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Author Topic: 2W (clearcom) to balanced line in/out circuit  (Read 614 times)

Erik Jerde

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2W (clearcom) to balanced line in/out circuit
« on: April 10, 2019, 09:31:11 pm »

I've got a couple Green-Go Interface-X that I use for interfacing with camera CCUs.  It's a 3 port interface with 2 4W interfaces and 1 2W interface.  I use the 4W ports with the CCUs and I'd like to use the 2W ports to get other signals in/out of the comms system.  I'm wondering if anyone can point me to a schematic that can convert 2W to a balanced (or just line level) in/out.  Passive would be fantastic if possible.

Thanks!
~Erik
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Mac Kerr

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Re: 2W (clearcom) to balanced line in/out circuit
« Reply #1 on: April 10, 2019, 09:57:10 pm »

I'm wondering if anyone can point me to a schematic that can convert 2W to a balanced (or just line level) in/out.  Passive would be fantastic if possible.

Thanks!
~Erik

For all things intercom related go to Pete Erskine's website, www.bestaudio.com. You will have to register, but pretty much everything you need is there.

Mac
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Jordan Wolf

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Re: 2W (clearcom) to balanced line in/out circuit
« Reply #2 on: April 11, 2019, 07:17:11 am »

AVLifesavers has some nifty little boxes pre-made, if that is “better” for you.

I totally get wanting to build your own box, though.
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Erik Jerde

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Re: 2W (clearcom) to balanced line in/out circuit
« Reply #3 on: April 11, 2019, 03:32:35 pm »

For all things intercom related go to Pete Erskine's website, www.bestaudio.com. You will have to register, but pretty much everything you need is there.

Mac

I've looked through Pete's site a few times.  There's some theory stuff there but I haven't found an actual schematic for what I'm trying to do.  Maybe I'm missing it and need a pointer.

AVLifesavers has some nifty little boxes pre-made, if that is “better” for you.

I totally get wanting to build your own box, though.

I'll check it out, thanks Jordan.  Still would love to have a schematic though. 
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Mac Kerr

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Re: 2W (clearcom) to balanced line in/out circuit
« Reply #4 on: April 11, 2019, 04:11:55 pm »

I've looked through Pete's site a few times.  There's some theory stuff there but I haven't found an actual schematic for what I'm trying to do.  Maybe I'm missing it and need a pointer.

If you want to turn your 2W interface into a full 4W interface you need a hybrid. If you want to either inject audio or pick audio off from the 2W interface you can use the audio only adapter which is shown in a schematic on Pete's site. I can't link to it because you need to log in to get to it, but I just looked, and it is there. Go to the downloads tab and it is on the first page if you scroll down to "Comm Adapters and Isolators".

If you need a single channel 2W to 4W adapter that can send and receive simultaneously you can build out from the 4 pin headset jack of a beltpack. The adapter could be used with a spare pack from whatever system you need to interface to.

Mac
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Jason Glass

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Re: 2W (clearcom) to balanced line in/out circuit
« Reply #5 on: April 11, 2019, 04:15:45 pm »

I've got a couple Green-Go Interface-X that I use for interfacing with camera CCUs.  It's a 3 port interface with 2 4W interfaces and 1 2W interface.  I use the 4W ports with the CCUs and I'd like to use the 2W ports to get other signals in/out of the comms system.  I'm wondering if anyone can point me to a schematic that can convert 2W to a balanced (or just line level) in/out.  Passive would be fantastic if possible.

Thanks!
~Erik

Interface block diagram:

https://studio-tech.com/wp-content/uploads/2018/04/bd_m47_a.pdf

Not as simple as one might assume.

Pete Erskine

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Re: 2W (clearcom) to balanced line in/out circuit
« Reply #6 on: April 12, 2019, 11:46:35 am »

I've got a couple Green-Go Interface-X that I use for interfacing with camera CCUs.  It's a 3 port interface with 2 4W interfaces and 1 2W interface.  I use the 4W ports with the CCUs and I'd like to use the 2W ports to get other signals in/out of the comms system.  I'm wondering if anyone can point me to a schematic that can convert 2W to a balanced (or just line level) in/out.  Passive would be fantastic if possible.

Thanks!
~Erik

http://www.bestaudio.com/s/Audio_only_adapter.pdf
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Re: 2W (clearcom) to balanced line in/out circuit
« Reply #6 on: April 12, 2019, 11:46:35 am »


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