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CardinalNSB(at)aol.com
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 Posted: Thu Jul 02, 2009 5:39 am Post subject: Living without an audio panel |
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I know this has been discussed before, please excuse, I am still confused
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longg(at)pjm.com
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| Posted: Thu Jul 02, 2009 6:41 am Post subject: Living without an audio panel |
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Skip,
Did you realize you can buy a Pilot brand 2-4 place intercom starting at $115.00? Why bother? Just for fun?
Glenn
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of CardinalNSB(at)aol.com
Sent: Thursday, July 02, 2009 9:28 AM
To: aeroelectric-list(at)matronics.com
Subject: AeroElectric-List: Living without an audio panel
I know this has been discussed before, please excuse, I am still confused.
My intercom will accept one monaural input.
I want to simply "twist" all the low level audio outputs together from the various boxes to the intercom (then solder or crimp). This will make the volume control on the box and its on-off switch the control for that unit.
What do I put in line between the intercom input and each box? resistor, diode, snapjack, or do I need a small isolation amplifier?
On switching the comm, I assume I need a 4pdt (on-on) to switch=====-mic, ptt, indicator light, and audio low so I don't get confused which comm I am listening to while transmitting?
Or is there a simple way to maybe add a resistor to the switch so that the non-transmitting comm is still on but with a reduced output?
Thank you, Skip Simpson
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nuckolls.bob(at)aeroelect
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| Posted: Thu Jul 02, 2009 6:46 am Post subject: Living without an audio panel |
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At 08:28 AM 7/2/2009, you wrote:
| Quote: | I know this has been discussed before, please excuse, I am still confused.
My intercom will accept one monaural input.
I want to simply "twist" all the low level audio outputs together from the various boxes to the intercom (then solder or crimp). This will make the volume control on the box and its on-off switch the control for that unit.
What do I put in line between the intercom input and each box? resistor, diode, snapjack, or do I need a small isolation amplifier? |
Try series resistors as passive mixing devices. This
will take some fiddling but it may get you by. This
is described in figure 18-4 and associated text of
the 'Connection.
Alternatively, consider a small mixing (audio iso)
amplifier. An exemplar DIY project is offered at
http://www.aeroelectric.com/DIY/Audio_Isolation_Amplifier.pdf
there's a number of off-the-self products out there
too. Somebody announced their new offerings here
on the List a few weeks ago.
I've had a number of requests for the ECB to
build an amplifier from scratch. I'm putting the
bare ECB back on the website catalog in a few
minutes.
| Quote: |
On switching the comm, I assume I need a 4pdt (on-on) to switch=====-mic, ptt, indicator light, and audio low so I don't get confused which comm I am listening to while transmitting?
Or is there a simple way to maybe add a resistor to the switch so that the non-transmitting comm is still on but with a reduced output? |
I don't know if that's available even in the super-whizzy
audio panels. It can be done but certainly calls for a
lot of development effort.
Bob . . .
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( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
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[quote][b]
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rv-9a-online(at)telus.net
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| Posted: Fri Jul 03, 2009 11:45 am Post subject: Living without an audio panel |
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Here's a link to Vx Aviation's web site: www.vx-aviation.com. We make the world's smallest audio panel, cable of handling 10 inputs and connecting to any radio or intercom system with or without auxiliary inputs. The biggest advantage is it's compact size and light weight. All of the circuitry is contained in a 25-pin connector backshell, including 4 channels with volume controls and six channels fixed level. The fixed level inputs are normally connected to instruments that have their own volume controls.
My direct contact is vx ""at"" vx-aviation.com.
Thanks,
Vern Little
Vx Aviation
[quote] ---
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rv-9a-online(at)telus.net
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| Posted: Fri Jul 03, 2009 11:45 am Post subject: Living without an audio panel |
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Here's a link to Vx Aviation's web site: www.vx-aviation.com. We make the world's smallest audio panel, cable of handling 10 inputs and connecting to any radio or intercom system with or without auxiliary inputs. The biggest advantage is it's compact size and light weight. All of the circuitry is contained in a 25-pin connector backshell, including 4 channels with volume controls and six channels fixed level. The fixed level inputs are normally connected to instruments that have their own volume controls.
My direct contact is vx ""at"" vx-aviation.com.
Thanks,
Vern Little
Vx Aviation
[quote] ---
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