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Re: Valcom Speaker #12662 08/30/06 02:29 PM
Joined: Jan 2005 Posts: 15,390 Likes: 14 Fayetteville, NC EV607797 Moderator-Vertical, Vodavi, 1A2, Outside Wire
EV607797 Moderator-Vertical, Vodavi, 1A2, Outside Wire Joined: Jan 2005 Posts: 15,390 Likes: 14 Fayetteville, NC	This is most likely a ground on the tip or ring of the audio pair. The fact that it's intermittent is that whatever it is, whether a nicked cable, sloppy stripping of conductors on the speaker terminals, or an intermittent open in the tip or ring means that you have your hands full. An intermittent open will cause a huge hum. This happens when people are looping cables from speaker to speaker and twist the stripped ends together before placing them under the screw terminals. When the screw is tightened, one of the wires might be broken but is still close-enough in contact where it is usually good. Ed Vaughn, MBSWWYPBX

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Re: Valcom Speaker #12663 08/30/06 02:48 PM
Joined: Feb 2005 Posts: 12,348 Likes: 4 New York hbiss Member
hbiss Member Joined: Feb 2005 Posts: 12,348 Likes: 4 New York	I'm with Ed on this. It has to be a speaker wiring problem. How many speakers are we talking about? Start replacing the wiring unless you can isolate it. -Hal CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.

Re: Valcom Speaker #12664 08/30/06 03:00 PM
Joined: Jul 2003 Posts: 6,768 Mt. Sidney, Va. CMDL_GUY Member
CMDL_GUY Member Joined: Jul 2003 Posts: 6,768 Mt. Sidney, Va.	After rereading your 1st post I have to say in order for it to be caused by the x-ray, the x-ray would have to be off for that ten day period. If the x-ray was used during that time then I also have to agree with Ed.

Re: Valcom Speaker #12665 08/30/06 03:20 PM
Joined: Jan 2004 Posts: 6,648 Sarasota FL skip555 RIP Moderator-Nisuko-Tie, General
skip555 RIP Moderator-Nisuko-Tie, General Joined: Jan 2004 Posts: 6,648 Sarasota FL	is it in a office complex ? could be something in another office causing it . can you get acsess late at nite or on weekend ? Skip ------------------------------------ Serving SW and West central Fl since 1984

Re: Valcom Speaker #12666 08/30/06 03:29 PM
Joined: Aug 2002 Posts: 4,931 Likes: 1 Lakeland,Florida,USA SSPhone Administrator
SSPhone Administrator Joined: Aug 2002 Posts: 4,931 Likes: 1 Lakeland,Florida,USA	Since everyone else is guessing, my guess is 1 bad speaker ruining the whole bunch. Telrad Digital Programmer Kits Toshiba Voicemail Network Programmer Kits TeamViewer Remote Support BUY Remote Support

Re: Valcom Speaker #12667 08/30/06 11:37 PM
Joined: Jan 2002 Posts: 2,328 Harlingen, TX jwooten Moderator-Comdial
jwooten Moderator-Comdial Joined: Jan 2002 Posts: 2,328 Harlingen, TX	People often overlook the AC side of the equation. Others here have already mentioned the AC side. Noise induced on the AC side will travel to the DC side. Install a good ups to eliminate this possibility.

Re: Valcom Speaker #12668 08/30/06 11:53 PM
Joined: Jul 2005 Posts: 1,184 Ontario, Canada twisted pair Member
twisted pair Member Joined: Jul 2005 Posts: 1,184 Ontario, Canada	Could be a current problem/overheating power supply. Most Valcom powered speakers require about 250mA each. Check the size of the supply and the number of units on each supply.

Re: Valcom Speaker #12669 08/31/06 12:42 AM
Joined: Jun 2006 Posts: 512 Pa. jacktel Member
jacktel Member Joined: Jun 2006 Posts: 512 Pa.	We have a valcom system installed that is picking up ticking from alarm system wire. If i use my Progressive amp probe almost anywhere above ceiling tiles i hear it. Have to go back and replace wire with shielded,I should have looked first.-----------John

Re: Valcom Speaker #12670 08/31/06 12:43 AM
Joined: Sep 2004 Posts: 1,436 Sallisaw, OK USA junkman Member
junkman Member Joined: Sep 2004 Posts: 1,436 Sallisaw, OK USA	Something else that hasn't been mentioned is radio interference. Also, can you describe the noise? Is it a tone or a buzz, high or low pitch, constant or varying, always the same length? Joe --- No trees were harmed as a result of this posting; however, many electrons were severely inconvenienced.

Re: Valcom Speaker #12671 08/31/06 02:57 AM
Joined: May 2003 Posts: 2,267 Windham, Maine, USA paul144 Member
paul144 Member Joined: May 2003 Posts: 2,267 Windham, Maine, USA	Was one doctor away for a part of that 10days test period? I can think of several pieces of equipment that might be found in a doctor's office that would cause it, from an x-ray machine as noted above, an electric cauterizer, electroloys machine, add in paper shredder, photocopier, etc...