Today's Message Index:
----------------------
0. 07:59 AM - Just A Few Days Left... (Matt Dralle)
1. 09:36 AM - Audio Isolation Amplifier Boards (nuckollsr)
2. 01:11 PM - Re: Audio Isolation Amplifier Boards (Art Zemon)
3. 01:44 PM - source for nice crimp splices (Charlie England)
4. 02:58 PM - Re: Audio Isolation Amplifier Boards (Charlie England)
5. 06:20 PM - Re: Audio Isolation Amplifier Boards (Sebastien)
6. 07:52 PM - Re: Audio Isolation Amplifier Boards (Jared Yates)
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Subject: | Just A Few Days Left... |
Dear Listers,
There are just a few days left for this year's List Fund Raiser. If you've been
putting off making a Contribution until the last minute, well, this is it!
The last minute, that is... :-) There are some GREAT new gift selections to choose
from this year. I personally want at least three of them! There's probably
something you can't live without too! And, best of all it supports your
Lists!
Please remember that there isn't any sort of commercial advertising on the Lists
and the *only* means of keeping these Lists running is through your Contributions
during this Fund Raiser. Let's make this a "Black Friday" for the Lists!
Please make a Contribution today!
http://www.matronics.com/contribution
Or, drop a personal check in the mail to:
Matt Dralle / Matronics
581 Jeannie Way
Livermore CA 94550
Thank you!
Matt Dralle
Matronics Email List Administrator
Message 1
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Subject: | Audio Isolation Amplifier Boards |
I've had some requests for the bare etched circuit board called out in the DIY amplifier project featured at http://tinyurl.com/hn28p2q
Unfortunately, there is a minimum quantity for fabricating these. If I could sell
three more boards at $25 each postage paid, I would be wiling to bring another
batch of these in house.
This was probably the most successful DIY project on the AeroElectric website.
I think we sold about 80 of those boards over the years.
Bob . . .
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=463182#463182
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Subject: | Re: Audio Isolation Amplifier Boards |
I'm dim. What is an Audio Isolation Amplifier used for? Which is oblique
way of asking, do I need one for my plane?
-- Art Z.
--
https://CheerfulCurmudgeon.com/
*"If I am not for myself, who is for me? And if I am only for myself, what
am I? And if not now, when?" Hillel*
Message 3
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Subject: | source for nice crimp splices |
A friend found some of these in a purchased RV-8 project. They seem to be
really nice crimps. Very compact, and apparently come in singles, duals,
triples, etc. Obviously need a dedicated tool, but for splicing in a
bundle, they really reduce bulk.
Anyone have any idea where they came from?
Charlie
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Subject: | Re: Audio Isolation Amplifier Boards |
On 11/26/2016 12:58 PM, Art Zemon wrote:
> I'm dim. What is an Audio Isolation Amplifier used for? Which is
> oblique way of asking, do I need one for my plane?
>
> -- Art Z.
>
> --
> https://CheerfulCurmudgeon.com/
>
> /"If I am not for myself, who is for me? And if I am only for myself,
> what am I? And if not now, when?" Hillel/
Hi Art,
They can have two potential uses. If you open the .pdf file from Bob's
link, you'll see multiple sources listed that feed into one destination.
This is 'summing' function, that allows combining multiple audio sources
while maintaining isolation of the sources from each other. (If you just
tie them all together, some or all may not be able to maintain a high
enough level and/or have a clean signal. Like tying too many speakers in
parallel to your stereo, or worse, tying the left and right outputs
together.) With the isolation amp, you hear them all, but they don't
interfere with each other.
The second potential function (not implemented with the components
shown, but possible), is to supply 'gain', or amplification. Some signal
sources may not be loud enough to match up with other sources, or you
may need more volume in a loud cockpit than your radios or intercom can
supply. With a few tweaks to the circuit, it could supply amplification,
as well. (Verify with Bob that he's ok with doing this in this
particular circuit.)
Charlie
Message 5
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Subject: | Re: Audio Isolation Amplifier Boards |
I was wondering the same thing so I had a look at the .pdf. As far as I can t
ell it's a budget way of tying in several radios to your intercom without sp
ending thousands on an audio panel.
Sebastien
> On Nov 26, 2016, at 13:58, Art Zemon <art@zemon.name> wrote:
>
> I'm dim. What is an Audio Isolation Amplifier used for? Which is oblique w
ay of asking, do I need one for my plane?
>
> -- Art Z.
>
> --
> https://CheerfulCurmudgeon.com/
>
> "If I am not for myself, who is for me? And if I am only for myself, what a
m I? And if not now, when?" Hillel
Message 6
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Subject: | Re: Audio Isolation Amplifier Boards |
I use it to consolidate music, vhf nav audio, and dynon audio output into th
e single intercom input.
> On Nov 26, 2016, at 21:18, Sebastien <cluros@gmail.com> wrote:
>
> I was wondering the same thing so I had a look at the .pdf. As far as I ca
n tell it's a budget way of tying in several radios to your intercom without
spending thousands on an audio panel.
>
> Sebastien
>
>> On Nov 26, 2016, at 13:58, Art Zemon <art@zemon.name> wrote:
>>
>> I'm dim. What is an Audio Isolation Amplifier used for? Which is oblique w
ay of asking, do I need one for my plane?
>>
>> -- Art Z.
>>
>> --
>> https://CheerfulCurmudgeon.com/
>>
>> "If I am not for myself, who is for me? And if I am only for myself, what
am I? And if not now, when?" Hillel
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