"Tian_Li" wrote

(good references for quiet equipment, thanks), and:

Use a dedicated ground power outlet for your computer.

Unless you have a 1-radio "station" and no lightning protection of any kind,
this is a very bad choice.

It is also an expensive undertaking, requiring both a dedicated power
circuit *and* independent grounding. It's a favorite gimmick of audiophiles
but with limited results unless you have noise problems that can't be
corrected by repair or replacement of the offending emitters. While the
audiophile can experiment like that to his heart's content, communication
systems should *never* use independent grounds. That means everything in the
shack. All of our grounding *must* be bonded, and that means either fixing
or avoiding the use of noise emitters in the first place. For the computer,
keep interconnecting data cables away from the coax feedlines, and place RF
chokes on all power and data cables at both ends. That handles signal noise.
The computer's casing provides all the shielding that device should ever
need.

Jack

Use a dedicated ground power outlet for your computer.

Unless you have a 1-radio "station" and no lightning protection of any
kind,
this is a very bad choice.

The dedicated power outlet for the COMPUTER is wired by the electrician so
that
both ground leads (white and green) are wired directly to the breaker panel.
The power and ground is NOT
looped to other outlets. It is a dedicated power (and ground) outlet for
computer use only.
It is typically an orange colored power outlet.

This was not intended for radio use. It is simply suggested to keep radio
equipment powered
on a separate power circuit from the computer with the computer ground going
directly to the breaker panel ground.
That IS the single point ground for the house power wiring - at the breaker
panel.

"Tian_Li" wrote

Use a dedicated ground power outlet for your computer.

Unless you have a 1-radio "station" and no lightning protection of any
kind,
this is a very bad choice.

The dedicated power outlet for the COMPUTER is wired by the electrician so
that
both ground leads (white and green) are wired directly to the breaker
panel.
The power and ground is NOT
looped to other outlets. It is a dedicated power (and ground) outlet for
computer use only.
It is typically an orange colored power outlet.

This was not intended for radio use. It is simply suggested to keep radio
equipment powered
on a separate power circuit from the computer with the computer ground
going
directly to the breaker panel ground.
That IS the single point ground for the house power wiring - at the
breaker
panel.

Our discussion here is about radio, and that is not a helpful or cost
effective modification to make. Neither does it provide separate power to
the computer as you allege, it is merely a dedicated neutral and ground
connection to the mains. If electrical planning or mods are being done, much
better to provide the radio room with its own branch panel. Having a
computer on the radio circuit is not a problem, having the whole house on
the radio power loop can be.

Your description of single point ground for the home wiring is correct, but
not complete. The radio station has its own single point ground, and all AC
equipment in a radio room must bond to that. Equipment bonding in the radio
room would immediately negate the questionable benefit that a dedicated
computer neutral/ground offered. One grounding electrode conductor from the
station single point ground to the AC mains single point ground is required.
This creates an unavoidable loop, which is why truly separate power to the
radio room is desired, not a useless dedicated ground for a single piece of
equipment. The one noisy dimmer switch I have in my dining room, no longer
affects the radios since providing separate power to them.

Jack

= = = "Jack Painter" wrote in message
= = = news:eArjd.9201$ep3.8547@lakeread02...
"Tian_Li" wrote

Use a dedicated ground power outlet for your computer.

Unless you have a 1-radio "station" and no lightning protection of any
kind,
this is a very bad choice.

The dedicated power outlet for the COMPUTER is wired by the electrician so
that
both ground leads (white and green) are wired directly to the breaker
panel.
The power and ground is NOT
looped to other outlets. It is a dedicated power (and ground) outlet for
computer use only.
It is typically an orange colored power outlet.

This was not intended for radio use. It is simply suggested to keep radio
equipment powered
on a separate power circuit from the computer with the computer ground
going
directly to the breaker panel ground.
That IS the single point ground for the house power wiring - at the
breaker
panel.

Our discussion here is about radio, and that is not a helpful or cost
effective modification to make. Neither does it provide separate power to
the computer as you allege, it is merely a dedicated neutral and ground
connection to the mains. If electrical planning or mods are being done, much
better to provide the radio room with its own branch panel. Having a
computer on the radio circuit is not a problem, having the whole house on
the radio power loop can be.

Your description of single point ground for the home wiring is correct, but
not complete. The radio station has its own single point ground, and all AC
equipment in a radio room must bond to that. Equipment bonding in the radio
room would immediately negate the questionable benefit that a dedicated
computer neutral/ground offered. One grounding electrode conductor from the
station single point ground to the AC mains single point ground is required.
This creates an unavoidable loop, which is why truly separate power to the
radio room is desired, not a useless dedicated ground for a single piece of
equipment. The one noisy dimmer switch I have in my dining room, no longer
affects the radios since providing separate power to them.

Jack


TL & JP,

I you're going to have an Electrician (or a DIY Job) do all this
work of putting in a 'separate' Circuit for either the Computer
Equipment or the Shack Equipment.
- Have him (you) install a a Double Outlet Metal Box with two
sets of Two Outlet Connectors.
- Plug individual devises into the individual outlets and
do not daisy-chain the electrical connections.
- Use individual Clamp-On Ferrite Cores on each Electrical
Power Cord 'near' the Devise-End of the Power Cord.

TIP: Use enough Electrical Wire so he (you) can Install an
Individual Ferrite Core on each of the Three Electrical Service
Wires. Use a Toroidal and wrap 3-4 Turns looped through it.
- The same can be done on the ends of the Wires that are inside
of the Main Electrical Service Panel-Box.
- The object is to keep any and all the household electrical
wiring from becoming Noise RFI/EMF Radiators (Antennas).
- The same can be done with Dimmer Switches.

TIP: Have the Power Company 'do' an Inspection of the Electrical
Service Entry to House.
- Have them Verify that you have a Eight Foot or longer Ground
Rod as your Primary Grounding Point for your household Electrical
System.
- If you do not have one; then have one Installed and properly
connected to you Electrical System as your Service Entry Primary
Grounding Point.
- If you 'feel' that you need an extra/additional Ground for
your "Shack". Then have one installed with a "OO" Copper Wire
if less-than 20 Feet and "OOO" Wire Copper Wire if more-than 25
Feet distance between it and the Service Entry Ground to
'Bond-them-Together'.
WIRE-SIZE= http://www.powerstream.com/Wire_Size.htm

iane ~ RHF
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