Today's Message Index:
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1. 09:00 AM - Audio panel #inputs vs #sources (Ralph E. Capen)
2. 10:59 AM - Strobe discharge pop-pop-pop (Ralph E. Capen)
3. 08:26 PM - Re: Audio panel #inputs vs #sources (Charles Reiche)
Message 1
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| Subject: | Audio panel #inputs vs #sources |
Folks,
I have three inputs that should be 'unswitched':
AOA warning
Traffic Alert
AF3400EM Engine monitor
My audio panel (PS Engineering PMA7000MS) has two unswitched inputs.
Can I tie two of the sources to one input? I think there would only be an issue
if they both went off at teh same time.
Alternatively, I can put the third to a switched input and leave the switch on.
Thanks,
Ralph
Message 2
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| Subject: | Strobe discharge pop-pop-pop |
I'm doing some system testing and I can hear a very slight pop each time my strobes
discharge through my headset. It doesn't break the squelch or prevent me
from hearing the radios - or stereo for that matter. No whining on the charge
cycles and I gotta listen carefully to catch the pop - but it's there.
Is this strictly due to the high-voltage discharge in a 12V system? Is there something
I can due to get rid of this? Or should I take gladness that it's faint,
doesn't interfere, it's as good as it gets, have a coke and a smile and.......?
Ralph
Message 3
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| Subject: | Re: Audio panel #inputs vs #sources |
Put a 510 ohm resistor inline with each input before it gets to the back of
the audio panel on the ones you will be paralelling together.
device 1 - 510 ohm- \
-------unswitched input
device 2 - 510 ohm- /
the resistors protect the other device's audio amp.
Good luck
Charles
----- Original Message -----
From: "Ralph E. Capen" <recapen@earthlink.net>
<aeroelectric-list@matronics.com>
Sent: Wednesday, January 09, 2008 11:16 AM
Subject: Avionics-List: Audio panel #inputs vs #sources
> <recapen@earthlink.net>
>
> Folks,
>
> I have three inputs that should be 'unswitched':
> AOA warning
> Traffic Alert
> AF3400EM Engine monitor
>
> My audio panel (PS Engineering PMA7000MS) has two unswitched inputs.
> Can I tie two of the sources to one input? I think there would only be an
> issue if they both went off at teh same time.
> Alternatively, I can put the third to a switched input and leave the
> switch on.
>
> Thanks,
> Ralph
>
>
>
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