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<blockquote data-quote="JimJ" data-source="post: 1406669" data-attributes="member: 555251">OT technical alert...ignore if you wantShort grounding is nowhere near as important at DC as it is once you get to RF frequencies...I have a 4 inch lead grounding the antenna tuner to the chassis, and on the lower frequencies (80 meters and below), it still isn&#039;t enough to get a decent SWR. When I get around to it, I&#039;m going to be upgrading everything to 2/0 cable to both the ground and the radiating element - even though it&#039;s such a short connection, the fact that the antenna element itself is so short relative to the wavelength (9 feet vs. 262 feet for the 3.5mHz band) the voltage, and therefore the losses, are huge. On 10/11 meters it it&#039;s so bad because the tuner doesn&#039;t have to work hard to get a 50 ohm load, but when there&#039;s tons of radiation resistance, those things can hurt you dead if you happen to be in the way //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</blockquote>

[QUOTE="JimJ, post: 1406669, member: 555251"] [COLOR=red]OT technical alert...ignore if you want[/COLOR] Short grounding is nowhere near as important at DC as it is once you get to RF frequencies...I have a 4 inch lead grounding the antenna tuner to the chassis, and on the lower frequencies (80 meters and below), it still isn't enough to get a decent SWR. When I get around to it, I'm going to be upgrading everything to 2/0 cable to both the ground and the radiating element - even though it's such a short connection, the fact that the antenna element itself is so short relative to the wavelength (9 feet vs. 262 feet for the 3.5mHz band) the voltage, and therefore the losses, are [B]huge[/B]. On 10/11 meters it it's so bad because the tuner doesn't have to work hard to get a 50 ohm load, but when there's tons of radiation resistance, those things can hurt you dead if you happen to be in the way [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] [/QUOTE]

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