the site that you reference. That guy spouts out a lot of mis-information about lightning protection. Most of the references are ok but some are suspect. I have ha
But note that special fittings are required for connecting aluminum conductors to copper ones to avoid corrosion resulting from electrolytic action. Alan NV8A On 01/16/05 01:04 pm Jim Lux tossed the
This gets back to "proper installation". Aluminum cables are used outdoors in all sorts of applications without problems, over very long time spans (think HV electrical transmission lines...) with v
You bet... and I'll bet there's a bunch of specialized aluminum cable fittings for lightning protection systems, along with conductive glop and protective glop, special crimp ferrules, a nifty $200 F
of any utility above 2 MHz. OK. So where is the proof? I am thinking any writing you can find is based on the use of braid that of poor manufacture or has corroded, or both. Poor or corroded braid c
In my former existence as a Rocket Engineer, I worked on a 1000 acre plant site that had many buildings all with lightning protection per MIL spec (Ordnance corp) In 38 years, the only lightning dama
Keith, Braid acts exactly as you suggest only when the many small diameter conductors are under sufficient pressure to cause the RF currents to flow on the surface of the braid. This is the case with
Frank, I understand your beliefs, and your explanation sounds reasonable, other than the pressure of the jacket on braid part. The pressure would only be needed if the braid were loosely formed aroun
station ground other publications Harger. I found by using braided Sometimes we can't easily find things that are commonly known or understood in engineering circles. Most engineers and many hobbyis
Tom Rauch wrote: In HF power amplifiers, I have found a good general rule of thumb is this: At 30 MHz is the clean braid from RG-8 cable has about the same current carrying capacity as #14 or 16 tinn
Author: "K8RI on Tower Talk" <k8ri-tower@charter.net>
Date: Sun, 16 Jan 2005 23:38:15 -0500
In HF power amplifiers, I have found a good general rule of thumb is this: At 30 MHz is the clean braid from RG-8 cable has about the same current carrying capacity as #14 or 16 tinned solid buss wir
Now this is the most plausible explanation seen so far. Basically it seems that there is no valid reason to have measured evidence if one follows sound engineering practice. Makes perfect sense to me
Pete, Try http://members.cox.net/pc-usa/station/ground0.htm 73, Jim Smith VE7FO Pete Smith wrote: Fascinating, Frank. I tried going back up the URL tree, and eventually found myself at a page for Pre
<snip> In HF power amplifiers, I have found a good general rule of thumb is this: At 30 MHz is the clean braid from RG-8 cable has about the same current carrying capacity as #14 or 16 tinned solid b