News from the BBC of a SHINE (single high-level impulse noise)[*] that interfered with a Welsh village's internet connection on a daily basis.
The mystery of why an entire village lost its broadband every morning at 7am was solved when engineers discovered an old television was to blame.
[...] After 18 months engineers began an investigation after a cable replacement programme failed to fix the issue.
[...] Openreach engineers were baffled by the continuous problem and it wasn't until they used a monitoring device that they found the fault.
The householder would switch their TV set on at 7am every morning[sic] - and electrical interference emitted by their second-hand television was affecting the broadband signal.
The owner, who does not want to be identified, was "mortified" to find out their old TV was causing the problem, according to Openreach.
"They immediately agreed to switch it off and not use it again," said engineer Michael Jones.
While some properties in the surrounding area have Fibre to the Premises, several homes in the Aberhosan area are still limited to using copper-based ADSL connections.
[*] Broadband: Understanding REIN and SHINE.
(Score: 2, Interesting) by anubi on Thursday September 24 2020, @04:02AM
Almost everyone has a TV. Very few have the horizontal oscillator tube prone to barkhausen oscillation.
It was rare. But I've seen it. The wire between the horizontal oscillator tube and the horizontal output transformer is the antenna. The plate capacitance of the horizontal output tube is its resonant capacitor.
Boy, does that thing ever sing.
Watts of GHz RF. Pulsed. At 15,746 KHz. But the energy was in the GHz region. Right during flyback. When this thing was supposed to die out. But it didn't.
All over the GHz band.
This thing confounds many TV repairmen. I got several, too. It wasn't until years later I found out what caused this. At the time, I merely swapped tubes until I found one that worked, and returned the set to the customer.
Now, this was me working during High School working as a TV repairman.
Now, I've seen it before. And really suspect it.
Look here.
"Prove all things; hold fast that which is good." [KJV: I Thessalonians 5:21]