One From The Road Comments http://www.onefromtheroad.com Tools, Toys, and Tales for the Theatrical Technician en Mon, 06 Oct 2008 16:02:49 +0000 http://wordpress.org/?v=1.2.2 by: bigsean http://www.onefromtheroad.com/index.php?p=74#comments Thu, 04 Sep 2008 21:04:21 -0700 874:74@http://www.onefromtheroad.com hey hey hey. glad to see my invention is being passed on to people who need the stability of a pedal/pedalboard that doesn’t go tits up during a show or live tv broadcast.. boing boing hey hey hey. glad to see my invention is being passed on to people who need the stability of a pedal/pedalboard that doesn’t go tits up during a show or live tv broadcast.. boing boing

]]> by: Andy http://www.onefromtheroad.com/index.php?p=29#comments Tue, 18 Mar 2008 14:42:00 -0700 865:29@http://www.onefromtheroad.com Nice detective work! If it’s alright with you, I’d like to post that as its own tip later this week, since I’m sure somebody else will run into that problem, too. –Andy Nice detective work! If it’s alright with you, I’d like to post that as its own tip later this week, since I’m sure somebody else will run into that problem, too.

–Andy

]]> by: JimE http://www.onefromtheroad.com/index.php?p=29#comments Tue, 18 Mar 2008 13:53:35 -0700 864:29@http://www.onefromtheroad.com Hi Andy. So I finally had a chance to test some things. I did find one cable that had slipped into my arsenal without being checked that had pin 1 to shell. However, that didn’t solve the problem. The mixer didn’t show a connection to chassis ground either. I did notice, though, that with the intercom disconnected from the mixer, the call button on the mixer still lights it’s call light. This made me think that the mixer intercom circuit must be powered internally and perhaps didn’t need the power from the intercom supply. So I took an old mic cable, cut the pin 2 connection and used it to connect to the mixer. Problem solved. No more buzz, call lights and talk work properly. Go figure. Thanks for you help. Hi Andy. So I finally had a chance to test some things. I did find one cable that had slipped into my arsenal without being checked that had pin 1 to shell. However, that didn’t solve the problem. The mixer didn’t show a connection to chassis ground either.

I did notice, though, that with the intercom disconnected from the mixer, the call button on the mixer still lights it’s call light. This made me think that the mixer intercom circuit must be powered internally and perhaps didn’t need the power from the intercom supply. So I took an old mic cable, cut the pin 2 connection and used it to connect to the mixer. Problem solved. No more buzz, call lights and talk work properly. Go figure.

Thanks for you help.

]]> by: Andy http://www.onefromtheroad.com/index.php?p=29#comments Fri, 14 Mar 2008 18:15:01 -0700 863:29@http://www.onefromtheroad.com Hey Jim, Hmm…the first thing I’d check would be to open up the connectors on the cables you’re using and make sure there’s no jumper soldered between pin 1 and the shell contact. That’s an easy thing to overlook, since it’s entirely possible that every cable in the venue could be (improperly) wired that way, so swapping cables doesn’t necessarily eliminate that. Another possibility would be that the same pin 1 to chassis short (aka “The Pin 1 Problem") is present in the intercom connector on the console. I can only find a block diagram of the console, and not a schematic, so I can’t tell from their documentation. It’d be worth taking a meter with a continuity buzzer in it to check for continuity between the chassis of the console and pin 1 of the intercom connector. Let me know if either one of those is a winner, otherwise I’ll see if I can think of anybody else or point you in the right direction to find the answer! -Andy Hey Jim, Hmm…the first thing I’d check would be to open up the connectors on the cables you’re using and make sure there’s no jumper soldered between pin 1 and the shell contact. That’s an easy thing to overlook, since it’s entirely possible that every cable in the venue could be (improperly) wired that way, so swapping cables doesn’t necessarily eliminate that.

Another possibility would be that the same pin 1 to chassis short (aka “The Pin 1 Problem") is present in the intercom connector on the console. I can only find a block diagram of the console, and not a schematic, so I can’t tell from their documentation. It’d be worth taking a meter with a continuity buzzer in it to check for continuity between the chassis of the console and pin 1 of the intercom connector.

Let me know if either one of those is a winner, otherwise I’ll see if I can think of anybody else or point you in the right direction to find the answer!

-Andy

]]> by: JimE http://www.onefromtheroad.com/index.php?p=29#comments Fri, 14 Mar 2008 14:26:55 -0700 862:29@http://www.onefromtheroad.com Very helpful article. When I try to connect my Clearcom system to the intercom connection on my Allen and Heath ML4000 (allegedly Clearcom compatible) it begins to buzz so badly that it’s unusable. Would that likely indicate improper grounding inside the mixer? I’ve tried a few different cables with no change. Very helpful article. When I try to connect my Clearcom system to the intercom connection on my Allen and Heath ML4000 (allegedly Clearcom compatible) it begins to buzz so badly that it’s unusable. Would that likely indicate improper grounding inside the mixer? I’ve tried a few different cables with no change.

]]> by: Andy http://www.onefromtheroad.com/index.php?p=29#comments Wed, 12 Mar 2008 21:56:22 -0700 861:29@http://www.onefromtheroad.com Further thoughts, call light on with a ClearCom wired system means you’re getting some sort of voltage on the audio line, or a short between pins 2 and 3. Generally means something’s not interfaced correctly, just to get more specific on what’s miswired/mispatched/broken/missing, I’d need to know what kind of wireless system you’ve got :-) Further thoughts, call light on with a ClearCom wired system means you’re getting some sort of voltage on the audio line, or a short between pins 2 and 3. Generally means something’s not interfaced correctly, just to get more specific on what’s miswired/mispatched/broken/missing, I’d need to know what kind of wireless system you’ve got :-)

]]> by: Andy http://www.onefromtheroad.com/index.php?p=29#comments Wed, 12 Mar 2008 21:54:19 -0700 860:29@http://www.onefromtheroad.com What brands/models of wireless and wired systems? What brands/models of wireless and wired systems?

]]> by: Joey Ferri http://www.onefromtheroad.com/index.php?p=29#comments Wed, 12 Mar 2008 21:52:26 -0700 859:29@http://www.onefromtheroad.com More of a question. With a wireless com system connected to a wired com system we get a bad buzz, and call light eternally on. Seems i read about this somewhere, but can’t find the info now… More of a question. With a wireless com system connected to a wired com system we get a bad buzz, and call light eternally on. Seems i read about this somewhere, but can’t find the info now…

]]> by: Andy http://www.onefromtheroad.com/index.php?p=156#comments Thu, 06 Mar 2008 21:14:41 -0800 858:156@http://www.onefromtheroad.com There was some sort of glitch at CB, but it’s been restored, along with a few other posts that went MIA. At least one reply from this morning is still missing, but the rest of the thread is there. Silly computers… There was some sort of glitch at CB, but it’s been restored, along with a few other posts that went MIA. At least one reply from this morning is still missing, but the rest of the thread is there. Silly computers…

]]> by: Andy http://www.onefromtheroad.com/index.php?p=156#comments Thu, 06 Mar 2008 20:41:32 -0800 857:156@http://www.onefromtheroad.com Nope, at some point today, the post disappeared. I’m working on sorting out what happened, if another senior team member deleted it by accident, or what. More to follow… Nope, at some point today, the post disappeared. I’m working on sorting out what happened, if another senior team member deleted it by accident, or what. More to follow…

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