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Not in a vehicle but NB does work
#1
Thought I'd post...
On 40M I heard a lot of noise, most likely QRM, .. shut my overhead dimmer to the shack (no help). It was a tick-tick-tick and about 100+hz. Very annoying. Not on other bands. Pressed the NB button and all went away. I'm new to this and thought that would be more for vehicle type noise (alternator/vehicle computer/etc.) but it worked for me. To the seasoned folks you probably already knew this, but I'm a "youngster" at this.
73, Steve - KC1SA
Reply
#2
Steve, have you looked at the ARRL "Sounds of RFI" page to see if you can find a match?

http://www.arrl.org/sounds-of-rfi

73,
Joe
KC1BAQ

(03-25-2014, 05:23 PM)KC1AXJ Wrote: Thought I'd post...
On 40M I heard a lot of noise, most likely QRM, .. shut my overhead dimmer to the shack (no help). It was a tick-tick-tick and about 100+hz. Very annoying. Not on other bands. Pressed the NB button and all went away. I'm new to this and thought that would be more for vehicle type noise (alternator/vehicle computer/etc.) but it worked for me. To the seasoned folks you probably already knew this, but I'm a "youngster" at this.
Reply
#3
I didn't know that site existed... my sound was like the electric fence but at about 2x the period.


(03-26-2014, 03:41 PM)KC1BAQ Wrote: Steve, have you looked at the ARRL "Sounds of RFI" page to see if you can find a match?

http://www.arrl.org/sounds-of-rfi

73,
Joe
KC1BAQ

(03-25-2014, 05:23 PM)KC1AXJ Wrote: Thought I'd post...
On 40M I heard a lot of noise, most likely QRM, .. shut my overhead dimmer to the shack (no help). It was a tick-tick-tick and about 100+hz. Very annoying. Not on other bands. Pressed the NB button and all went away. I'm new to this and thought that would be more for vehicle type noise (alternator/vehicle computer/etc.) but it worked for me. To the seasoned folks you probably already knew this, but I'm a "youngster" at this.
73, Steve - KC1SA
Reply
#4
If the "tick-tick" goes away with the NB then it is some sort of man made interference like a motor idling. Sounds like some sort of "spark" noise. Band noise" or band conditions would not go away with the NB.

You will also notice that engaging the noise blanker makes signals, especially strong ones sound distorted and also seems to make adjacent channel interference worse. So there is a trade off to killing the static, (QRN).

Al

(03-25-2014, 05:23 PM)KC1AXJ Wrote: Thought I'd post...
On 40M I heard a lot of noise, most likely QRM, .. shut my overhead dimmer to the shack (no help). It was a tick-tick-tick and about 100+hz. Very annoying. Not on other bands. Pressed the NB button and all went away. I'm new to this and thought that would be more for vehicle type noise (alternator/vehicle computer/etc.) but it worked for me. To the seasoned folks you probably already knew this, but I'm a "youngster" at this.

Al - N1API
Reply
#5
Do you think you can record it and attach it so we can hear?

If you have a portable am/fm radio, turn it on am and down near the lower end of the dial. Walk around your house and hold the radio next to different devices to see if you can locate it. You might also want to take it outside and see if it could be coming from one of your cars or perhaps one of your neighbors cars....or one parked on the street. Check all types of electronic charging devices, electric heaters, electric blankets, and your breaker box.

Keep us posted!

73,
Joe
KC1BAQ

(03-26-2014, 05:59 PM)KC1AXJ Wrote: I didn't know that site existed... my sound was like the electric fence but at about 2x the period.


(03-26-2014, 03:41 PM)KC1BAQ Wrote: Steve, have you looked at the ARRL "Sounds of RFI" page to see if you can find a match?

http://www.arrl.org/sounds-of-rfi

73,
Joe
KC1BAQ

(03-25-2014, 05:23 PM)KC1AXJ Wrote: Thought I'd post...
On 40M I heard a lot of noise, most likely QRM, .. shut my overhead dimmer to the shack (no help). It was a tick-tick-tick and about 100+hz. Very annoying. Not on other bands. Pressed the NB button and all went away. I'm new to this and thought that would be more for vehicle type noise (alternator/vehicle computer/etc.) but it worked for me. To the seasoned folks you probably already knew this, but I'm a "youngster" at this.
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