Miscellaneous Interference Sources

Ding dong, interference calling! Remote (wireless) doorbells are all the rage. No more drilling holes through door frames and the ability to place the receiver bell-unit anywhere in the home has made the battery powered devices popular. Sadly, many of the transmitters (and receivers) are cheap and poorly designed, and that poor …See more on ukqrm.uk

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[email protected] | Simple DF loop antenna

Here is a very simple method of constructing a DF loop antenna, take a look and make one, you never know when it may come in handy. Well here is the finished article, put it …

UKQRM | METECC LED Lamp Investigation

METECC LED Lamp Investigation. It started with a floor standing lamp. In July of 2010, Peter and Sharon Metcalfe, of the "EMC and LVD testing, training and consultancy" company, METECC, came across a lamp that seemed to advertise its complete lack of …

UKQRM | Interference from Power Line Technology

Interference from Power Line Technology. One of the most radio-polluting technologies produced (to date) that should not even be on the market! Our sister site: Ban PLT contains everything you ever wanted to know about PLT.

UKQRM | Your stories of QRM issues and how you resolved …

The pitfalls of LED lighting. Radio Amateur, Brian G4LUL, shares his experience of interference from LED lighting. December 2014 This interference was first noticed on a nearby FM receiver tuned to Radio 3 on 91.5MHz. As the distance between the victim receiver and the source was approximately 4m it was ignored as at that point no other problem had been …

UKQRM | Interference from Plasma Televisions

Interference from Plasma Televisions. Interference from plasma screens, as heard on a radio covering 1 to 30MHz, varies from a buzz (at low frequencies) to a white-noise (at higher frequencies) which exhibits peaks and troughs as you tune across the frequency range.

UKQRM And The Fight Against Noise | The …

UKQRM | Glossary of terms

Glossary of terms Technical terms. In many of our pages, we talk about conducted emissions and radiated emissions.What do we mean? Conducted Emissions. Conducted Emissions is a term for radio frequency current that flows on one or more conductors connected to an electric circuit, or alternatively, radio frequency voltage between conductors connected to an electric circuit.

[email protected] | Home

UKQRM is a group formed of Radio Amateurs, Shortwave radio listeners, Citizens' Band radio users, EMC professionals, and like-minded people, who discuss issues of non-EMC-compliance of electronic equipment and the danger posed to the radio spectrum. We are concerned with the rise in non-EMC-compliance of the following: * Switched Mode Power …

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[email protected] | BT has said it will "build like fury" to …

[email protected] Topics BT has said it will "build like fury" to roll out full-fiber internet connections after new rules announced by the UK's telecoms regulator (good by VDSL QRM in time).

Ukqrm / UKQRM : Interference to radio caused by non-EMC …

Ukqrm.uk has global traffic rank of 1,990,769. Ukqrm.uk has an estimated worth of US$ 8,566, based on its estimated Ads revenue. Ukqrm.uk receives approximately 1,564 unique visitors each day. Its web server is located in United Kingdom, with IP address 5.153.250.241. According to SiteAdvisor, ukqrm.uk is safe to visit.

[email protected] | Yahoo group

Graham Thanks for the heads up. The posting to re-join [email protected] was made on the UKQRM-OLD group I think these are some of the complications of re-naming a group, then creating another group with the original name. I note in my groups listings both groups have the same name! I will delete UKQRM-OLD shortly which will remove any ambiguity.

UKQRM : Interference to radio caused by non-EMC …

UKQRM is concerned with man-made radio interference, or to give it another name: pollution. Unlike tainted food, or unpleasant odours on the wind, humans cannot perceive radio …

UKQRM | Interference from Switched Mode …

Missing components. Fake power supply manufacturers are going to great lengths to pass off their products as the real thing. They will often submit a fully-compliant design for testing, only to remove a number of key filtering …

Mike Trodd – The SWLing Post

UKQRM And The Fight Against Noise The noisy cuprits--Comtrend's power line adapters. Whether you're new to shortwave radio listening or have been an amateur radio operator for years, more than likely you've occasionally encountered electrical interference, that annoying hum or buzz that permeates your listening experience.

UKQRM | The SWLing Post

Tag Archives: UKQRM Document radio interference via the Ofcom Spectrum Management Survey

EMC legislation and applicable laws.

Market surveillance authorities chose to ignore this fact, even after it was brought to their attention by UKQRM and by EMC professionals. Manufacturers are openly breaking the law and national agencies appear to be …

[email protected] | Polls

If members feel they would like to remain, I would certainly appreciate donations towards the costs. If a member wishes to pay in full via PayPal, I can provide the details needed. I have created this poll to gauge opinion. We have never used this method before, so I am unsure if it will work. 73 Gary Myers M0PLT Webmaster for BanPLT and UKQRM

UKQRM | The SWLing Post

Tag Archives: UKQRM Document radio interference via the Ofcom Spectrum Management Survey. 2 Replies. PLT devices can produce broad spectrum noise on the shortwave/amateur radio HF bands. Nige (G7CNF) recently contacted me regarding a survey he has created to help document and fight radio interference from power line technology and other sources.

[email protected] | Ofcom can do it they want

Peter i do not see were it says that they are using a SMPS. But just do a search for Vintage Light Bulbs and there are a lot out there, think they will have a massive job on there hands to locate all the ones that are likely to cause this problem like the one in question. 73 Ken G3SDW 73 Ken G3SDW

UKQRM | Your stories of QRM issues and how you …

[email protected] | 101 members now re-joined

Many thanks for inviting me to rejoin the UKQRM group. Good to see some stalwarts here. I learned a lot from you guys, and hopefully will learn more. Very Best Regards, Gary. toggle quoted message Show quoted text. From: [email protected] on behalf of Peter_G0RSQ ...

[email protected] | Messages

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[email protected] | Home

UKQRM is a group formed of Radio Amateurs, Shortwave radio listeners, Citizens' Band radio users, EMC professionals, and like-minded people, who discuss issues of non …

UKQRM

Fighting to save the radio spectrum from harmful and deliberate interference (QRM) caused by EMC non-compliant electronic devices, such as Power Line Technology (PLT), Switched Mode …

ban-plt.uk | Video evidence of PLT's effects.

Watch these videos of PLT in operation and what it does to radio. Mike Trodd, founder of UKQRM was the first to put PLT and the interference to the HF radio spectrum …

[email protected] | Re QRM from Samsung C24F390 LED …

From: [email protected] On Behalf Of Martin G0HDB Sent: 06 January 2021 20:34 To: [email protected] Subject: [UKQRM] QRM from Samsung C24F390 LED monitor? For the past 7-10 days my reception across much of the HF spectrum (up to 21MHz and probably beyond) has been all but wiped out by high levels of wideband noise …

Interference from lighting systems

Service Frequencies affected; Digital Audio Broadcast (DAB) 174 - 240 MHz: Marine VHF: 156 - 162.025 MHz: Amateur Radio 2 metre band: 144 - 146 MHz: Airband

UKQRM | Contact your MP

UKQRM urges you to write to your MP! Radio Interference Information. Contact your MP. If you feel as passionately as we do about the radio spectrum and its pollution, please let your MP know that the pollution of it is unnacceptible by writing to them to raise your concerns.

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Miscellaneous Interference Sources

[email protected] | Simple DF loop antenna

UKQRM | METECC LED Lamp Investigation

UKQRM | Interference from Power Line Technology

UKQRM | Your stories of QRM issues and how you resolved …

UKQRM | Interference from Plasma Televisions

UKQRM And The Fight Against Noise | The …

UKQRM | Glossary of terms

[email protected] | Home

Home

[email protected] | BT has said it will "build like fury" to …

Ukqrm / UKQRM : Interference to radio caused by non-EMC …

[email protected] | Yahoo group

UKQRM : Interference to radio caused by non-EMC …

UKQRM | Interference from Switched Mode …

Mike Trodd – The SWLing Post

UKQRM | The SWLing Post

EMC legislation and applicable laws.

[email protected] | Polls

UKQRM | The SWLing Post

[email protected] | Ofcom can do it they want

UKQRM | Your stories of QRM issues and how you …

[email protected] | 101 members now re-joined

[email protected] | Messages

[email protected] | Home

UKQRM

ban-plt.uk | Video evidence of PLT's effects.

[email protected] | Re QRM from Samsung C24F390 LED …

Interference from lighting systems

UKQRM | Contact your MP

UKQRM | METECC LED Lamp Investigation