In article . com,
"RHF" wrote:

Telamon,

Being Well Grounded is the Best Foundation for Every Radio Shack
http://groups.yahoo.com/group/Shortw...a/message/9152

The Third Wire in the AC Power Cord is by-design an "AC Power Return
Path" -not- and RF Signal Ground Path.

Snip

I know that but it still operates as an RF return. The impedance is
higher than what you would want for it to be a good ground and worse it
usually has plenty of noise on it so it should be your last choice.

If the mutual inductive coupling to the hot and return wires was not bad
enough the ground wire often carries noise currents capacitively coupled
from the insides of devices.

--
Telamon
Ventura, California

Telamon - Well written except two little words were missing.

I know that but it still operates as a 'poor' to 'marginal' RF return.
The impedance is higher than what you would want for it to be a
good ground and worse it usually has plenty of noise on it so it
should be your last choice.

This is the very reason 'if' at all possible a separate Ground Wire
should be used as the "Primary" RF Ground to the Radios and
other equipment in the Radio Shack.

Especially if you are going to be using an External Antenna
which requires a Good Ground like an Inverted "L" Antenna
with a 9:1 Matching Transformer and Coax Cable feed-in-line.


iane ~ RHF

On 22 Apr 2006 01:09:00 -0700, "RHF"
wrote:

Telamon - Well written except two little words were missing.

I know that but it still operates as a 'poor' to 'marginal' RF return.
The impedance is higher than what you would want for it to be a
good ground and worse it usually has plenty of noise on it so it
should be your last choice.

This is the very reason 'if' at all possible a separate Ground Wire
should be used as the "Primary" RF Ground to the Radios and
other equipment in the Radio Shack.

Especially if you are going to be using an External Antenna
which requires a Good Ground like an Inverted "L" Antenna
with a 9:1 Matching Transformer and Coax Cable feed-in-line.


iane ~ RHF
.
There is a ground on the cable. Adding a second ground (or 3rd if
there is a 3 wire power cord) can cause more noise. In most urban
environments the RF improvement to be realized from having a fancy
receiver ground is buried way down in the noise floor. You'd be
better served by talking your neighbors into getting rid of their $5
light dimmers.