Are you saying that the electric company ground with the short rod at the
box and the first pole, who knows how far away, is better than several
sunken 10' rods with very low impedance wire (Strap or braid) right at the
shack. Certainly for an RF ground that is not the case or even close.
Electrical ground, I'm not sure how big an argument I could put up, but it
seems that the lowest impedance ground will always be closer in provided it
is configured correctly. I would in every case want to be attached to the
electric ground, but I believe the proper system in close offers the best
protection.
Sam N9FUT
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Ron Youvan
Sent: Tuesday, April 05, 2011 9:20 AM
To: amps
Subject: Re: [Amps] 2 more questions-- electrical
Charles Harpole k4vud@hotmail.com wrote:
> 1. Is it possible for the shack ground via a couple of earth implanted
ground rods to be a "better" ground than that on the breaker box? (The one
with a 3 foot steel rod.)
No, that is not possible. The power company grounds IS thousands of
ground rods one under every other power pole all the way back to the
generating plant in parallel. AC impedance measurements here always go
off the scale in the direction of .000001 Ohm. (W.C. Florida)
> 2. If you have a battery operated device which charges from the car 12
VDC and it is hot on the car battery all the time.... will the car battery
draw a drain from the device battery when the car is not running?
> Thank you all for very thoughtful replies to the 230VDC question. 73
Yes always, it is called "surface leakage" and it is usually between 2
and 3 Amperes for a full sized car battery, it generates heat in the
battery. (possibly less dependent on chemistry) This is what causes a
fully charged battery to self discharge.
--
Ron KA4INM - Endless Loop: n. see Loop, Endless.
Loop, Endless: n. see Endless Loop.
-- Random Shack Data Processing Dictionary
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