I also notice that he asked about "Shack" ground. Anyone who has run QRO and
used only electrical grounds gets RF burns to the lips on a mic, to the
underside of the forearm on the corners of chairs and desks. Sometimes quite
embarrassing on a voice peak to burn the hell out of your self and create
another unwanted voice peak. The electric panel is not a suitable shack
"RF"ground and things get uglier the higher in power you go.
Sam
-----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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