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Old 12-15-2016, 06:20 PM   #11
N3LYT
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It takes about .7 second to go around the world when the bands are hot. I have heard it a few times not real often.
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Old 12-15-2016, 06:42 PM   #12
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Quite true Carl not all antennas require grounding but all require a return path. http://www.arrl.org/grounding #2 in the article is what I'm referring to as far as a station ground.
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Old 12-15-2016, 06:56 PM   #13
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Actually about 1/8 to 1/7 of a second. It's 24,000 miles around the planet at a little more than 186,000 miles per second.

There have been QST articles about "long-delayed echoes", as I think they are called.

There's even a Wikipedia article about them.
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Old 12-16-2016, 01:18 AM   #14
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Quote:
Originally Posted by N3LYT View Post
Quite true Carl not all antennas require grounding but all require a return path. http://www.arrl.org/grounding #2 in the article is what I'm referring to as far as a station ground.
The article you point to is a little bit wrong, but you are right. Some antennas need a return, but in no case does that return need to be to the soil of the planet. The soil of the planet is a rather lossy return, usually, and almost any other kind of return "ground" is better.
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Old 12-16-2016, 08:33 AM   #15
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Quote:
Originally Posted by NN5I View Post
The article you point to is a little bit wrong, but you are right. Some antennas need a return, but in no case does that return need to be to the soil of the planet. The soil of the planet is a rather lossy return, usually, and almost any other kind of return "ground" is better.
I'm not disputing that, the ground is lossy but a good earth ground does help eliminate stray RF floating around your shack. A single point ground to me is well worth the effort.
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Old 12-16-2016, 10:13 AM   #16
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That is what it sounds like but far far too clear.. It has to be something in the RV, I've a rather extensive computer net.. Wi-Fi "modem" (Linksys WGA-54G) Router (belkin) something like 8 differnet devices some wired (4) some Wi-Fi. including Shack Computer (WI-Fi at the moment but there is a were in place, blanged adapter not adapting) This laptop (Wired but can use wifi) Switch, DVR 1, DVR-2 File Server (Windiows 7 comp)_ For DVR's Phone, tablet Chromecase and tablet.

However what comptuers are on/off or eve3n exist do not seem to affect it.. (The Chrome book for example is new this month and it's been happening for years,, The Tablet is new last year (As is the phone) Tablet is currently re-playing Ham nation via Chrome cast (Also new in 2014) but it's been happening longer than that.. And only sometimes.. Not always.. Today it was clear, but faint, I gave my call (3.973 MHz) Rich said HI, then I heard the echo.
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Old 12-17-2016, 06:29 PM   #17
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I give up on the "echo" that's a new one for me. Store and forward?
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