Re: Help with 75 mtr Qrn problem
I have called PG&E and the guy came out with a 430 Rx with a beam saying it's not there problem - humm - The Lev stays at a S-7 and then when sun comes up it goes to a S-9 20 over
both Ants were fine for 2 years .. then the QRN .. it did go away for about 1 week now back for 1 month
Tnx for all responce .
Dave
----- Original Message ----- From: "K4FEG" [email protected] To: "Dave Larsen PhD" [email protected] Sent: Friday, August 02, 2013 3:50 PM Subject: Re: [amsat-bb] Help with 75 mtr Qrn problem
On 8/2/2013 05:23 PM, Dave Larsen PhD wrote:
I have 2 dipoles up at 60+ ft - one set running East-West other North South .. From 2.6 to 5 Megs I have a S-7 Qrn lev at 4 Am .. buy noon I have a 10-20 over QRN Lev .. I live on 10 acres and have turned off main power to house and still have QRN .. so not coming from anything in house .. This one has me stumped .. 6 moths ago my Qrn was a S-2 .. waiting for a G6 radio to try and track this down but does anybody else have any idea's ?
Tnx
Dave N6CO _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
there is a possibility that you have a nearby electrical transformer that has a corroded connection on it, these connections can be a major source of noise and they will come and go with changes in humidity or precipitation. will it suddenly stop at times are is it a fairly constant level?
your local utility company can find and repair these connections but they need a better idea of the direction it is from your QTH.
Those are my thoughts on your problem Good Luck Frank; K4FEG
Hi Dave,
If the noise came and went sharply (like someone turned something off for a week), and "man made" sounding, perhaps one of your neighbors put up a solar power array? Lots of diodes and the power inverter running during the day...
Just a thought,
Greg KO6TH
Dave Larsen PhD wrote:
I have called PG&E and the guy came out with a 430 Rx with a beam saying it's not there problem - humm - The Lev stays at a S-7 and then when sun comes up it goes to a S-9 20 over
both Ants were fine for 2 years .. then the QRN .. it did go away for about 1 week now back for 1 month
Tnx for all responce .
Dave
----- Original Message ----- From: "K4FEG" [email protected] To: "Dave Larsen PhD" [email protected] Sent: Friday, August 02, 2013 3:50 PM Subject: Re: [amsat-bb] Help with 75 mtr Qrn problem
On 8/2/2013 05:23 PM, Dave Larsen PhD wrote:
I have 2 dipoles up at 60+ ft - one set running East-West other North South .. From 2.6 to 5 Megs I have a S-7 Qrn lev at 4 Am .. buy noon I have a 10-20 over QRN Lev .. I live on 10 acres and have turned off main power to house and still have QRN .. so not coming from anything in house .. This one has me stumped .. 6 moths ago my Qrn was a S-2 .. waiting for a G6 radio to try and track this down but does anybody else have any idea's ?
Tnx
Dave N6CO _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
there is a possibility that you have a nearby electrical transformer that has a corroded connection on it, these connections can be a major source of noise and they will come and go with changes in humidity or precipitation. will it suddenly stop at times are is it a fairly constant level?
your local utility company can find and repair these connections but they need a better idea of the direction it is from your QTH.
Those are my thoughts on your problem Good Luck Frank; K4FEG
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Can you hear it on the AM broadcast band?
If so use the ferrite rod antenna to get directions of it and have yourself a fox hunt.
Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 8/2/2013 9:40 PM, Greg D wrote:
Hi Dave,
If the noise came and went sharply (like someone turned something off for a week), and "man made" sounding, perhaps one of your neighbors put up a solar power array? Lots of diodes and the power inverter running during the day...
Just a thought,
Greg KO6TH
Dave Larsen PhD wrote:
I have called PG&E and the guy came out with a 430 Rx with a beam saying it's not there problem - humm - The Lev stays at a S-7 and then when sun comes up it goes to a S-9 20 over
both Ants were fine for 2 years .. then the QRN .. it did go away for about 1 week now back for 1 month
Tnx for all responce .
Dave
----- Original Message ----- From: "K4FEG" [email protected] To: "Dave Larsen PhD" [email protected] Sent: Friday, August 02, 2013 3:50 PM Subject: Re: [amsat-bb] Help with 75 mtr Qrn problem
On 8/2/2013 05:23 PM, Dave Larsen PhD wrote:
I have 2 dipoles up at 60+ ft - one set running East-West other North South .. From 2.6 to 5 Megs I have a S-7 Qrn lev at 4 Am .. buy noon I have a 10-20 over QRN Lev .. I live on 10 acres and have turned off main power to house and still have QRN .. so not coming from anything in house .. This one has me stumped .. 6 moths ago my Qrn was a S-2 .. waiting for a G6 radio to try and track this down but does anybody else have any idea's ?
Tnx
Dave N6CO _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
there is a possibility that you have a nearby electrical transformer that has a corroded connection on it, these connections can be a major source of noise and they will come and go with changes in humidity or precipitation. will it suddenly stop at times are is it a fairly constant level?
your local utility company can find and repair these connections but they need a better idea of the direction it is from your QTH.
Those are my thoughts on your problem Good Luck Frank; K4FEG
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
On 03/08/13 12:40, Greg D wrote:
Hi Dave,
If the noise came and went sharply (like someone turned something off for a week), and "man made" sounding, perhaps one of your neighbors put up a solar power array? Lots of diodes and the power inverter running during the day...
I sympathise with the original poster and have exactly the same problem; 20dB over S9, or worse, up to 21MHz.
My initial though was likewise that our 3KW solar system was the cause and although it does add to the noise, switching it off barely makes a difference. Our mains powered LED lighting also adds a little to the noise, most noticeable at around 7MHz.
We live in a small town in the middle of nowhere and our closest neighbours are 500 metres away. So that only leaves the overhead street electricity cables and or the high tension cables that lead to the switching yard some 2km from our house. We have underground cables from the street to the house.
Whatever the cause, HF operation is out of the question at the moment. If I can muster some enthusiasm I might investigate a loop aerial.
Hi Dave, N6CO
To find out from where the noise come out you need a MFJ-852 Meter A/C Line Noise Meter visible in the following internet address:
http://www.mfjenterprises.com/Product.php?productid=MFJ-852
It is currently used by the Electricity Companies in England.
73" de
i8CVS Domenico
----- Original Message ----- From: "Dave Larsen PhD" [email protected] To: [email protected] Sent: Saturday, August 03, 2013 1:28 AM Subject: [amsat-bb] Re: Help with 75 mtr Qrn problem
I have called PG&E and the guy came out with a 430 Rx with a beam saying it's not there problem - humm - The Lev stays at a S-7 and then when sun comes up it goes to a S-9 20 over
both Ants were fine for 2 years .. then the QRN .. it did go away for
about
1 week now back for 1 month
Tnx for all responce .
Dave
----- Original Message ----- From: "K4FEG" [email protected] To: "Dave Larsen PhD" [email protected] Sent: Friday, August 02, 2013 3:50 PM Subject: Re: [amsat-bb] Help with 75 mtr Qrn problem
On 8/2/2013 05:23 PM, Dave Larsen PhD wrote:
I have 2 dipoles up at 60+ ft - one set running East-West other North South .. From 2.6 to 5 Megs I have a S-7 Qrn lev at 4 Am .. buy noon I have a 10-20 over QRN Lev .. I live on 10 acres and have turned off main power to house and still have QRN .. so not coming from anything in house .. This one has me stumped .. 6 moths ago my Qrn was a S-2 .. waiting for a G6
radio
to try and track this down but does anybody else have any idea's ?
Tnx
Dave N6CO _______________________________________________ Sent via [email protected]. Opinions expressed are those of the
author.
Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
there is a possibility that you have a nearby electrical transformer
that
has a corroded connection on it, these connections can be a major source of noise and they will come and go with changes in humidity or precipitation. will it suddenly stop at times are is it a fairly
constant
level?
your local utility company can find and repair these connections but
they
need a better idea of the direction it is from your QTH.
Those are my thoughts on your problem Good Luck Frank; K4FEG
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
participants (5)
-
Dave Larsen PhD -
Greg D -
i8cvs -
Joe -
Phil