G4NSJ - Interference HF short medium wave amateur ham radio
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- Опубликовано: 20 мар 2023
- I had terrible interference on the HF bands, in fact short and medium wave in general. I eventually tracked down the source, which I least expected.
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Well done Ray, glad you managed to get rid of that wide band QRM. Unfortunately it's not always as easy as that, as I have found out. I have intermittent QRM issues with severe local noise which sounds just like that, from would you believe, yes an illuminated LED bathroom mirror of all things! Obviously another one of those cheap imports, that doesn't come with the mains filter built in. The main source of QRM though for most of the time, comes from next door LED kitchen lighting. Obviously those LED step down mains transformers, radiate well into the HF spectrum. In the evening 145 Mhz is plagued, by local QRM, from similar sources of interference, so can be as bad as HF at times. The only solution to all of this of course, would be to move away to somewhere remote, far enough away from noisy neighbour gadgets! Or as a last resort, if that's not at all possible, switch to an SDR on the Web. However I have a complex anti noise phasing system in place, which for most of the time works quite well at reducing the QRM to an acceptable level. Except the LED mirror, which can be a real nuisance at times, even if only for a limited period while someone is using the bathroom.
It's such a shame, AM is being killed off with interference and also being taken off broadcast 😪. Ray, I wish I was a young lad in your times to enjoy AM. Love your stories. Thank you from Crawley. Have a splendid day. Oh, I work at a hotel based at Gatwick Airport, and on the roof, I can see all of the downs, north to South. I need to test some radio on there. I will let you know how it works out.
Yes, do let me know how the test go. Sounds like a great site. AM was brilliant in the old days. Cheers for now, Ray.
Great content! I would have never thought about tracking down interference like that. Thanks for the tips. BTW, awesome looking unique radios that you restored.
Hi Frank, nice to hear from you. Cheers, Ray.
Glad you solved the noise problem ray best regards Gary Dublin 73s
Thanks!
Fantastic result, well done👍🏻
Thanks!
Result! Well done Ray!
Thanks, Pete!
Good on you mate!
Ray, my wife and I really love your videos, keep it up, thanks 🤣😵💯👌
That’s nice to know. Thanks! More videos coming soon. Cheers, Ray.
LEDs are bad yes but, Powerline Network Adapters being used to extend the internet through the house via the mains wiring are becoming a common source of QRM. Was using them myself and discovered how much noise they caused in the MW and SW bands after restoring an old tube radio. Can't believe they have allowed these things a production licence. Using a wifi repeater now and reception is much improved (I know these can cause issues but they don't usually wipe the whole band), certainly won't use the mains adapters again. Read they can disturb reception for some distance as they radiate through neighbouring properties wiring as well, using the same phase. They cause a sound like a motorcycle at full throttle.
You're right, power line network adapters and all this other stuff shouldn't be allowed to cause so many problems. I doubt it will ever change.
love to listen to am broadcasts in my car , its so much easier on the ears , fm to me just sounds harsh and it gets turned off after 5 minutes. Great video ray keep em coming cheers
Thanks, glad you liked the video.
Great! Job of trouble shooting! Well done thanks for sharing! N7ZV
Thanks Len!
Hi Ray, interesting video. This is exactly what I am experiencing here in Melbourne. It is especially strong on the low AM frequencies, though it does spread up the high end as well. The interference also spreads on to the low SW frequencies. I could blame nbn here, though this was even happening before nbn was installed. nbn is our current broadband here. I will still need to go outside and see if it is the broadband causing our problem and if so, I will contact my provider and see if I can get something done. I wonder if they thing they are blocking out the BBC here in Melbourne Australia, that may get them out faster!!! LOL. Anyway, wishing you the very best. Rob.
Hi Rob, these days, noise could be coming from anything and everything. It really ruins the hobby but, what can we do? Good luck with your provider! Cheers, Ray.
@@g4nsj Actually, my MW reception has recently improved. There has been less static and on early morning 21/4/23, I was even able to hear West Australia. Not sure if the static has gone for good, but I am enjoying the improved reception while it lasts.
@@RGC198 Australia… that’s good!
Well located Ray. Well worth letting the company know by via Twitter that theyve acted and fixed the problem.
Best way to contact them! 👍
I did let them know.
I have the same interference, I'll have to check if it is my broadband. Every once in a while I notice it has almost stopped but most of the time it is there. I thought maybe it was a LED streetlamp outside, or maybe the defunct gen 1 smart meter we have.
Might well be broadband. 👍
Hello great work, I have a AM valve car radio that does not work with a 5m coax cable and aerial but works with a 1m coax cable and aerial. Do you have any suggestions as I cannot move the aerial?
Hi Adam, That's strange. All I can think is that coax for a car radio should be 300 ohm. Maybe you're using the wrong coax?
It just goes to show that this kind of interference CAN be suppressed if only the companies can be bothered.
(Incidentally, in my experience ALL computers are female. At least, I can't understand them.)
Haha, all computers… love it! 👍
You can watch the video s on them on utube
I have the same in leicester almost like a 60hz hum
It's not just me then.
@@g4nsj Nope
Get an mfj 1026 noise cancelling unit Ray . there very good cheers Gary in Dublin
I just got one to try and conquer my neighbor’s solar power system. It works a treat, and you should be able to get one at a hamfest for 100 USD or less…they’ve gone up to 230-269 USD since COVID/Chip Shortage/Inflation.
I got one too. It knocks out the crap that comes from my neighbours house a treat. Makes the hf bands useable again.
I'm glad you got to the bottom of the problem. Am I allowed to say bottom ?
Haha, of course! It was a real bummer to sort it out! 🤣😂
@@g4nsj lol 👍😆
Ray its cable broadband.
Indeed it is! 👍
Would this be the same interference/noise that you get on Cb radio particularly ‘the muppets’? ...... I went back on there the other day after 30 or so years an was appalled at the noise level, I checked my equipment thinking it was me lol
Yes, probably. There’s so much noise everywhere these days. Such a shame.
I blamed it at first on the amount of chargers we all use these days or even thought it might be from the ring main
@@paul1962uk I agree!
Would winding the coax in a ferrite ring help with the high noise signal?
Yes, that would help.
I thought that you had retired from radio repairs?
I have, this is my own gear. 👍
Also parts of an old video.
Ray, you need to be careful in today's world of woke as I'm sure you might have miss gendered that computer😮😮😮😮
🤣😂👍 Oops!