Noise on all HF Bands

Discussion in 'Interference Problems' started by Kev, Oct 27, 2015.

  1. Kev

    Kev Member

    Another update:

    Daytime noise is pretty much sorted out, especially when trying to decode WX sats on 137 mhz

    After my initial tests through the day time hours, is all looking sweet, night time however is not as improved, although it is a an improvement, something is better than nothing after all, 40m is still picking up a lot of noise, quite a nasty buzzing sound when on am to monitor it, it goes across all the bands, it makes SSB difficult, We may have to pack up using it at night at this location, this week I will look further into it to see if it is the new system that is fitted, I can still see traces of the old system from the next building close to us.

    I do not think the housing will want to change what they have fitted, in case it is those new units, which now means I have to buy a set and send off to Dr David Lauder for testing to make sure they meet the EMC regs, they could be just on the limit, but combine 7 of them in close proximity, plus what they have fitted to the other buildings as well as the old system still in place on some of them and you have another headache to deal with..

    So although it's a good improvement, daytime is lovely, more works still needs to be done for night time, do I even bother..

    Anyway's, you can lead the horse to water & make it drink, what comes out the back of the horse is another matter..

    Regards

    73

    Kev de 2E0WCK..
    Ken G3SDW likes this.
  2. Kev

    Kev Member

    Greetings,

    I can now confirm this new LED lighting system that has been installed does create RFI, but only when they first come on, which sounds great, but it last for about 4-5 hours, I would imagine they are all charing the emergency battery unit inside them, then after that the noise reduces almost back to daytime, the only difference this time is that we are still picking up RFI from the older system, probably from the next building.

    As the nights are starting to draw in earlier each day, I will monitor the time it takes to charge these units, I know what the noise will be like when one of those batteries can no longer charge up, so am pleased we now have someone to come and maintain it all on a regular basis.

    For now, I think we need to get one of these new LED light with Ballast/Emergency Charge Unit and Battery to get tested, it would not suprise me if they are not within said EMC regs, if they are not, then at least I can present the housing with this information, I also think it is worth getting this all tested for the report that David has been conducting.

    The main bands it effects is 40m, 30m, 17m, 15m, 10m, 6m, and it does effect WX Sat decoding, but only when the charge units are recharing the batteries.

    The old lighting system in the next building is still effecting 80m, 40m and does make it diffuclut, all the other bands are much improved at night.

    I will post up some video footage soon, I have done plenty of recordings now, I just need a rest up to recharge so I can post them all up..

    People might think we are ungrateful or something, we have got this far now, my only real concern is this, this new lighting system is not in all the buildings near us, yet, but over the next year or two they will all be this new system, I am wondering what the noise floor would be if over 40 of them was installed, and I do understand they are not charging all the time, so that's a result, I just want to do it all properly, now we have a new system, let's see if it matches upto its said Certificate of Compliance that was kindly provided for me, I don't want to say "I told you so", so we live in hope everything is as it should be, until we test it all properly, hi hi..

    Regards

    Kev, de 2E0WCK..
    M6VWM and Ken G3SDW like this.
  3. G0SZI

    G0SZI New Member

    I'm keen to know what the final outcome of this was even though it's been a couple of years. It's been very interesting reading but unfortunately not surprised how it was dealt with in this day and age of bureaucracy.
    Kev likes this.
  4. Ken G3SDW

    Ken G3SDW Moderator

    Think you need to contact Kev 2E0WCK
    73
    Ken
    G3SDW
    Kev likes this.
  5. G0SZI

    G0SZI New Member

    Thanks Ken I would try to on the radio but guess what I've a nice new 7610 sat on the side that I don't use because Funnily enough I cant hear anybody Most of the time. Got a nice new MFJ1026 too lol

    danny
    Kev likes this.
  6. Ken G3SDW

    Ken G3SDW Moderator

    Hi Danny I take it you have an interference problem ?
    73
    Ken
  7. Kev

    Kev Member


    Hi Danny,

    The outcome:
    Once we could confirm what the cause of our noise, I then contacted the housing association once more, this time i wasn't taking no for an answer, I emailed the head of housing with a detailed report of what the problem was, ie it was the old D type CFL lighting that was used for all the buildings in this road and that the emergency batteries had failed, 48 lights i think in all, each one doubled as an emergency light, so in effect it has a separate battery behind each one of them in the unit, which was dead, in fact the date of install was 2012 and none of the lighting had been maintained in that time to test to see if they work with no mains power at all, this was a fundamental breakdown in fire safety servicing and lucky we never had a fire in any of the buildings.

    The fact these lights was used as "Emergency Lighting" was the ONLY reason they changed them, all the lights except just a few have all been replaced with an LED emergency system and the ones that have not been replaced with be when the bulbs next blow, a new contractor was employed to carry out the servicing every 6 months, the servicing of these lights has already failed as one was replaced outside my front door and its no longer an emergency light, but its the only one i know of in all the blocks that they have not bothered to do correctly, I could if i wanted to open up another can of worms this time invite the local fire brigade to test them at random, but to be totally honest, the light that's not been replaced is not causing a problem as its just a light which does work and does not cause any problem as it no longer has the emergency battery unit attached any more, this is of course in breach of the regulations, and as its an outside light, it doesn't really make a difference if their was a fire or not, but still its not correct.

    The current noise levels from the few existing old lights do cause noise, but as they are some distance away and its not a 9+10bd noise, and does not interfere with my radio work at all.

    I recently spoke to Ken Underwood and he asked how things was, well done Ken, and all i can say is this, since all that happened with the building lights where we live, we now have a new building that has gone up, its a huge Lidl, and i do get noise from that with the outside lighting and air con units that do cause some noise, however, its not 9+10bd, and its just on my background radiation noise limit and is around 3 to 5db, its more than liveable, and is a dirty noise, where before we had no dirty noise at all, I wont be doing a thing about it.

    We are so grateful of all the help we got from Ken and Dr David Lauder and the team in general, David was going to do a report and send it over, but i managed to deal with it with the housing, although i did tell the housing an independent specialist came along, not just anyone, but the leading expert in the UK to identify the problem and as its an emergency lighting problem i would swiftly take legal action in a county court should they ignore me again, as well as getting the press involved and the local MP, it worked, and they did the right thing, should the lighting have been not emergency lights i think things would have been more difficult and i would of gone to the county court to seek an injunction on them for breach of contract as i am paying for a service that's not being done, it would of been my only recourse.

    We have since had all new street lighting put in, which is also LED and yes they also cause a noise, but they are far away enough from my antennas not to give me any grief.

    I will always be aware if i get that tell tall buzzing and 9+10db noise that the emergency battery backups have failed in the lights, so i can then get on the phone to housing and tell them, and as they are emergency lights i know they have a duty to do them pronto..

    I hope this answers any questions you have, and i would like to apologise for any delays in reply.

    All the best

    73.

    Kev, de 2E0WCK..
    Ken G3SDW likes this.
  8. Ken G3SDW

    Ken G3SDW Moderator

    Theres a moral to your story Kev, never give up, it maybe a steep hill to climb but it will get slower but once you have got to the top its plain sailing going down to the bottom.

    It was hard Kev but you got there, seems as though Danny has a problem but if he does not seek help like you did then it will only get worse.

    Well done that man.
    Kev likes this.
  9. Kev

    Kev Member

  10. Kev

    Kev Member

    Hi Ken, cheers mate, it did seem at one point that it was all over, lol, but you really did help mate, so thank you so much, all the team, you all do good work in difficult conditions.

    This unfortunately is part of our hobby is noise and something we really do have to deal with and not give up, i for one is fully aware of how it can be, the hill does look steep and almost never ending, but if i can do it, anyone can, i do think i had a bit of luck with me regarding it being the emergency lighting, it put the power back into my pocket.

    We are both grateful, myself and Tina 2E0DTK for all the help from the RSGB,

    I am happy to help anyone with any of this knowledge, and hope when others read this after all what's written before, it can be done, we can do it, and yes it can be a pain and take some time, 2 years is a bit extreme, but it was what it was, and we did it.

    I have learnt a massive amount doing this, the knowledge we gain is another tool in our amateur pack of goodies, hopefully we can pass on to others.

    I will leave that there then.

    Good luck Danny, your welcome to get in touch should you need too.

    Best of luck Ken, keep up the good work team, and best of luck to everyone else.

    73

    Kev de 2E0WCK..
    M6VWM likes this.
  11. Ken G3SDW

    Ken G3SDW Moderator

    Thanks Kev, now you know why i have grey hair, and not a lot of it now lol
    Kev likes this.

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