Thanks Steve. I agree but didn't expect this problem. Should have known this
could be a problem since this is an older home that has been remodeled.
Regardless of the outcome with the power company I've been studying Jims
writings on grounding and bonding and finding things that don't look ri
I have and electrician coming next week who says he will check things out and
first of all ground the breaker panel to two ground rods 7 feet apart. I
thought the grounding was put at the meter but he says they don't do that
anymore. I think the old meter, before we had the new one put in had
Hi Jim (Murray)
Jim K9YC is absolutely right - I live in a similar situation to you and the
problems have been markedly improved by getting the grounding and bonding to
earth improved around the house - wish I had taken Jim's advice years ago.
House earths are often very simple at best and whi
The amount of MF radio garbage that is running around common mode on power
lines, phone lines, metallic pipes, etc, is pretty amazing. I've walked
around with my battery K2 listening next to power pole ground wires, buried
power lines where they enter the ground.
The garbage level goes down very q
I ran into a rather odd source of RFI, possibly common mode.
I had 2 transformer type Astron power supplies in the ham shack.
One was a 15 amp desktop type, the other a 35 amp rackmount unit.
My observation is that when both were on, a buzz was detectable on various
frequencies in the 160 band. If
On Wed,10/28/2015 8:34 AM, Guy Olinger K2AV wrote:
I've walked
around with my battery K2 listening next to power pole ground wires, buried
power lines where they enter the ground.
Yes, and those wires are transmitting antennas, so they radiate that
noise like any other antenna.
The earth is
I suggest that you grab an Ohmeter and check that the green wire on the
power cable is connected to the chassis. On all of the Astrons I've
checked, it was not -- it was soldered to the mounting lug of a terminal
strip, which was insulated from the chassis by paint. On one of the
units, the two
On Wed,10/28/2015 1:49 PM, Jim Murray via Topband wrote:
Thanks Steve. I agree but didn't expect this problem. Should have known this
could be a problem since this is an older home that has been remodeled.
Regardless of the outcome with the power company I've been studying Jims
writings on
Everything you do properly to reduce the chance of common mode noise being
conducted into the house will also reduce RF feedback, power line fault
damage, and lightning damage risks.
Even if it makes no difference in noise, it pays back in increased safety.
This house had expensive lightning p
I have and electrician coming next week who says he will check things out
and first of all ground the breaker panel to two ground rods 7 feet apart.
I thought the grounding was put at the meter but he says they don't do that
anymore. I think the old meter, before we had the new one put in had a
I'm in the process of setting up my station in a new QTH and plan to
install a station ground at the cable entrance.
Tom, is there a best practice for bonding to the mains ground? Any
approaches to avoid?
73,
Matt NQ6N
On Thu, Oct 29, 2015 at 7:07 AM, Tom W8JI wrote:
> I have and electrician c
I, for one, wonder how good my service entrance ground is...mine is probably 20
years old, and while the top looks ok, there's no way to know what's going on
down 4, 6 and 8 feet...my utlities are underground, if that means anything...
as a starting point, should a guy drive a new one? or 2 or 3,
15 10:28 AM
To: Matt Murphy ; Tom W8JI
Cc: Jim Murray ; low bad reflector
Subject: Re: Topband: RFI - and lots of it
I, for one, wonder how good my service entrance ground is...mine is probably 20
years old, and while the top looks ok, there's no way to know what's going on
down 4,
om] On Behalf Of Dan Edward
Dba East edwards
Sent: Thursday, October 29, 2015 10:28 AM
To: Matt Murphy ; Tom W8JI
Cc: Jim Murray ; low bad reflector
Subject: Re: Topband: RFI - and lots of it
I, for one, wonder how good my service entrance ground is...mine is probably 20
years old, and wh
I seem to recall that one of the arguments against soldering ground rod
attachments was that a lightning strike would first evaporate the solder
and then burn the connection. This would create a period during the strike
when it was not firmly connected and far more resistive. That in turn
elevates
Exactly right.
NQ6N asked about how to ground his new QTH. For about ten years, I
taught classes at trade shows on the topic of power and grounding for
audio and video contractors. Slides for those sessions are at
http://k9yc.com/InfoComm-PowerSystems2012.pdf
http://k9yc.com/InfoComm-Groundi
* ”I've not heard anyone talk about doing a proper clamp, and then protecting
the proper clamping by silver soldering over it all. The obvious disadvantage
is that changing out the connection becomes interesting, as in replacing the
ground rod.
Not sure how you reached that conclusion. I’m
I have driven copper ground rods in about ten years ago, then wrapped a
couple turns of #4 wire around the top and soldered that to the rod using
plumbers solder. These connections are as good today as the day I soldered
them. Plumbers solder works very well outdoors for me. I use it on
ever
all my plumbing is copper, hot and cold water, in the slab. and, i have an
outside water spigot just a few feet away from my service entrance...should I
tie it in too ??
just wondering, w5xz, dan
On Thursday, October 29, 2015 1:39 PM, Tom W8JI wrote:
>I have driven copper groun
On Thu,10/29/2015 2:45 PM, Dan Edward Dba East edwards wrote:
all my plumbing is copper, hot and cold water, in the slab. and, i have an
outside water spigot just a few feet away from my service entrance...should I
tie it in too ??
NEC REQUIRES that it be tied in.
73, Jim K9YC
_
It would really be something if in-the-slab copper was floating
electrically. I have seen the copper connected with a heavy wire out of the
slab connected to the ground bus in the main electrical panel. The other
end of the wire came up out of the slab next to the bonding point with the
copper pipe
ok...another thing i've wondered about...
every bathroom and utility sink plus the kitchen have 120 vac outlet quite
nearby..
should i tie the green a.c. wire to the plumbing at each?
w5xz
On Thursday, October 29, 2015 5:36 PM, Guy Olinger K2AV
wrote:
It would really be something
No, that should be done at a central point in each premises, and only
when the plumbing is metallic and conductive to the earth.
73, Jim
On Fri,10/30/2015 9:58 AM, Dan Edward Dba East edwards wrote:
ok...another thing i've wondered about...
every bathroom and utility sink plus the kitchen have
'central point' being my main service breaker box?
it's a good distance away from any plumbing...
On Friday, October 30, 2015 12:28 PM, Jim Brown
wrote:
No, that should be done at a central point in each premises, and only
when the plumbing is metallic and conductive to the earth.
Yes, or where other premises grounds are tied together. Systems like
Telco, CATV, satellite, even lightning rods if there are any, building
steel if there is any.
73, Jim
On Fri,10/30/2015 11:03 AM, Dan Edward Dba East edwards wrote:
'central point' being my main service breaker box?
it's a g
corrrect me if i am wrong (seems i get more wrong than i used to) the
"Central Point" is where the white neutral buss, the green ground buss
and the ground rod return all come togtether
mike w7dra
American Express Travel
Earn 2x Points
I assumed the "central point" Jim was referring to, was a central point for
the plumbing. For the electrical side, this is a no brainer, it has to be
the entrance panel.
I have observed in my neighborhood, that the plumbing is usually bonded to
ground just after the water meter. That seems like a
- Original Message -
From: Tim Shoppa
Cc: topband@contesting.com
Sent: Fri, 30 Oct 2015 18:47:57 - (UTC)
Subject: Re: Topband: RFI - and lots of it
I assumed the "central point" Jim was referring to, was a central point for
the plumbing. For the electrical side, this is a no brain
On Fri,10/30/2015 11:47 AM, Tim Shoppa wrote:
I assumed the "central point" Jim was referring to, was a central point for
the plumbing. For the electrical side, this is a no brainer, it has to be
the entrance panel.
Or to the combination of grounds that is bonded to the entry panel.
73, Jim K9
On Fri, Oct 30, 2015 at 2:47 PM, Tim Shoppa wrote:
> My county's codes also requires that there be some kind of jumper for
> ground outside the water heater between the cold in pipe and hot out pipe.
> I don't know if this is a safety requirement or they are trying to divert
> electrolysis to pro
At the risk of sounding redundant, be very careful when messing around with
the bonding/grounding of the electrical panel.
Over the years I have seen significant current on these circuits due to a
wiring fault at the pole or on the drop to the house.
Art NK8X
ᐧ
On Fri, Oct 30, 2015 at 3:22 PM, Gu
On 30/10/2015 19:22, Guy Olinger K2AV wrote:
> Electrical advice via a 160 meter ham radio reflector from individuals
> scattered all over the globe? Even individuals qualified in their
> particular location. What could possibly go wrong :>)
Exactly so!
Where I am, ALL the copper pipes in the
On 30/10/2015 19:49, Art Snapper wrote:
At the risk of sounding redundant, be very careful when messing around with
the bonding/grounding of the electrical panel.
Over the years I have seen significant current on these circuits due to a
wiring fault at the pole or on the drop to the house.
Ind
WOW, keith! that's plenty of 'excitement'..
thanks to all, for advice and recommendations. my house was built in '94, but
outside the city limits, where 'code' gets a little sloppythough still in
an HOA / CCR subdivision...there is PLENTY of man-made crud to listen to, and
I'd just lik
Yes, or where other premises grounds are tied together. Systems like
Telco, CATV, satellite, even lightning rods if there are any, building
steel if there is any.
It doesn't matter where in the world we live, electrons all follow the same
physical laws.
There are three things that should ap
Tom,
Way back in the '90s, when I served on the SAE automotive RF immunity and
emissions (EMI & EMR) committees, questions about why we have negative-lead
fuses in ham radio gear came up from time to time. (Many of us on the
committees were hams.) The reason we were given is that there was a
sce
Way back in the '90s, when I served on the SAE automotive RF immunity and
emissions (EMI & EMR) committees, questions about why we have
negative-lead
fuses in ham radio gear came up from time to time. (Many of us on the
committees were hams.) The reason we were given is that there was a
scenar
My Icom radios come with the power cord fused for both negative and
positive. From what you say, I should remove the negative fuse if I install
the radios in a vehicle. Now when the radios are at the fixed station the
same power cord is used (both lines fused), I understand that the negative
line
Thanks to all. Yes, eliminated everything in the home and noise continues
during the day. Evidently I've been lucky over the years. Prior to retirement
we counted 5 different homes around the country since I was licensed and this
is the first with rfi problems in the area. One location was a
On Sun,10/25/2015 8:59 PM, Jim Murray via Topband wrote:
Tomorrow I will walk the line and see if I can come up with anything.
Jim,
I STRONGLY suggest that you check out grounding and bonding in your home
before looking for noise sources. Poor or missing grounding and bonding
will bring nois
My Icom radios come with the power cord fused for both negative and
positive. From what you say, I should remove the negative fuse if I
install
the radios in a vehicle. Now when the radios are at the fixed station the
same power cord is used (both lines fused), I understand that the negative
l
Electricians worked today on the house grounding the entrance panel and
checking out all of the wiring. Now, everything is grounded to the panel.
They ran a line from the grounding directly to the ham room ground bus, checked
all the outlets for any reverse etc.. They talked about putting a se
On Tue,11/3/2015 7:06 PM, Jim Murray via Topband wrote:
Electricians worked today on the house grounding the entrance panel and
checking out all of the wiring. Now, everything is grounded to the panel.
They ran a line from the grounding directly to the ham room ground bus, checked
all the ou
- but regardless, many investigators
don't even start looking for anything else till those get tightened.
On Tue, 11/3/15, Jim Murray via Topband wrote:
Subject: Re: Topband: RFI - and lots of it - final status
To: "TopBand List"
Dat
Really! The low voltage, high current connections, whodathoughtit?
Lately, when my central AC kicks on, the lights dim. I was going to start
by measuring the voltage drop in the breaker panel, but perhaps the issue
is those outdoor split-bolt connectors. Thanks for sharing this.
73, Mike
www.w0bt
45 matches
Mail list logo
