Hi John...Excellent video showing not only the ANC4 device but the types of noise we all suffer with these days.I have a Timewave ANC4 device and couldn't be without it now .....Ken G4VZV
Had a chance to watch this entire video. I don’t see that often. It was very well presented and very well understood. Thank you for taking the time you did to make it.
I am glad that you are enjoying your Timewave ANC-4. I recently picked up a W6LVP Magnetic Loop a few weeks ago and put it up about 20 ft on a Channel Master rotator and use it as my receive antenna on my ham station while using a 132 ft Carolina Windom antenna for transmit. I really have found a tremendous difference in noise after going to a loop. I also have a Timewave ANC-4 Noise reducing device that works great in combination with either antenna when fighting noise that is not nulled out by the loop because I am using the loop at times to pick between stations in different locations on the ham bands and also BCB stations. I have a 12 ft noise dipole at 3 ft above the ground for the ANC-4 that I placed right under my electrical power line pole. The combination of a loop and the ANC-4 has allowed me to enjoy listening to Shortwave like back in the 50s and 60s before all of the electrical environment issues we face today. 73s WD9GNG
@@ZAR66 I just wondered if it came with one or not. My ICOM 7300 doesn't have a seperate receive connector. So I was wondering if I would have to buy a seperate T/R switch if I changed out to the mag loop you said was better? I realize a T/R doesn't have anything to do with performance but that I need one to auto switch when I xmit is all I meant.
Thanks for video of info. I killed the power in my house last even to look for my noise, but found that the noise on my FTDX3000 running on a deep cycle marine battery did NOT reduce. I was actually a bit disappointed. I was just sure with all the computer controlled gadgets, and wall warts we use these days I'd find a reduction and start hunting for them room by room. I think I have my Dad's old Radio Shack Noise Canceller, and I'll see if I can find it and see if it helps any. I'm not electronicly sharp enough to understand just what form of noise I even have.
Great training video. Have a ANC-4 for about 8 years. Did the same thing with my station when I lived in a close home subdivision. The ANC-4 worked very well. I use small dipoles as sense antennas. Did not try small verticals. Moved out to 5 acres with not noise. Still have the ANC-4. I am doing to down load the video for club training class. Thanks again. WB4BYQ
Yes, would solve one problem of noise, go to work for a couple of days, and then a new noise problem would come up. It was noise hunt about twice a month. Would head out of house with a Yeasu FT-897D with a same dipole ant on a stick to walk the neighhood to find the house with the new noise. see the attached link atnm.mcars.us/HomeBrew/WB4BYQ/CommonModeChokes/ I would give these to the neighbors to install between the device and the wall outlet. Did switch to the FT-31 cores and snap on core. What made me move was the neighbor who purchased a Samsung Plasma 50 inch tv and a neighbor who was a very rude. But since I have moved both the neighbor with tv and the rude neighbor have moved. I tried both the MFJ and the Timewave/JPS phasing device and I liked the Timewave. I hope that some engineer would build a much improved Timewave type of device, the phasing system and the DSP I believe would help much on this problem, like to see it built into the radio itself. WB4BYQ
My Neighbor just purchased those Outdoor Lights- light strand...Party Lights..that's like 30 feet long. The Round bulb ones. The LED Lights put out S9+20db RF hash.. from 500 on the AM Band to 29000 Mhz.. It is a complete HF blocker. I need to go tell him but he's not a very "nice" neighbor to talk to, and I do want to do whatever it takes to fix the issue, but I think his personality is such that if he finds out that he is actively jamming my HF hobby, he might buy either more strands or just keep them turned on 24/7. He is a difficult person. So I am looking for a QRM blocker... Thanks for the Video..
@@VE6EY Thanks. One of the issues I found out is that they bought the LED light strands and then purchased another manufacturer’s dimming controller. Many of these Chinese manufactured LED lights say that their dimmers only work with their lights, I’m not sure if that is just marketing hype or ? But they have since unplugged the dimmer device and the noise has reduced substantially. I had thought that my 6m antenna putting out 100 Watts was triggering the lights to come on because the light strand was coming on by itself in the middle of the night and I thought I had tripped it but apparently the dimmer was defective. I had my wife compliment her (neighbor) about her lights and she shared the maker of the lights. I am still planning on buying a box to reduce the QRM. I learned that a pound of sugar goes farther than a whole bunch of vinegar when dealing with neighbors.
Hi John, loved the demo, good info so thanks for taking the time to do a detailed demo/review. I have to deal with a Plasma TV, and other unidentified noise and this might help my situation here. I also do a lot of RVing and have a HF rig installed in my 5th wheel but at a RV park with I hear lots of RV converters (switching power supplies) and when I'm dry camping I use a Generator with inverter technology and it also makes a lot of noise same as a switching power supply. So I'm thinking this might be a ticket to have better RV hamming. 73 Bill N7OQ
John, very good video. I am really surprised at the little power needed to disturb a neighbor. I hard no luck with the mfj but I think it is related to my noise antenna. I am also told that a dipole perpendicular to your transmit antenna does the job.
I get quite a bit of noise on 30m that completely wipes out all of the band and have not been able to figure where it is coming from, even on my magnetic loop I am unable to null it out I believe it is very close maybe next door apartment over. I am looking for a noise canceller but everywhere is out of stock here in the UK. great explanation by the way 73's
Hi John, appreciate this, it must have taken a lot of time and effort getting this all together. Personally I'm putting beads on every device causing interference, I might take a look into these noise cancelers as well to save some effort. It seems every new electrical device you are putting in your home is causing some sort of radio interference these days...
Hi John, you mention birdies, and what I have found with my SDR receiver is that almost all of my birdies are generated if I run the RF gain too high on my SDR receiver, and/or do not use an AM broadcast band reject filter. I'm always suspicious when I see very thin repeating lines in my SDR waterfall display that Birdies are being generated (especially if they suddenly disappear below a certain RF gain setting), and this is usually due to AM Broadcast Band signals being too strong into the front end of my SDR receiver. A simple AM broadcast band rejection filter installed between my RX antenna and receiver normally eliminates all of these birdies and allows me to use a higher RF gain setting birdie free. 73, Don (wd8dsb)
Good question but probably not. Specs are usually around 30-40 MHz. The theory would remain the same but circuits would need modification to reach up into VHF.
I just received a Time Wave ANC4 yesterday. Of course yesterday an hour before the receipt of said item the noise went back to my normal level of about S2 to S3. I have not found the source as of yet. Until this last week, noise was not a problem that I thought to be too much. However, now that my shack is getting better, I'm thinking that I may be able to pull in DX I've never heard before if I were to lower my average level. First I have contacted my electric company as I think it is a power pole issue. I will make a phone call to that utility today to reaffirm my complaint. The FCC by the way says that RFI caused by their company must be fixed by them at their cost. Even if only one ham operator is complaining. So that I would have a potential remedy to the problem before I start what may be a long journey with the utility company, I purchased the ANC4 with high hopes. I am very familiar with "Nulling" out an offending signal by using a wave trap with my Super crystal radio so I was very intrigued with this concept. Of course using a phase opposite to the offending noise is not want my wave trap is, but being able to visualize the process made me feel confident of this unit. Eighty some odd ratings on eham with 4.3 out of 5 stars didn't hurt. I will make my first attempt today but in all fairness to TimeWave, the noise I bought the unit to cancel is not present today. Either way I'm excited at the idea of ANYTHING that may increase my ability to pull in extremely weak signals. May the DX be with you
Hi John, Very good video, thanks for your work. I am having noise from lamps outside, I built a kit in Phase cancellar but not very effective as your presentation, Using my kit . the desire signal gets lower... perhaps a built problem I must check ! My first test I use for noise antenna a vertical Multiband VHF, I will go one trying to get a better result or buy a Timewave or MFJ. Thanks again for your work. Manuel Fernando - CT1BXX
You can experiment with different noise antenna's and find one that mainly receives "noise" and no signals. I find that when inserted, the noise canceller reduces all signals by around 6 dB. This is okay as long as it reduces the noise by a lot more! Thanks for your comment. 73 John VE6EY
G'day John Thanks for your video. Very informative. I have a DX Engineering NCC2 - a very capable box but had limited success with it. The noise I am experiencing is broadbanded, from 160m all the way through. Much weaker on the upper bands of course. It is a wooshing noise (which I would usually put down to a switch mode) but the broadband and power of it suggests to me that it could be a powerline noise...specifically maybe one of the transformers. Powerline noise is my biggest problem here because I have 33kv, 11kv and 450v lines running straight past my QTH. I have been using my 10m vertical as a noise antenna with reasonable success on bands above 40m. The problem is, it picks up a lot of white noise as well, and sometimes struggles to hear the powerline noise. I have tried a mag loop antenna, and I have also tried a miniwhip, all pretty useless. Do you think a couple of your antenna ideas might work? I feel as though, if you want to eliminate noise on particular bands, in order to match the amplitude on your main antenna, your noise antenna needs to be a generally good antenna on that band...although I have also heard that it is not a good idea to have a noise antenna hear the desired signal very well. The other thing I heard (and read in the NCC2 manual) is that you need to get the noise antenna copying the noise, but be at least 1/8 wave away from the main antenna. Thats hard to do on 160m of course. I do have an acre property thankfully, but still, ticking those two boxes is a challenge. DX Engineering have recommended a 18-24ft vertical as a noise antenna. I have not done that yet, so that is my next try. I spent a lot of money on this box, and I would really like to get value out of it. Any suggestions, particularly for eliminating broadband noise would be greatly appreciated. Regards Aaron VK2ON
Hi Aaron. My experience is that you want a noise antenna that does two things: picks up lots of the desired noise; picks up little of the desired signal. This way, when you mix the channels, you are only cancelling noise, not desired signal. In other words, the noise probe should be a fairly lousy antenna except for the noise you are trying to cancel. Think about it. If the noise probe is a good antenna, you may also be cancelling the desired signal when you phase the two together. I use 4-5 foot vertical dipole or ground plane as noise probes on different locations around my city lot. This is for use with outboard analog processors like NCC and ANC4. With my two loop 100 foot array, I can do some beamforming and place a null towards the noise on a diversity receiver. Distance between the antennas effects beamforming but not really noise cancellation. Any spacing is a compromise on different frequencies. My 100' loop array does good beamforming below 10 MHz, but works fine for noise cancellation everywhere.
Thanks John, great information! I believe my source of interference is a small retail store about 65 meters away using LED strip lighting in all of their windows. I am receiving it on a horizontal OCF dipole. I think I saw in the documentation for one of these noise cancelers that the noise and main antenna need to be the same polarization. In your example you showed your noise antennas vertically polarized. Is your main antenna vertical as well? Should my main and noise antenna polarization match? 73, Ralph KB1ZYI
Hi Ralph. No, my main antennas are generally horizontal (beam and dipole). Local RFI tends to be dominated by electric field and is almost always vertically polarized. I recommend that the noise antenna is vertically polarized to maximize pickup of the local noise. Your main antennas can be either polarization.
Okay... radio or television voice there first. Wow! Looking at this for my Yaesu FTDX 3000. I can receive well on it but have a lot of RF issues in my environment.
Thanks for your kind comments. Yes, my first career was in broadcasting, many years ago (1970-1983). Lots of fun but not great money, hi! If you take the time to set up good noise antennas, ANC-4 or similar devices can work wonders. 73 John
Yes it does. ANC4 has an RF detector circuit that senses a transmission and switches it out of the circuit. A T/R relay of sorts that can handle up to 250 watts from a transceiver.
Hello. Not sure if you still monitor this but I’ll ask anyway. This is K3TBA. I have an ICOM 7300 and just the other day I started getting RFI on 40 and 20 meter. They are evenly spaced all across the waterfall display. I checked my house by turning off the Main power and running off a battery. Nothing really changed after that test so it’s not coming from my house.
You might check my latest blog articles which compares various interference cancellers. Overall, both can work effectively with good noise antennas. I have come to prefer diversity reception for both beamforming and interference reduction.
It’s dropping the signal level by as much as the noise/interference. What’s the point? SNR remains the same. It does seem to be useful for birdies, but that’s about it.
Hi John...Excellent video showing not only the ANC4 device but the types of noise we all suffer with these days.I have a Timewave ANC4 device and couldn't be without it now .....Ken G4VZV
Had a chance to watch this entire video. I don’t see that often. It was very well presented and very well understood. Thank you for taking the time you did to make it.
I am glad that you are enjoying your Timewave ANC-4. I recently picked up a W6LVP Magnetic Loop a few weeks ago and put it up about 20 ft on a Channel Master rotator and use it as my receive antenna on my ham station while using a 132 ft Carolina Windom antenna for transmit. I really have found a tremendous difference in noise after going to a loop. I also have a Timewave ANC-4 Noise reducing device that works great in combination with either antenna when fighting noise that is not nulled out by the loop because I am using the loop at times to pick between stations in different locations on the ham bands and also BCB stations. I have a 12 ft noise dipole at 3 ft above the ground for the ANC-4 that I placed right under my electrical power line pole. The combination of a loop and the ANC-4 has allowed me to enjoy listening to Shortwave like back in the 50s and 60s before all of the electrical environment issues we face today.
73s
WD9GNG
Thanks for your feedback Ken. Yes, I agree that the ANC-4 truly helps. On the other hand, perhaps the best RFI fighter would be a time machine!
@@ZAR66 Does the Wellbrook have a xmit/receive relay box or do you need a separate receive connection on your transceiver?
@@ZAR66 I just wondered if it came with one or not. My ICOM 7300 doesn't have a seperate receive connector. So I was wondering if I would have to buy a seperate T/R switch if I changed out to the mag loop you said was better? I realize a T/R doesn't have anything to do with performance but that I need one to auto switch when I xmit is all I meant.
Best treatment of noise cancellation I have heard for many years!
Thanks my friend
Thanks for video of info. I killed the power in my house last even to look for my noise, but found that the noise on my FTDX3000 running on a deep cycle marine battery did NOT reduce. I was actually a bit disappointed. I was just sure with all the computer controlled gadgets, and wall warts we use these days I'd find a reduction and start hunting for them room by room. I think I have my Dad's old Radio Shack Noise Canceller, and I'll see if I can find it and see if it helps any. I'm not electronicly sharp enough to understand just what form of noise I even have.
Great training video. Have a ANC-4 for about 8 years. Did the same thing with my station
when I lived in a close home subdivision. The ANC-4 worked very well. I use small dipoles
as sense antennas. Did not try small verticals. Moved out to 5 acres with not noise. Still have the ANC-4. I am doing to down load the video for club training class. Thanks again.
WB4BYQ
Thanks very much for your comment, Richard. For the rest of us in the city, it's a never ending battle! 73 John
Yes, would solve one problem of noise, go to work for a couple of days, and then a new noise problem would come up. It was noise hunt about
twice a month. Would head out of house with a Yeasu FT-897D with a same dipole ant on a stick to walk the neighhood to find the house with
the new noise. see the attached link atnm.mcars.us/HomeBrew/WB4BYQ/CommonModeChokes/
I would give these to the neighbors to install between the device and the
wall outlet. Did switch to the FT-31 cores and snap on core. What made me move was the neighbor who purchased a Samsung Plasma 50 inch tv and a neighbor who was a very rude. But since I have moved
both the neighbor with tv and the rude neighbor have moved. I tried both
the MFJ and the Timewave/JPS phasing device and I liked the Timewave. I hope that some engineer would build a much improved Timewave type of device, the phasing system and the DSP I believe would help much on this problem, like to see it built into the radio itself.
WB4BYQ
My Neighbor just purchased those Outdoor Lights- light strand...Party Lights..that's like 30 feet long. The Round bulb ones. The LED Lights put out S9+20db RF hash.. from 500 on the AM Band to 29000 Mhz.. It is a complete HF blocker. I need to go tell him but he's not a very "nice" neighbor to talk to, and I do want to do whatever it takes to fix the issue, but I think his personality is such that if he finds out that he is actively jamming my HF hobby, he might buy either more strands or just keep them turned on 24/7. He is a difficult person. So I am looking for a QRM blocker... Thanks for the Video..
Sigh. RFI coming from power supply and radiated by the wiring, most likely. Given this is a point source, a noise canceller should help.
@@VE6EY Thanks. One of the issues I found out is that they bought the LED light strands and then purchased another manufacturer’s dimming controller. Many of these Chinese manufactured LED lights say that their dimmers only work with their lights, I’m not sure if that is just marketing hype or ? But they have since unplugged the dimmer device and the noise has reduced substantially. I had thought that my 6m antenna putting out 100 Watts was triggering the lights to come on because the light strand was coming on by itself in the middle of the night and I thought I had tripped it but apparently the dimmer was defective. I had my wife compliment her (neighbor) about her lights and she shared the maker of the lights. I am still planning on buying a box to reduce the QRM. I learned that a pound of sugar goes farther than a whole bunch of vinegar when dealing with neighbors.
Hi John, loved the demo, good info so thanks for taking the time to do a detailed demo/review. I have to deal with a Plasma TV, and other unidentified noise and this might help my situation here. I also do a lot of RVing and have a HF rig installed in my 5th wheel but at a RV park with I hear lots of RV converters (switching power supplies) and when I'm dry camping I use a Generator with inverter technology and it also makes a lot of noise same as a switching power supply. So I'm thinking this might be a ticket to have better RV hamming. 73 Bill N7OQ
John, very good video. I am really surprised at the little power needed to disturb a neighbor. I hard no luck with the mfj but I think it is related to my noise antenna. I am also told that a dipole perpendicular to your transmit antenna does the job.
I get quite a bit of noise on 30m that completely wipes out all of the band and have not been able to figure where it is coming from, even on my magnetic loop I am unable to null it out I believe it is very close maybe next door apartment over. I am looking for a noise canceller but everywhere is out of stock here in the UK. great explanation by the way 73's
As aggravating as QRM can be, my efforts to eliminate it for my Lowfer projects actually taught me more about radio than pretty much anything else.
Hi John, appreciate this, it must have taken a lot of time and effort getting this all together. Personally I'm putting beads on every device causing interference, I might take a look into these noise cancelers as well to save some effort. It seems every new electrical device you are putting in your home is causing some sort of radio interference these days...
Hi John, you mention birdies, and what I have found with my SDR receiver is that almost all of my birdies are generated if I run the RF gain too high on my SDR receiver, and/or do not use an AM broadcast band reject filter. I'm always suspicious when I see very thin repeating lines in my SDR waterfall display that Birdies are being generated (especially if they suddenly disappear below a certain RF gain setting), and this is usually due to AM Broadcast Band signals being too strong into the front end of my SDR receiver. A simple AM broadcast band rejection filter installed between my RX antenna and receiver normally eliminates all of these birdies and allows me to use a higher RF gain setting birdie free. 73, Don (wd8dsb)
Thanks for your comment my friend...
Hi John, Great video and very informative. Can you tell me if these noise cancelers work up to frequencies of 216+ mhz?
Good question but probably not. Specs are usually around 30-40 MHz. The theory would remain the same but circuits would need modification to reach up into VHF.
I just received a Time Wave ANC4 yesterday. Of course yesterday an hour before the receipt of said item the noise went back to my normal level of about S2 to S3.
I have not found the source as of yet. Until this last week, noise was not a problem that I thought to be too much.
However, now that my shack is getting better, I'm thinking that I may be able to pull in DX I've never heard before if I were to lower my average level.
First I have contacted my electric company as I think it is a power pole issue. I will make a phone call to that utility today to reaffirm my complaint.
The FCC by the way says that RFI caused by their company must be fixed by them at their cost. Even if only one ham operator is complaining.
So that I would have a potential remedy to the problem before I start what may be a long journey with the utility company, I purchased the ANC4 with high hopes.
I am very familiar with "Nulling" out an offending signal by using a wave trap with my Super crystal radio so I was very intrigued with this concept. Of course using a phase opposite to the offending noise is not want my wave trap is, but being able to visualize the process made me feel confident of this unit.
Eighty some odd ratings on eham with 4.3 out of 5 stars didn't hurt.
I will make my first attempt today but in all fairness to TimeWave, the noise I bought the unit to cancel is not present today.
Either way I'm excited at the idea of ANYTHING that may increase my ability to pull in extremely weak signals.
May the DX be with you
Hi John, Very good video, thanks for your work. I am having noise from lamps outside, I built a kit in Phase cancellar but not very effective as your presentation, Using my kit . the desire signal gets lower... perhaps a built problem I must check ! My first test I use for noise antenna a vertical Multiband VHF, I will go one trying to get a better result or buy a Timewave or MFJ.
Thanks again for your work.
Manuel Fernando - CT1BXX
You can experiment with different noise antenna's and find one that mainly receives "noise" and no signals. I find that when inserted, the noise canceller reduces all signals by around 6 dB. This is okay as long as it reduces the noise by a lot more! Thanks for your comment. 73 John VE6EY
G'day John
Thanks for your video. Very informative.
I have a DX Engineering NCC2 - a very capable box but had limited success with it. The noise I am experiencing is broadbanded, from 160m all the way through. Much weaker on the upper bands of course. It is a wooshing noise (which I would usually put down to a switch mode) but the broadband and power of it suggests to me that it could be a powerline noise...specifically maybe one of the transformers. Powerline noise is my biggest problem here because I have 33kv, 11kv and 450v lines running straight past my QTH. I have been using my 10m vertical as a noise antenna with reasonable success on bands above 40m. The problem is, it picks up a lot of white noise as well, and sometimes struggles to hear the powerline noise. I have tried a mag loop antenna, and I have also tried a miniwhip, all pretty useless.
Do you think a couple of your antenna ideas might work? I feel as though, if you want to eliminate noise on particular bands, in order to match the amplitude on your main antenna, your noise antenna needs to be a generally good antenna on that band...although I have also heard that it is not a good idea to have a noise antenna hear the desired signal very well.
The other thing I heard (and read in the NCC2 manual) is that you need to get the noise antenna copying the noise, but be at least 1/8 wave away from the main antenna. Thats hard to do on 160m of course. I do have an acre property thankfully, but still, ticking those two boxes is a challenge.
DX Engineering have recommended a 18-24ft vertical as a noise antenna. I have not done that yet, so that is my next try.
I spent a lot of money on this box, and I would really like to get value out of it. Any suggestions, particularly for eliminating broadband noise would be greatly appreciated.
Regards
Aaron
VK2ON
Hi Aaron. My experience is that you want a noise antenna that does two things: picks up lots of the desired noise; picks up little of the desired signal. This way, when you mix the channels, you are only cancelling noise, not desired signal. In other words, the noise probe should be a fairly lousy antenna except for the noise you are trying to cancel. Think about it. If the noise probe is a good antenna, you may also be cancelling the desired signal when you phase the two together. I use 4-5 foot vertical dipole or ground plane as noise probes on different locations around my city lot. This is for use with outboard analog processors like NCC and ANC4. With my two loop 100 foot array, I can do some beamforming and place a null towards the noise on a diversity receiver. Distance between the antennas effects beamforming but not really noise cancellation. Any spacing is a compromise on different frequencies. My 100' loop array does good beamforming below 10 MHz, but works fine for noise cancellation everywhere.
Great demonstration of the ANC-4, can't wait for mine to arrive. 73 N8AUM
Let me know your progress. Get the noise antennas right and it should work like a charm. 73 John
@@VE6EYI sure hope so, I have severe noise even tho I live outside the city. 73
Thanks John, great information! I believe my source of interference is a small retail store about 65 meters away using LED strip lighting in all of their windows. I am receiving it on a horizontal OCF dipole. I think I saw in the documentation for one of these noise cancelers that the noise and main antenna need to be the same polarization. In your example you showed your noise antennas vertically polarized. Is your main antenna vertical as well? Should my main and noise antenna polarization match?
73, Ralph KB1ZYI
Hi Ralph. No, my main antennas are generally horizontal (beam and dipole). Local RFI tends to be dominated by electric field and is almost always vertically polarized. I recommend that the noise antenna is vertically polarized to maximize pickup of the local noise. Your main antennas can be either polarization.
It seems to wipe out a significant portion of the sidebands as well.
Okay... radio or television voice there first. Wow!
Looking at this for my Yaesu FTDX 3000. I can receive well on it but have a lot of RF issues in my environment.
Thanks for your kind comments. Yes, my first career was in broadcasting, many years ago (1970-1983). Lots of fun but not great money, hi! If you take the time to set up good noise antennas, ANC-4 or similar devices can work wonders. 73 John
How do you keep your XMIT RF from getting into the noise or receive antennas? Does the ANC4 have any kind of protection from XMIT RF?
Yes it does. ANC4 has an RF detector circuit that senses a transmission and switches it out of the circuit. A T/R relay of sorts that can handle up to 250 watts from a transceiver.
@@VE6EY Not much use if I want to put 1KW out though...
Hello. Not sure if you still monitor this but I’ll ask anyway. This is K3TBA. I have an ICOM 7300 and just the other day I started getting RFI on 40 and 20 meter. They are evenly spaced all across the waterfall display. I checked my house by turning off the Main power and running off a battery. Nothing really changed after that test so it’s not coming from my house.
Hi there. You might check my web site play.fallows.ca for tons of information about fighting RFI. Contact me directly if you wish. 73 John
It's probably outdoor LED light strands.. I have the same problem. I am thinking of buying a blocking unit.
great video. 73
Now that diversity has been out would you recomend that over anc-4?
You might check my latest blog articles which compares various interference cancellers. Overall, both can work effectively with good noise antennas. I have come to prefer diversity reception for both beamforming and interference reduction.
It’s dropping the signal level by as much as the noise/interference. What’s the point? SNR remains the same. It does seem to be useful for birdies, but that’s about it.