On Oct 13, 2005, at 12:16 PM, Carcia, Francis A HS wrote:
> You want to bond that ground back to the breaker panel to prevent
> offset
> voltages during a lightning strike.
IF LIGHTNING WAS DC, THIS WOULD BE TRUE, HOWEVER, IT'S CLOSER TO 100KHz
RF.
> Don't rely on the neutral balk to the
> panel. Run another lead. My building inspector wants me to use #4
> single
> conductor. Home Depot sells it by the foot. fc
>
> -----Original Message-----
> From: Paul [mailto:condor@mags.net]
> Sent: Thursday, October 13, 2005 2:56 PM
> To: montytaylor@texoma.net; amps@contesting.com; TexasRF@aol.com;
> wa6fgi@sbcglobal.net
> Subject: Re: [Amps] Dedicated 220AC Wiring for Amps..
>
> monty taylor wrote:
>
> This brings up a question I have. I am using my pre-wired dryer
> outlet,
> 30 amp breaker, #10 wire; red, black and white. It has only three
> conductors and no ground wire, just; hot, hot, and neutral. The house
> is 10 years old and code approved. For the amp, an AL1500, I wired per
> the instruction manual for 220 Volts, hot, hot and neutral to the
> ground/chassis connection. Now, I want to RF/AC ground the chassis to
> a
> different 8ft copper clad ground rod. I read that you should never
> connect neutral and ground together at any place other than the entry
> panel as a difference in voltage potential could exist. The #10 run
> to
> the dryer outlet is about 30 feet. My question: Should I ground the
> amp
> to the new rod outside my shack or not? I have been using the shack
> with out any ground rods so far; only at the far end of all my coax
> runs
> through lightning surge protectors.
>
> A little wordy, but I hope I get some answers.
>
> Best regards,
> Monty/WB5GLB since 1969
>
> =======================================================================
> ====
>
> Yes...
>
> The RF ground serves a different purpose than the power ground.
>
> I run an Alpha 77SX, and have the same power arrangement
> 240/neutral/240
> The neutral is grounded at the power box so I get -
>
> O <->240<-> O
> \ /
> 120 120
> \ /
> O
>
>
> My amp and all of the other equipment are also RF grounded with a 10
> foot copper
> pipe that is driven straight down into the dirt outside the window of
> the shack,
> plus some wire from the pipe that runs a few inches under the dirt for
> about 40 feet.
>
> Works just fine.
>
> The ground rod in the tomato garden is to get rid of RF on the
> equipment
> - it acts
> like an RF conduit to the "resistive sponge of dirt" and keeps mics,
> keys. tuners,
> and chassis from being "hot", and keeps garbage from one transceiver
> from getting
> into the receiver of another.
>
> Paul - K2BK
>
>
>
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Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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