Amateur Radio - HF Interference

This is a sample of the HF Interference that I am experiencing at home.

The data noise above 16MHz is caused by a neighbour's BT Vision Powerline Adapter (Ethernet over Power Line), When this is removed, the data noise above 16MHz becomes silent.

The noise below 16MHz remains at all times, even when the Powerline Adapter is removed and the data noise is silent.

Please help me diagnose where this could be coming from! I have turned my entire house power off at the breaker and have run the radio from a 12v battery and the noise is the same. I have also tried a different radio with the same results.

Category:

Science & Technology

Tags:

• HAM
• Amateur
• Radio
• Interference
• HF
• BT
• Vision
• Powerline
• Adapter
• Noise
• Help!

[SmashlytheBassGod]

Hi,

I would like to sample a part of this for an introduction to a song I'm working on. Would this be ok?

Ta,

Smashley

[MrJoshuaUK]

Hey,

Of course - Make sure you send me a copy when it's done please, I'd love to hear what it sounds like!

Cheers

Josh

[MrJoshuaUK]

Oh and as an update to my previous posts, I replaced my neighbour's Switch Mode Power Supply (for her TFT monitor) and have had no problems since.

[scidept]

I would like to burn this to a DVD for use within our KS4 science lessons - communication systems and interference - Can I have your permission? Chris - Sci Tech

GD7ELF

[MrJoshuaUK]

Hi Chris - No problem at all. In fact, instead of upscaling a mushy YouTube video to DVD, I could do you a proper copy on DVD with a better explanation of what's happening if you'd like? Email me "josh at tigerstyle . co . uk" if you're interested? Cheers - Josh

[mikesndbs]

Hello, I would like to use part of your video and sound track in a update to the UKQRM video.

Would this be ok please?

Mike UKQRM

[MrJoshuaUK]

Hi Mike

No problem, if it helps other people out!

Cheers

Josh

[trifidsagitarius]

@SmashlytheBassGod

LOL Exactly what I was thinking. At one point I thought I was listening to the beginning of the WHO's Baba O'Riley.

[G7CNF]

BT is recalling ALL the PLT adapters they supplied made by Comtrend, citing a safety issue. The recall appeared only three days after the ITU Recommendation on PLT interference maximum levels... The adapters BT are using to replace them hide the pollution until the adapters are used, Lee Talbot of BT Vision Complaints wrote, "While customers are watching video-on-demand services the adaptors will be in normal power mode and emissions will be the same as the earlier models of Comtrend adaptor."

[superarticulation]

@SmashlytheBassGod Good point!

[battlestarone]

you have everything in there,plt,power line noise,and plasma noise...best of luck

[WinterWeatherII]

power line adapters should be outlawed

[knikk77]

is there a cellular mast around there, it sounds very much like cellphone base antenna. Or a wireless phone base station.