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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => LAB: The Classic Live Audio Board => Topic started by: Edward Gonzalez on April 01, 2014, 11:14:50 AM

Title: Mixer Intercom/Interface
Post by: Edward Gonzalez on April 01, 2014, 11:14:50 AM
I am looking for a device where I can take the headset output of my com belt pack plug into the device take the output plug into my headset and feed from my console cue. What I want to is to able to listen to com and be able to cue inputs on my desk at the same time. I found AD-MIX1 that was made by Production Intercom it's been discontinued and they went out of business. Any one else make something like AD-MIX1? Does any one have a schematics or plans?
Thanks
Title: Re: Mixer Intercom/Interface
Post by: Tim McCulloch on April 01, 2014, 12:11:01 PM
I am looking for a device where I can take the headset output of my com belt pack plug into the device take the output plug into my headset and feed from my console cue. What I want to is to able to listen to com and be able to cue inputs on my desk at the same time. I found AD-MIX1 that was made by Production Intercom it's been discontinued and they went out of business. Any one else make something like AD-MIX1? Does any one have a schematics or plans?
Thanks

Production Intercom is back in business, the founder's daughter is running the firm and has posted here recently. Give them a phone call and see if they have an AD-MIX sitting on a shelf or if there are plans to bring it back.
Title: Re: Mixer Intercom/Interface
Post by: Edward Gonzalez on April 01, 2014, 12:39:01 PM
Production Intercom is back in business, the founder's daughter is running the firm and has posted here recently. Give them a phone call and see if they have an AD-MIX sitting on a shelf or if there are plans to bring it back.

Thanks
Called them they don't make it and are not planing to make it.
Title: Re: Mixer Intercom/Interface
Post by: Tim McCulloch on April 01, 2014, 12:44:02 PM
Thanks
Called them they don't make it and are not planing to make it.

Pete Erskin provides lots of intercom DIY projects:  http://bestaudio.com/downloads.htm  Check the rest of the site to get an idea of the events Pete works on...

I expect he or Mac Kerr will see this and contribute, too.
Title: Re: Mixer Intercom/Interface
Post by: Chris Johnson [UK] on April 01, 2014, 03:38:08 PM
I'm not sure what console your using, but you can often add an external input into the cue mix using the console (either as a designed-in option, or with some cleverness).

Otherwise, get an appropriate 2w-4w converter for your comms system, and use one of these: http://fischer-amps.de/en/in-ear-monitoring/new-in-ear-body-pack-xl/browse/1/artikel/-fb213c375b/index.php/inear-monitoring-hardware.html

Put the cue out from your console in here stereo, and then use the additional mono input for the comms. Voila. Pretty cheap too.

EDIT: Fischer do a rackmount mains-powered variant too if you'd rather that.

Title: Re: Mixer Intercom/Interface
Post by: Ed Spoto on April 01, 2014, 04:59:16 PM
I am looking for a device where I can take the headset output of my com belt pack plug into the device take the output plug into my headset and feed from my console cue. What I want to is to able to listen to com and be able to cue inputs on my desk at the same time. I found AD-MIX1 that was made by Production Intercom it's been discontinued and they went out of business. Any one else make something like AD-MIX1? Does any one have a schematics or plans?
Thanks
I use this http://www.audiomanproducts.com/ISO-Box-1-5-Items-ISO-Box-1-5-Items.htm patched into a console input to monitor Coms.
Title: Re: Mixer Intercom/Interface
Post by: Edward Gonzalez on April 01, 2014, 05:24:50 PM
I'm not sure what console your using, but you can often add an external input into the cue mix using the console (either as a designed-in option, or with some cleverness).

Otherwise, get an appropriate 2w-4w converter for your comms system, and use one of these: http://fischer-amps.de/en/in-ear-monitoring/new-in-ear-body-pack-xl/browse/1/artikel/-fb213c375b/index.php/inear-monitoring-hardware.html

Put the cue out from your console in here stereo, and then use the additional mono input for the comms. Voila. Pretty cheap too.

My issue is that I use different types of com systems in needs to com off the belt back headset output.
EDIT: Fischer do a rackmount mains-powered variant too if you'd rather that.
Title: Re: Mixer Intercom/Interface
Post by: Edward Gonzalez on April 01, 2014, 05:26:33 PM
I use this http://www.audiomanproducts.com/ISO-Box-1-5-Items-ISO-Box-1-5-Items.htm patched into a console input to monitor Coms.
I own those
Thanks
Title: Re: Mixer Intercom/Interface
Post by: brian frost on April 02, 2014, 10:48:53 AM
I use this http://www.audiomanproducts.com/ISO-Box-1-5-Items-ISO-Box-1-5-Items.htm patched into a console input to monitor Coms.

That's pretty cool.  So i can take the end of a chain of a com line, put this in line -> into console -> cue this in my headphones & then in theory have a mic going out of the desk back into another one of these & into the com system and eliminate a com headset?

that's pretty sweet.
Title: Re: Mixer Intercom/Interface
Post by: Andrew Broughton on April 02, 2014, 10:55:49 AM

That's pretty cool.  So i can take the end of a chain of a com line, put this in line -> into console -> cue this in my headphones & then in theory have a mic going out of the desk back into another one of these & into the com system and eliminate a com headset?

that's pretty sweet.
No nulling or side tone adjustment though.
Title: Re: Mixer Intercom/Interface
Post by: John J Saunders on April 02, 2014, 12:50:31 PM
I have a studio technologies dual 2w-4w box installed in my audio rack and really like it.  They make a half rack one as well.

http://www.studio-tech.com/product_m46.html
Title: Re: Mixer Intercom/Interface
Post by: Josh Hana on April 02, 2014, 01:02:10 PM
I use this http://www.audiomanproducts.com/ISO-Box-1-5-Items-ISO-Box-1-5-Items.htm patched into a console input to monitor Coms.

So would a regular IL-19 in line after the last beltpack work going into a console?
Title: Re: Mixer Intercom/Interface
Post by: Tim McCulloch on April 02, 2014, 01:07:32 PM
So would a regular IL-19 in line after the last beltpack work going into a console?

It depends on how Pin 1 is handled.  Some transformers will make Clear-Com's call light stay on.
Title: Re: Mixer Intercom/Interface
Post by: John Sulek on April 02, 2014, 05:11:42 PM
So would a regular IL-19 in line after the last beltpack work going into a console?
It will cause all the call lights on clearcomm 2w circuits to stay on as there is now a short between pins 2 and 3.
Mr Erskine's "Buzzbuster" and the Audioman iso box have a seperate transformer from pin 1 to pins 2 and 3.
Title: Re: Mixer Intercom/Interface
Post by: brian maddox on April 02, 2014, 05:11:55 PM
this response isn't gonna really help, but i thought i'd share anyway.

Many years ago i came across a ClearCom belt pack made back in the 70's.  for us old-timers, picture the belt packs that were all metal but not the silver ones.  the blue and white ones.  As i recall, the model number of this was RS-202a or something like it.  if i get a chance to shoot a pic of it i'll post it.

Anyway, this version of that belt pack had two channels of ClearCom input [on 3 pin xor] and two channels of line input [also on 3 pin XLR].  there were only three total xlr inputs as the center one was shared as the second line input and/or the second clear com input.  On the top of the pack were two concentric volume knobs for the 4 channels of inputs and two toggle switches to turn on/off the the mic to the two ClearCom channels.  No call light but no biggee...

This thing was brilliant.  i simply plugged one Com channel in for production com, one Com channel for PL to my A2, and plugged the cue in from my console to one of the line inputs.  all powered off the first Com channel.  brilliant.

My first one of these got stolen along with all the rest of my briefcase contents in the late 90's, but i trolled eBay for about 2 years and found two more that i snatched up and still use to this day.

It's such a brilliant box, but apparently ClearCom only made a handful of them as they are wicked hard to fine.  i have yet to see anyone make anything like it since....
Title: Re: Mixer Intercom/Interface
Post by: Pete Erskine on April 02, 2014, 05:30:16 PM
So would a regular IL-19 in line after the last beltpack work going into a console?


Comm is an unbalanced circuit - For Clearcom, Pin 1 is ground, Pin 2 is power and Pin 3 is the intercom unbalanced line.  An intercom transformer like the Audioman (http://steve1mac.blogspot.com/search/label/AudioMan%20ISO%20Box) has separate transformers for pin 3 and for pin 2 if you are using it with RTS or Clearcom TW intercom.  Using it to insert and extract audio from the comms will not work as well as the Studio Technologies Audio only box  Model 72 (http://studiotechnologies.com/product_m72.html) is one way to go - as described above.  Still no sidetone or nulling.


Title: Re: Mixer Intercom/Interface
Post by: Pete Erskine on April 02, 2014, 07:04:07 PM
Pete Erskine provides lots of intercom DIY projects:  http://bestaudio.com/downloads.htm  Check the rest of the site to get an idea of the events Pete works on...

I expect he or Mac Kerr will see this and contribute, too.


Here is how I would do it and it is listed in my downloads section as well.
Title: Re: Mixer Intercom/Interface
Post by: Chris Johnson [UK] on April 03, 2014, 04:03:07 PM
As an aside, what program are you drawing your schematics in?
Title: Re: Mixer Intercom/Interface
Post by: Pete Erskine on April 03, 2014, 04:12:06 PM
As an aside, what program are you drawing your schematics in?

Microsoft Visio