Re: DSP and CW

[tom.w3qs]

Hi Stuart,

I have heard this so many times I think it has become 'general knowledge',
but I don't get it.  Say you have two power strips plugged into the same
wall outlet.  Surely the ground leads of both are then physically connected
inside that wall outlet.  Aren't the ground leads of both then physically
connected?

For that matter, all grounding leads are ultimately connected to the same
physical terminal on the house's power panel.  Again, I know there is
'conventional wisdom' that talks of 'two' 120 loops in a 240 house, but
still the ground leads are all connected - at least they are at my house.

What am I missing?  

Tom

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On

Part of good grounding, is to run a computer used with a radio from the same

power strip.   IF the computer is NOT used with radio, have it separated or
on different power circuit.

Stuart
K5KVH




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[Doug Faunt N6TQS [phone]]

Hi Tom,
Each ground wire has different losses, and picks up different noise, so
in fact, while they are the same on a gross level, on a fine level,
they are different.  The closer together they're tied, the more
they'll be the same.  If the intent is to minimize differences, get
them very close together.  If the intent is to isolate noise from the
other, the further away the interconnection point is, the better.

We used to install isolated ground systems for HP computers back in
the old days, since they were very sensitive to noise coming in the
power line.


73, doug

   Date: Thu, 11 Aug 2005 08:01:00 -0400
   From: "tom.w3qs" <[hidden email]>
   Thread-index: AcWeDCu0x19GI2pERq+NLxNnUJYg5QAXmtUw

   Hi Stuart,

   I have heard this so many times I think it has become 'general knowledge',
   but I don't get it.  Say you have two power strips plugged into the same
   wall outlet.  Surely the ground leads of both are then physically connected
   inside that wall outlet.  Aren't the ground leads of both then physically
   connected?

   For that matter, all grounding leads are ultimately connected to the same
   physical terminal on the house's power panel.  Again, I know there is
   'conventional wisdom' that talks of 'two' 120 loops in a 240 house, but
   still the ground leads are all connected - at least they are at my house.

   What am I missing?  

   Tom

   -----Original Message-----
   From: [hidden email]
   [mailto:[hidden email]] On

   Part of good grounding, is to run a computer used with a radio from the same

   power strip.   IF the computer is NOT used with radio, have it separated or
   on different power circuit.

   Stuart
   K5KVH




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   Subscriber Info (Addr. Change, sub, unsub etc.):
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[Jim Price-3]

Paul,

I wonder what model/type of computer & monitor you are using?

Jim - N4ST

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Paul Gates
Sent: Wednesday, August 10, 2005 18:25
To: John [K7SVV]; elecraft
Subject: Re: [Elecraft] Interference from Computers-Routers


This is all interesting about the interference. I have my computer about 3
inches from my station and have never had any noise or interference from it.

I have the same router that you mention and not one peep of noise from it.
Am I just lucky?
Paul
Paul Gates
K1  #0231
KX1 #1186
XG1
[hidden email]


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