Re: Strange Things that Happen!!!

[Bob La Londe <none@none.com99>]

On 9/24/2022 9:49 AM, ABLE1 wrote:
> Hey All,
>
> I don't know if anyone here (other than me) does work
> on School Sound PA System.  Recently I had to add
> six(6) Modular Class Room Speakers to the School System.
>
> Pulled the speaker cables (22/4 Shielded) from the office
> system to each of the classrooms.  This all happened before
> school started 4 weeks ago.  I was just informed that the
> one room M-105 there was noise of some kind on the Listen.
>
> If you don't know. When the Listen Button is pressed you can hear
> what the teacher is saying and then when you press the Talk
> Button the teacher can hear what you are saying.  Similar to
> a basic Intercom System.
>
> Well the sound is a Tikity Tikity Tikity in the background.
> To make a long story shorter.  I think I figured it out today
> that when I made a splice on the wires I left a 4-5" tail and
> beanie spliced each wire and then folded the wire inside a
> metal 4"x4" box with metal cover.  In the same closet there
> is a Security Panel, Fire Panel, and some IT Network Data
> Switching.  The Data Switch has a Cooling Fan and it is making
> a noise of sorts.
>
> What I ended up doing was to take some Tin Foil and wrapped up
> the spliced wires and stuffed it back into the box. I know it is
> early but the Tikity Tikity Tikity has gone away.
>
> At least to MY EARS!!
>
> I am thinking that the fan or something was putting out some RF Noise!!
> And the wire tails were picking it up and amplifying it to the office.
> Adding the Tin Foil has blocked the noise and hopefully fixed the issue.
>
> I will know more when staff gets in on Monday...................
>
> Hope you enjoyed the read!!!
>
> Les
>


So inclusion a tin foil may actually stop the voices.
--
Bob La Londe
CNC Molds N Stuff



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