<div>What's the proximity to the 6PR transmitter? I've heard AM radio off a chain link fence under the right conditions. That stuff gets into everything.</div><div><br></div><div>If it's only happening on a single floor there is something ungrounded there. Hard to track down though, best to get in a professional.</div><div><br></div><div><br><div class="gmail_quote"><div>On Mon, 20 Mar 2017 at 7:14 pm, Chris Hurley <<a href="mailto:chris@minopher.net.au">chris@minopher.net.au</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-serif" class="gmail_msg"><div class="gmail_msg"><div class="gmail_msg">I would get it tracked down by suitable people, it’s one of those things 90% of time not a biggie but you don’t want that 3am call out and then trying to find a floating earth or an earth leakage fault. And it will be in the middle of a down pour increasing the problem.</div><div class="gmail_msg"> </div><div class="gmail_msg"><div class="gmail_msg">Regards,</div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg"><div class="gmail_msg">Chris Hurley BE (Elec)</div><div class="gmail_msg">Signal Manager</div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">******************************************************</div><div class="gmail_msg">Dragon Rail Pty Ltd Phone: 1300 730 531 </div><div class="gmail_msg">74 Allanfield Crescent </div><div class="gmail_msg">Boronia, 3155 Victoria </div><div class="gmail_msg">Australia </div><div class="gmail_msg">******************************************************</div></div><div class="gmail_msg"><br class="gmail_msg"></div></div></div><div class="gmail_msg"><br class="gmail_msg"></div><span id="m_2516449513263501422OLK_SRC_BODY_SECTION" class="gmail_msg"><div style="font-family:Geneva;font-size:10pt;text-align:left;color:black;BORDER-BOTTOM:medium none;BORDER-LEFT:medium none;PADDING-BOTTOM:0in;PADDING-LEFT:0in;PADDING-RIGHT:0in;BORDER-TOP:#b5c4df 1pt solid;BORDER-RIGHT:medium none;PADDING-TOP:3pt" class="gmail_msg"><span style="font-weight:bold" class="gmail_msg">From: </span> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net" class="gmail_msg" target="_blank">ausnog-bounces@lists.ausnog.net</a>> on behalf of Paul Wilkins <<a href="mailto:paulwilkins369@gmail.com" class="gmail_msg" target="_blank">paulwilkins369@gmail.com</a>><br class="gmail_msg"><span style="font-weight:bold" class="gmail_msg">Date: </span> Monday, 20 March 2017 at 6:55 PM<br class="gmail_msg"><span style="font-weight:bold" class="gmail_msg">To: </span> "<a href="mailto:ausnog@lists.ausnog.net" class="gmail_msg" target="_blank">ausnog@lists.ausnog.net</a>" <<a href="mailto:ausnog@lists.ausnog.net" class="gmail_msg" target="_blank">ausnog@lists.ausnog.net</a>><br class="gmail_msg"><span style="font-weight:bold" class="gmail_msg">Subject: </span> Re: [AusNOG] Earthing problems and switching infrastructure.<br class="gmail_msg"></div></span></div><div style="word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-serif" class="gmail_msg"><span id="m_2516449513263501422OLK_SRC_BODY_SECTION" class="gmail_msg"><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg"><div class="gmail_msg"><div class="gmail_msg">Doubtful. You're not going to be inducing 0.5V. I'd be more worried that the ground is floating, which definitely can cause signal and equipment problems.<br class="gmail_msg"><br class="gmail_msg"></div>Kind regards<br class="gmail_msg"><br class="gmail_msg"></div>Paul Wilkins<br class="gmail_msg"></div><div class="gmail_extra gmail_msg"><br class="gmail_msg"><div class="gmail_quote gmail_msg">On 20 March 2017 at 18:36, Peter Tiggerdine <span class="gmail_msg"><<a href="mailto:ptiggerdine@gmail.com" class="gmail_msg" target="_blank">ptiggerdine@gmail.com</a>></span> wrote:<br class="gmail_msg"><blockquote class="gmail_quote gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">the radio station is 6PR so it's AM.<br class="gmail_msg"><br class="gmail_msg">
There's no onsite PABX or music being fed into it.<br class="gmail_msg"><br class="gmail_msg">
It's happens on one floor of a multi storey building.<br class="gmail_msg"><br class="gmail_msg">
Is the consensus that this type of interference can cause network<br class="gmail_msg">
performance problems?<br class="gmail_msg"><span class="m_2516449513263501422im m_2516449513263501422HOEnZb gmail_msg">Regards,<br class="gmail_msg"><br class="gmail_msg">
Peter Tiggerdine<br class="gmail_msg"><br class="gmail_msg">
GPG Fingerprint: 2A3F EA19 F6C2 93C1 411D 5AB2 D5A8 E8A8 0E74 6127<br class="gmail_msg"><br class="gmail_msg"><br class="gmail_msg"></span><div class="m_2516449513263501422HOEnZb gmail_msg"><div class="m_2516449513263501422h5 gmail_msg">On Mon, Mar 20, 2017 at 5:07 PM, Paul Wilkins <<a href="mailto:paulwilkins369@gmail.com" class="gmail_msg" target="_blank">paulwilkins369@gmail.com</a>> wrote:<br class="gmail_msg">
> Any analog telephony streaming music on hold from the internet? So just<br class="gmail_msg">
> appears it's coming over the air, but actually EMI bleeding from their MOH<br class="gmail_msg">
> server?<br class="gmail_msg">
><br class="gmail_msg">
> Kind regards<br class="gmail_msg">
><br class="gmail_msg">
> Paul Wilkins<br class="gmail_msg">
><br class="gmail_msg">
> On 20 March 2017 at 17:40, Damien Gardner Jnr <<a href="mailto:rendrag@rendrag.net" class="gmail_msg" target="_blank">rendrag@rendrag.net</a>> wrote:<br class="gmail_msg">
>><br class="gmail_msg">
>> Few questions..<br class="gmail_msg">
>><br class="gmail_msg">
>> How 'local' is the radio station? Within a km? or just within 50km? AM<br class="gmail_msg">
>> or FM station?<br class="gmail_msg">
>><br class="gmail_msg">
>> Do they hear the radio station if they touch the probe to themselves?<br class="gmail_msg">
>><br class="gmail_msg">
>> Does the customer have a PABX with that radio station fed into it from a<br class="gmail_msg">
>> connected radio?<br class="gmail_msg">
>><br class="gmail_msg">
>> If no fed PABX, and the station is FM that is VERY unusual. AM, I could<br class="gmail_msg">
>> understand, if there's a IF being generated by some equipment which is<br class="gmail_msg">
>> modulating at almost exactly the station's frequency.<br class="gmail_msg">
>><br class="gmail_msg">
>> I'd be finding the building's MEN bond, and testing there, then working<br class="gmail_msg">
>> your way back out to the individual equipment, and see where it's<br class="gmail_msg">
>> introduced. That said, I'd probably just call a qualified electrician, as<br class="gmail_msg">
>> they're more likely to spot the issue, and you'll likely need to take the<br class="gmail_msg">
>> front off the switchboard to get at the bond point.<br class="gmail_msg">
>><br class="gmail_msg">
>> On 20 March 2017 at 17:24, Peter Tiggerdine <<a href="mailto:ptiggerdine@gmail.com" class="gmail_msg" target="_blank">ptiggerdine@gmail.com</a>> wrote:<br class="gmail_msg">
>>><br class="gmail_msg">
>>> Hi All,<br class="gmail_msg">
>>><br class="gmail_msg">
>>> I've got a customer that can touch any steel object that's connected<br class="gmail_msg">
>>> to earth and listen to the local radio station with a tone generator<br class="gmail_msg">
>>> wand. I've chalked this up an earthing problem touching a copper rod<br class="gmail_msg">
>>> or possibly building antenna.<br class="gmail_msg">
>>><br class="gmail_msg">
>>> The question is weather this is likely to impact switches and possibly<br class="gmail_msg">
>>> network performance. I'm airing on the side of very unlikely but it's<br class="gmail_msg">
>>> all frequency so unsure.<br class="gmail_msg">
>>><br class="gmail_msg">
>>> Happy for off list or on list replies.<br class="gmail_msg">
>>><br class="gmail_msg">
>>> Regards,<br class="gmail_msg">
>>><br class="gmail_msg">
>>> Peter Tiggerdine<br class="gmail_msg">
>>><br class="gmail_msg">
>>> GPG Fingerprint: 2A3F EA19 F6C2 93C1 411D 5AB2 D5A8 E8A8 0E74 6127<br class="gmail_msg">
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>><br class="gmail_msg">
>><br class="gmail_msg">
>><br class="gmail_msg">
>><br class="gmail_msg">
>> --<br class="gmail_msg">
>><br class="gmail_msg">
>> Damien Gardner Jnr<br class="gmail_msg">
>> VK2TDG. Dip EE. GradIEAust<br class="gmail_msg">
>> <a href="mailto:rendrag@rendrag.net" class="gmail_msg" target="_blank">rendrag@rendrag.net</a> - <a href="http://www.rendrag.net/" rel="noreferrer" class="gmail_msg" target="_blank">http://www.rendrag.net/</a><br class="gmail_msg">
>> --<br class="gmail_msg">
>> We rode on the winds of the rising storm,<br class="gmail_msg">
>> We ran to the sounds of thunder.<br class="gmail_msg">
>> We danced among the lightning bolts,<br class="gmail_msg">
>> and tore the world asunder<br class="gmail_msg">
>><br class="gmail_msg">
>><br class="gmail_msg">
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