Today's Message Index:
----------------------
1. 09:50 AM - Re: headsets (taildrags)
2. 04:12 PM - Re: Re: headsets (Ray Krause)
3. 08:01 PM - Re: headsets (taildrags)
4. 08:27 PM - Re: Re: headsets (Ray Krause)
5. 08:44 PM - Re: Re: headsets (Ned Lebens)
Message 1
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Okay, so I may have a new best friend on this list (Ned, who gave me the idea to
try this). I picked up a few bits at Radio Shack and cobbled up a little impedance
matching setup to try with my headset. Pay no attention to the materials
or workmanship... this is just a test. But wowza-! Yes indeed, it does boost
the volume through the receivers! So it worked while sitting at my back
patio waiting for the soldering pencil to cool off and it worked well enough that
I had to crank the volume down a couple of notches. I hope to go flying today
and see how it works in the air. News at 10... picture of the little homebrew
box attached.
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=424121#424121
Attachments:
http://forums.matronics.com//files/img_3116_117.jpg
Message 2
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How about a schematic si I can build one?
Thanks,
Ray Krause
Sent from my iPad
> On May 31, 2014, at 9:50 AM, "taildrags" <taildrags@hotmail.com> wrote:
>
>
> Okay, so I may have a new best friend on this list (Ned, who gave me the idea
to try this). I picked up a few bits at Radio Shack and cobbled up a little
impedance matching setup to try with my headset. Pay no attention to the materials
or workmanship... this is just a test. But wowza-! Yes indeed, it does
boost the volume through the receivers! So it worked while sitting at my back
patio waiting for the soldering pencil to cool off and it worked well enough
that I had to crank the volume down a couple of notches. I hope to go flying
today and see how it works in the air. News at 10... picture of the little homebrew
box attached.
>
> --------
> Oscar Zuniga
> Medford, OR
> Air Camper NX41CC "Scout"
> A75 power
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=424121#424121
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/img_3116_117.jpg
>
>
>
>
>
>
>
Message 3
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Ray; there's really nothing to it, but I'll sketch up a schematic and post it.
After giving it a little more thought, maybe instead of dismantling this ugly
duckling impedance matcher, I'll mail it to anybody who is curious to try it
out on their headset if you're using a handheld. It's less than $10 worth of
Radio Shack parts, although the factory-made units are over $130. If you're using
a panel-mount com, it's likely that the radio is already looking for the
higher impedance of a headset and you don't need to do anything, but apparently
handhelds and portable equipment use lower impedance audio output. I'm really
curious to see if Mike Cuy's headset picks up some volume with it. Ray, if
you'd like to try it out just send me your postal address and I'll mail it to
you to play with. Find a continuously broadcasting station like ATIS, put on
your headset as usual, note the headset volume, and then insert the matcher
between your radio and headset to see if the volume increases.
I flew with the setup today and I could hear Tower perfectly without leaning forward
behind the windscreen or backing off the throttle! It's obvious that it
needs shielded wiring and needs to be enclosed because I hadn't had any problem
with ATC hearing me before, but now they say I'm scratchy and weak and the
only thing that changed was me inserting the impedance matcher in line with the
headset so it must be letting ignition noise or other interference in. I'll
fabricate a proper one now, and see if the interference goes away if I use shielded
wiring and an enclosed metal box for it.
Ned: thanks again!
--------
Oscar Zuniga
Medford, OR
Air Camper NX41CC "Scout"
A75 power
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=424135#424135
Message 4
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Oscar,
You are a great guy! Thanks for such a generous offer. I will try my various headsets
with my hand held in the next few days and see if there is any differences
among them. Then, when I get the Aeronca back from its annual, I will try
all that stuff in the plane. Nothing seems to work with the radio in the Aeronca!
But my Clarity Aloft in-the-ear headset works great in the Aeronca with just
the intercom. When the radio is in the loop, it is terrible.
I just made a set of shielded ignition wires for the Aeronca by placing a piece
of mesh shield covering (from ACS) over each wire, then covering it with heat
shrink. The shielding is then grounded on the magneto end to the magneto. I
will still be using the same non- shielded plugs (trying to stay as original as
possible, at least original looking!). If this does not eliminate the ignition
noise, I will go to an ACS shielded harness and shielded plugs. Whichever system
works, I will use on the A-65 in my SkyScout when it is done.
If all this fails, I will ask to barrow your "gender mender". And "Thanks, Ned"!
I will be in contact. Hope you make it to Frazier Lake next Saturday.
Thanks,
Ray
Sent from my iPad
> On May 31, 2014, at 8:00 PM, "taildrags" <taildrags@hotmail.com> wrote:
>
>
> Ray; there's really nothing to it, but I'll sketch up a schematic and post it.
After giving it a little more thought, maybe instead of dismantling this ugly
duckling impedance matcher, I'll mail it to anybody who is curious to try it
out on their headset if you're using a handheld. It's less than $10 worth of
Radio Shack parts, although the factory-made units are over $130. If you're
using a panel-mount com, it's likely that the radio is already looking for the
higher impedance of a headset and you don't need to do anything, but apparently
handhelds and portable equipment use lower impedance audio output. I'm really
curious to see if Mike Cuy's headset picks up some volume with it. Ray,
if you'd like to try it out just send me your postal address and I'll mail it
to you to play with. Find a continuously broadcasting station like ATIS, put
on your headset as usual, note the headset volume, and then insert the matcher
between your radio and headset to see if the volume !
> increases.
>
> I flew with the setup today and I could hear Tower perfectly without leaning
forward behind the windscreen or backing off the throttle! It's obvious that
it needs shielded wiring and needs to be enclosed because I hadn't had any problem
with ATC hearing me before, but now they say I'm scratchy and weak and the
only thing that changed was me inserting the impedance matcher in line with
the headset so it must be letting ignition noise or other interference in. I'll
fabricate a proper one now, and see if the interference goes away if I use
shielded wiring and an enclosed metal box for it.
>
> Ned: thanks again!
>
> --------
> Oscar Zuniga
> Medford, OR
> Air Camper NX41CC "Scout"
> A75 power
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=424135#424135
>
>
>
>
>
>
>
>
>
>
Message 5
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Hello Oscar,
Very glad to hear that it is working for you. The noise issue might be
tougher to fix, but hopefully the shielding will do it. I'm sure you'll
let us know. I've sketched up a schematic for Ray - it should be attached.
Ned
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