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Even the DNO get it wrong sometimes.

Kelly Marie Angel

Just recently there's been a lot of clicks and buzzes on my mediumwave listening set up  I tried to trace the cause  checking my station earth an RF earth not mains my areal and all the mains connection but all seemed OK. Anyhow after a few days I found the DNO had dug a hole in the next street and replaced a straight through  joint. I was hoping it had cured the noises but sadly not. About a week later they dug another hole replaced 3 joints in a space of only 50 feet 2 straight through joint and 1 splitter joint I think that's the right name for it. Finally the noise was cured but do the DNO  really look for noise or are they detecting something else like heat or vibration??

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  • DNO  really look for noise or are they detecting something else like heat or vibration??

    Some years ago we had niggling fault with the supply at work ... the DNO had several attempts to locate the fault as it gradually got worse and in the end they resorted to repeatedly replacing the substation fuse while their colleagues simply walked around listening for where the bang was loudest - and that's where they dug. Crude, but seemed effective! At a similar time we'd started using TDRs to locate faults on data network cables, so fancier technology certainly existed, but the DNO didn't seem to use them.

    In your case it might just be they kept digging up likely joints until downstream customer stopped complaining of flickering lights etc...

       - Andy.

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  • DNO  really look for noise or are they detecting something else like heat or vibration??

    Some years ago we had niggling fault with the supply at work ... the DNO had several attempts to locate the fault as it gradually got worse and in the end they resorted to repeatedly replacing the substation fuse while their colleagues simply walked around listening for where the bang was loudest - and that's where they dug. Crude, but seemed effective! At a similar time we'd started using TDRs to locate faults on data network cables, so fancier technology certainly existed, but the DNO didn't seem to use them.

    In your case it might just be they kept digging up likely joints until downstream customer stopped complaining of flickering lights etc...

       - Andy.

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