Re: [Elecraft] [OT] A Very Quiet Day

2020-09-11 Thread Fred Jensen
I grew up in So Central Los Angeles, 1/2 block from one of the original 
2-circuit 230 KV transmission lines from Hoover Dam.  Several times a 
year, LA DWP came around with a tank truck and coupled it to a pipe 
running up the tower.  A guy climbed a ladder inside the tower, hooked 
up a nozzle at each of the three phases, and blew a water/air mixture at 
the insulators. then they moved on to the next tower.  My noise level 
always declined about an S-unit after the bath.


Often though, the problems aren't the insulators themselves but loose 
hardware on the pole that create micro-arcing.  Rain sometimes makes 
that noise worse, and wind really can.


73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 9/11/2020 10:00 AM, Phil Kane wrote:

On 9/10/2020 4:19 PM, David Gilbert wrote:


Malaysia gets a lot of rain, things are wet much of the time, and back
then (at least 30 years ago) many of the electrical insulators on the
overhead power lines were dirty with pollution.  I could see constant
arcing across dozens of insulators.

Yet one of the "cures" of QRM from electrical lines is to wash the
insulators.  Many large utilities have a specialized vehicle for that.
We have buried utilities here so there's no insulators to wash

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402



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Re: [Elecraft] [OT] A Very Quiet Day

2020-09-11 Thread Phil Kane
On 9/10/2020 4:19 PM, David Gilbert wrote:

> Malaysia gets a lot of rain, things are wet much of the time, and back
> then (at least 30 years ago) many of the electrical insulators on the
> overhead power lines were dirty with pollution.  I could see constant
> arcing across dozens of insulators.

Yet one of the "cures" of QRM from electrical lines is to wash the
insulators.  Many large utilities have a specialized vehicle for that.
We have buried utilities here so there's no insulators to wash

73 de K2ASP - Phil Kane
Elecraft K2/100   s/n 5402

From a Clearing in the Silicon Forest
Beaverton (Washington County) Oregon
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Re: [Elecraft] [OT] A Very Quiet Day

2020-09-11 Thread Edward R Cole
Here in Alaska, we have frequent power outages.  More often in winter 
due to wind storms knocking down wires.


A few years ago we bought a 6500w Honda inverter generator to provide 
emergency power.  Its large enough to supply the entire house 
load.  One of the interesting things was noting the drop in radio 
noise when power is off.  We see no lights in the neighborhood other 
than ours so any noise would be made in our house.  2m noise drop 
almost to S0.  Normal quiet times with commercial power runs 
S3.  Only see S2 or less on 2m when running our generator.  At times 
local noise on 2m rises to S7 which renders the band unusable except 
strong local signals.


I just set up my 6m eme system and measured S6/7 noise with the ARR 
preamp.  PR6 shows S3/4. ARR gain is 25-dB vs about 15-dB for the 
PR6, so I added a 10-dB attenuator in-line with the ARR preamp which 
now matches the PR6 noise floor pretty well.  ARR is closer to the 
antenna with 0.5 dB NF whereas the PR6 is about 0.7 dB NF.  Not 
really noticeable with local signals but makes a little improvement 
with weak eme signals.


When I first came to AK, I lived off the grid (about 2-3 miles from 
nearest power lines (town of pop 75).  80m band was S0 on my dipole 
at night.  Really heard well back then.  I now live 100 miles west of 
there in a buried utility area (2 to 5 acre parcels) which probably 
helps (though overhead lines are only 1/2 mile away.  HF is typically 
S5 noise with my K3 (preamp off).  I use the PR6 on 10m & 6m so that 
raises the noise floor a bit.  Our pop is 4,000 spread over 76 square 
miles with a city of 15,000 12 miles south.


Going to bush towns is no insurance for low noise.  I worked in a 
town 400 miles west of Anchorage (pop 3500) and tried setting up a 
long yagi on 2m on roof above the TV station.  Noise was over S9 (due 
to arc igniters in their furnace).  2m was totally unusable (trying 
for a long shot to Anchorage).  They ran a monitor on the AM radio 
station which blared horrible noise when they shut down the 
transmitter at night.


73, Ed - KL7UW
  http://www.kl7uw.com
Dubus-NA Business mail:
  dubus...@gmail.com 


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Re: [Elecraft] [OT] A Very Quiet Day

2020-09-11 Thread Henk de Vries
It has also to do with Intetnet being provided by all kinds of poorly shielded 
wiring hanging above ground.
In V31 I always operated with a battery from a remote beach location due to 
continous  9+++ noise in/near my appartment block and other urban areas.73 
HenkPA0C V31HV
 Oorspronkelijk bericht Van: James Bennett via Elecraft 
 Datum: 10-09-2020  23:29  (GMT+01:00) Aan: Elecraft 
Reflector Reflector  Onderwerp: Re: [Elecraft] [OT] A 
Very Quiet Day I can well understand that experience.Back in 2000 my new XYL 
and I honeymooned in St. Maarten / PJ7. I took a K2 with me and a length of 
wire and coax. I managed 40 - 50 CW QSO’s in between other activities. After we 
got back home I wrote an article that ARRL published in one of their online 
journals. At one time there was a link to it on the Elecraft site.Anyway, one 
of the things I warned prospective vacationers going to non-US sites was to be 
prepared for some horrendous QRN. As I mentioned in the article, many foreign 
countries have no laws governing RF interference. You’ll run into all sorts of 
crud on the power mains, not to mention some really ugly HF band obliterators 
in the form of cars and trucks. I suspect some places are better than others. 
In St. Maarten, every time any truck went down the street by our condo I had to 
take off the headphones for a while - it was bad, with a capital B!Jim / W6JHB> 
On Sep 10, 2020, at 2:17 PM, Tony Estep  wrote:> > On Thu, 
Sep 10, 2020 at 2:53 PM Al Lorona  wrote:> >> Power was 
shut off to my noisy urban neighborhood...radio was amazing>> yesterday for six 
glorious hours.>> > ==> Well, here's the flip side. My old 
qth was noisy enough, but the real> eye-opener came when I toted my KX3 to 
Hyderabad, India a few years ago. I> was teaching at the Indian School of 
Business and living in the faculty> apartments, and I had brought the KX3 along 
expecting to hear a bunch of> call-signs that would sound exotic to a 
midwestern Yank. So I strung up a> wire around the walls of my living room, up 
near the ceiling, and laid a> counterpoise out along the floor. Donning my 
headphones I switched it on,> looking forward to an evening of entertainment as 
I tuned 20 CW.> Zowie! What a cacophony of squeals, buzzes, crashes, honks and 
toots,> burps, whistles and grinds. The S-meter jumped up to about S9+10 and 
stuck> there. Nowhere on the band, it seemed, was there a slot wide enough for 
a> signal to peep through. Finally I was able to discern a little peep> 
half-buried beneath the layers of trash, a lonely VU2 calling CQ. I> answered 
him, but of course to no avail. On a later night I heard a few> words from a 
QSO between a local ham and a VR2 in Hong Kong, and that was> the sum total of 
my ham experience while there. Where were the noises> coming from? I dunno -- 
from everywhere, it sounded like.> > 73,> Tony KT0NY> 
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Re: [Elecraft] [OT] A Very Quiet Day

2020-09-10 Thread Dave Cole
We are getting ready to move...  One of the processes I intend on 
performing on any new site is described at:


https://www.nk7z.net/sdr-rfi-survey-p1/

using an SDR as a site survey tool...  I will have a quiet location...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 9/10/20 4:19 PM, David Gilbert wrote:


I used to travel to Malaysia quite often on business, and one of the 
guys who worked for me there as an ex-pat in Kuala Lumpur had gotten a 
9M2 license.  So I went over to his apartment one evening with the 
intention of working some 40m CW as a guest op, but the background noise 
was a horrendous scratchy buzz that ran at least S9+30.  When I went 
outside to look around I could see why.  Malaysia gets a lot of rain, 
things are wet much of the time, and back then (at least 30 years ago) 
many of the electrical insulators on the overhead power lines were dirty 
with pollution.  I could see constant arcing across dozens of insulators.


I'm retired now and live on a reasonably quiet semi-rural hillside, and 
!sometimes! on a quiet evening my QRN level on 160m is down below S2 
even on my Inverted-L.  Counting my blessings ...


73
Dave   AB7E




On 9/10/2020 2:17 PM, Tony Estep wrote:


==
Well, here's the flip side. My old qth was noisy enough, but the real
eye-opener came when I toted my KX3 to Hyderabad, India a few years 
ago. I

was teaching at the Indian School of Business and living in the faculty
apartments, and I had brought the KX3 along expecting to hear a bunch of
call-signs that would sound exotic to a midwestern Yank. So I strung up a
wire around the walls of my living room, up near the ceiling, and laid a
counterpoise out along the floor. Donning my headphones I switched it on,
looking forward to an evening of entertainment as I tuned 20 CW.
Zowie! What a cacophony of squeals, buzzes, crashes, honks and toots,
burps, whistles and grinds. The S-meter jumped up to about S9+10 and 
stuck

there. Nowhere on the band, it seemed, was there a slot wide enough for a
signal to peep through. Finally I was able to discern a little peep
half-buried beneath the layers of trash, a lonely VU2 calling CQ. I
answered him, but of course to no avail. On a later night I heard a few
words from a QSO between a local ham and a VR2 in Hong Kong, and that was
the sum total of my ham experience while there. Where were the noises
coming from? I dunno -- from everywhere, it sounded like.

73,
Tony KT0NY


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Re: [Elecraft] [OT] A Very Quiet Day

2020-09-10 Thread David Gilbert


I used to travel to Malaysia quite often on business, and one of the 
guys who worked for me there as an ex-pat in Kuala Lumpur had gotten a 
9M2 license.  So I went over to his apartment one evening with the 
intention of working some 40m CW as a guest op, but the background noise 
was a horrendous scratchy buzz that ran at least S9+30.  When I went 
outside to look around I could see why.  Malaysia gets a lot of rain, 
things are wet much of the time, and back then (at least 30 years ago) 
many of the electrical insulators on the overhead power lines were dirty 
with pollution.  I could see constant arcing across dozens of insulators.


I'm retired now and live on a reasonably quiet semi-rural hillside, and 
!sometimes! on a quiet evening my QRN level on 160m is down below S2 
even on my Inverted-L.  Counting my blessings ...


73
Dave   AB7E




On 9/10/2020 2:17 PM, Tony Estep wrote:


==
Well, here's the flip side. My old qth was noisy enough, but the real
eye-opener came when I toted my KX3 to Hyderabad, India a few years ago. I
was teaching at the Indian School of Business and living in the faculty
apartments, and I had brought the KX3 along expecting to hear a bunch of
call-signs that would sound exotic to a midwestern Yank. So I strung up a
wire around the walls of my living room, up near the ceiling, and laid a
counterpoise out along the floor. Donning my headphones I switched it on,
looking forward to an evening of entertainment as I tuned 20 CW.
Zowie! What a cacophony of squeals, buzzes, crashes, honks and toots,
burps, whistles and grinds. The S-meter jumped up to about S9+10 and stuck
there. Nowhere on the band, it seemed, was there a slot wide enough for a
signal to peep through. Finally I was able to discern a little peep
half-buried beneath the layers of trash, a lonely VU2 calling CQ. I
answered him, but of course to no avail. On a later night I heard a few
words from a QSO between a local ham and a VR2 in Hong Kong, and that was
the sum total of my ham experience while there. Where were the noises
coming from? I dunno -- from everywhere, it sounded like.

73,
Tony KT0NY


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Re: [Elecraft] [OT] A Very Quiet Day

2020-09-10 Thread James Bennett via Elecraft
I can well understand that experience.

Back in 2000 my new XYL and I honeymooned in St. Maarten / PJ7. I took a K2 
with me and a length of wire and coax. I managed 40 - 50 CW QSO’s in between 
other activities. After we got back home I wrote an article that ARRL published 
in one of their online journals. At one time there was a link to it on the 
Elecraft site.

Anyway, one of the things I warned prospective vacationers going to non-US 
sites was to be prepared for some horrendous QRN. As I mentioned in the 
article, many foreign countries have no laws governing RF interference. You’ll 
run into all sorts of crud on the power mains, not to mention some really ugly 
HF band obliterators in the form of cars and trucks. I suspect some places are 
better than others. In St. Maarten, every time any truck went down the street 
by our condo I had to take off the headphones for a while - it was bad, with a 
capital B!

Jim / W6JHB

> On Sep 10, 2020, at 2:17 PM, Tony Estep  wrote:
> 
> On Thu, Sep 10, 2020 at 2:53 PM Al Lorona  wrote:
> 
>> Power was shut off to my noisy urban neighborhood...radio was amazing
>> yesterday for six glorious hours.
>> 
> ==
> Well, here's the flip side. My old qth was noisy enough, but the real
> eye-opener came when I toted my KX3 to Hyderabad, India a few years ago. I
> was teaching at the Indian School of Business and living in the faculty
> apartments, and I had brought the KX3 along expecting to hear a bunch of
> call-signs that would sound exotic to a midwestern Yank. So I strung up a
> wire around the walls of my living room, up near the ceiling, and laid a
> counterpoise out along the floor. Donning my headphones I switched it on,
> looking forward to an evening of entertainment as I tuned 20 CW.
> Zowie! What a cacophony of squeals, buzzes, crashes, honks and toots,
> burps, whistles and grinds. The S-meter jumped up to about S9+10 and stuck
> there. Nowhere on the band, it seemed, was there a slot wide enough for a
> signal to peep through. Finally I was able to discern a little peep
> half-buried beneath the layers of trash, a lonely VU2 calling CQ. I
> answered him, but of course to no avail. On a later night I heard a few
> words from a QSO between a local ham and a VR2 in Hong Kong, and that was
> the sum total of my ham experience while there. Where were the noises
> coming from? I dunno -- from everywhere, it sounded like.
> 
> 73,
> Tony KT0NY
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Re: [Elecraft] [OT] A Very Quiet Day

2020-09-10 Thread Tony Estep
On Thu, Sep 10, 2020 at 2:53 PM Al Lorona  wrote:

> Power was shut off to my noisy urban neighborhood...radio was amazing
> yesterday for six glorious hours.
>
==
Well, here's the flip side. My old qth was noisy enough, but the real
eye-opener came when I toted my KX3 to Hyderabad, India a few years ago. I
was teaching at the Indian School of Business and living in the faculty
apartments, and I had brought the KX3 along expecting to hear a bunch of
call-signs that would sound exotic to a midwestern Yank. So I strung up a
wire around the walls of my living room, up near the ceiling, and laid a
counterpoise out along the floor. Donning my headphones I switched it on,
looking forward to an evening of entertainment as I tuned 20 CW.
Zowie! What a cacophony of squeals, buzzes, crashes, honks and toots,
burps, whistles and grinds. The S-meter jumped up to about S9+10 and stuck
there. Nowhere on the band, it seemed, was there a slot wide enough for a
signal to peep through. Finally I was able to discern a little peep
half-buried beneath the layers of trash, a lonely VU2 calling CQ. I
answered him, but of course to no avail. On a later night I heard a few
words from a QSO between a local ham and a VR2 in Hong Kong, and that was
the sum total of my ham experience while there. Where were the noises
coming from? I dunno -- from everywhere, it sounded like.

73,
Tony KT0NY
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Re: [Elecraft] [OT] A Very Quiet Day

2020-09-10 Thread Dave Cole
I have a 22 db noise floor change here when power fails...  If the pot 
grower has his lights on the noise floor drops almost 40 db during a 
power fail.


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 9/10/20 1:38 PM, Wayne Burdick wrote:

Hi Al,

Thanks for entertaining observations.

I have a proximately the same experience every time I take the KX2 or KX3 miles 
away from humanity.

Wayne
N6KR


elecraft.com


On Sep 10, 2020, at 12:53 PM, Al Lorona  wrote:

Power was shut off to my noisy urban neighborhood yesterday while crews 
replaced a power pole. For a long time, I have wanted to check my HF noise 
floor when the power is out, and yesterday was my chance.  For days like this 
is why my station is solar-powered!

I expected to be surprised but I was absolutely blown away by what I heard. The 
40 meter noise floor was at least *17 dB* lower than normal. I could hear 
layers and layers of signals that I never knew were there. Nets I never knew 
existed… I mean, have you heard of the Montana Sheepherders net, for pity’s 
sake? A midday 40 m pileup on a SOTA QRP CW station in Texas that I never would 
have had a prayer of hearing normally. The noise was so low that I could hear 
way, way down into the intermod of SSB signals—and most of them were quite 
yucky. I heard birdies and crud from washing machines from what must have been 
three blocks away. I heard the 7150 kHz 5th harmonic of a local AM station. By 
measurement on the P3, I confirmed that all of these signals would have been 
completely under my usual noise floor.

On 20, it was so quiet I almost believed that the K3’s receiver had failed. WWV 
was coming in at a 56 dB signal-to-noise ratio.

Interestingly, 80 meters was also quieter, but not by as much. I’m not 
complaining about nearly 10 dB less noise, but it’s too bad that power was 
turned on before dark, before I could really evaluate the conditions.

When it gets this quiet, there are no ticks, crashes or noise transients of any 
kind... just a gentle rushing sound, so it ‘feels’ even quieter than it is. It 
was every bit as quiet as a forest Field Day a hundred miles from civilization. 
Yes, radio was amazing yesterday for six glorious hours.

R,

Al  W6LX

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Re: [Elecraft] [OT] A Very Quiet Day

2020-09-10 Thread Wayne Burdick
Hi Al,

Thanks for entertaining observations.

I have a proximately the same experience every time I take the KX2 or KX3 miles 
away from humanity.

Wayne
N6KR


elecraft.com

> On Sep 10, 2020, at 12:53 PM, Al Lorona  wrote:
> 
> Power was shut off to my noisy urban neighborhood yesterday while crews 
> replaced a power pole. For a long time, I have wanted to check my HF noise 
> floor when the power is out, and yesterday was my chance.  For days like this 
> is why my station is solar-powered!
> 
> I expected to be surprised but I was absolutely blown away by what I heard. 
> The 40 meter noise floor was at least *17 dB* lower than normal. I could hear 
> layers and layers of signals that I never knew were there. Nets I never knew 
> existed… I mean, have you heard of the Montana Sheepherders net, for pity’s 
> sake? A midday 40 m pileup on a SOTA QRP CW station in Texas that I never 
> would have had a prayer of hearing normally. The noise was so low that I 
> could hear way, way down into the intermod of SSB signals—and most of them 
> were quite yucky. I heard birdies and crud from washing machines from what 
> must have been three blocks away. I heard the 7150 kHz 5th harmonic of a 
> local AM station. By measurement on the P3, I confirmed that all of these 
> signals would have been completely under my usual noise floor.
> 
> On 20, it was so quiet I almost believed that the K3’s receiver had failed. 
> WWV was coming in at a 56 dB signal-to-noise ratio.
> 
> Interestingly, 80 meters was also quieter, but not by as much. I’m not 
> complaining about nearly 10 dB less noise, but it’s too bad that power was 
> turned on before dark, before I could really evaluate the conditions.
> 
> When it gets this quiet, there are no ticks, crashes or noise transients of 
> any kind... just a gentle rushing sound, so it ‘feels’ even quieter than it 
> is. It was every bit as quiet as a forest Field Day a hundred miles from 
> civilization. Yes, radio was amazing yesterday for six glorious hours.
> 
> R,
> 
> Al  W6LX
> 
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[Elecraft] [OT] A Very Quiet Day

2020-09-10 Thread Al Lorona
Power was shut off to my noisy urban neighborhood yesterday while crews 
replaced a power pole. For a long time, I have wanted to check my HF noise 
floor when the power is out, and yesterday was my chance.  For days like this 
is why my station is solar-powered!

I expected to be surprised but I was absolutely blown away by what I heard. The 
40 meter noise floor was at least *17 dB* lower than normal. I could hear 
layers and layers of signals that I never knew were there. Nets I never knew 
existed… I mean, have you heard of the Montana Sheepherders net, for pity’s 
sake? A midday 40 m pileup on a SOTA QRP CW station in Texas that I never would 
have had a prayer of hearing normally. The noise was so low that I could hear 
way, way down into the intermod of SSB signals—and most of them were quite 
yucky. I heard birdies and crud from washing machines from what must have been 
three blocks away. I heard the 7150 kHz 5th harmonic of a local AM station. By 
measurement on the P3, I confirmed that all of these signals would have been 
completely under my usual noise floor.

On 20, it was so quiet I almost believed that the K3’s receiver had failed. WWV 
was coming in at a 56 dB signal-to-noise ratio.

Interestingly, 80 meters was also quieter, but not by as much. I’m not 
complaining about nearly 10 dB less noise, but it’s too bad that power was 
turned on before dark, before I could really evaluate the conditions.

When it gets this quiet, there are no ticks, crashes or noise transients of any 
kind... just a gentle rushing sound, so it ‘feels’ even quieter than it is. It 
was every bit as quiet as a forest Field Day a hundred miles from civilization. 
Yes, radio was amazing yesterday for six glorious hours.

R,

Al  W6LX

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