Today's Message Index:
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1. 08:31 AM - Re: Static On GTN-650 (William Hunter)
2. 09:29 AM - Re: Static On GTN-650 (Robert L. Nuckolls, III)
3. 09:31 AM - Re: Static On GTN-650 (eschlanser)
4. 10:08 AM - Re: Static On GTN-650 (William Hunter)
5. 10:35 AM - Re: ****SPAM**** Re: Low voltage warning light (Peter Pengilly)
6. 10:52 AM - Re: Static On GTN-650 (Charlie England)
7. 03:07 PM - Re: Re: Low voltage warning light (DANIEL PELLETIER)
8. 07:43 PM - Re: Low voltage warning light (user9253)
Message 1
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| Subject: | Re: Static On GTN-650 |
>but the biggest fix was adding some noise filters to the lights.
Is there a filter available for purchase specific to this type of problem?
THANKS
Bill
On 12/17/2021 6:03 PM, Sebastien wrote:
> but the biggest fix was adding some noise filters to the lights.
Message 2
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| Subject: | Re: Static On GTN-650 |
At 10:30 AM 12/20/2021, you wrote:
> >but the biggest fix was adding some noise filters to the lights.
>
>Is there a filter available for purchase specific to this type of problem?
So you know how the noise is getting into the avionics?
Through the antenna(s), ground loops or conducted power?
Refresh my memory, what combination of lights/power supplies
are being discussed?
Way back when, the BuckPuck was a popular but noisy
power supply for some DIY nav lights. We crafted
a filter assembly for that product which sold rather
well for a time.
http://aeroelectric.com/Pictures/Lighting/Buck-Puck/
This was for radiated noise that found it's way
in through antennas. I've got some residual
ecbs around here for another filter that used
surface mounted parts that also tamed radiated
noise from some auto-led conversions installed
as landing/taxi lights.
Bob . . .
Un impeachable logic: George Carlin asked, "If black boxes
survive crashes, why don't they make the whole airplane
out of that stuff?"
Message 3
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| Subject: | Re: Static On GTN-650 |
cluros(at)gmail.com wrote:
> We had the same problem with our amazon lights making noise in the intercom.
Better headsets helped, finding one wiring problem in the intercom wiring helped,
but the biggest fix was adding some noise filters to the lights. Here's the
little filter box I made. It's not a great diagram, the box around the electronics
is not wiring, it's a box.
>
[/quote]
Can anyone help me understand what the component symbols and numbers in the diagram
refer to? I understand that they refer to components in the diagram, but
what are they? I could not find them in review of electrical component symbols
and the associated numbers.
A picture of the completed device would help a DIY builder understand it. if its
not too much trouble.
As the OP asked, if anyone is aware of a reference to a commercially available
device, it would be appreciated.
I'm a little surprised that the GTN 650 would be susceptible to such interference.
I wonder if the Garmin help technicians have anything to say about it? Many
years ago, my little GPS 92 would go blank whenever I tuned the nav radio to
our home field VOR frequency. Astonishingly, the Garmin help tech denied such
a thing could be happening.
Thanks,Eric
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=505314#505314
Message 4
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| Subject: | Re: Static On GTN-650 |
>So you know how the noise is getting into the avionics? Through the
antenna(s), ground loops or conducted power?
I do not how the noise is getting to the GTN.
>Refresh my memory, what combination of lights/power supplies are being
discussed?
The fiberglass airplane has a B&C alternator and it feeds power to two
"ships power" copper bus bars with Klixon circuit breakers and one of
these circuit breakers feeds the LED landing light.
The avionics copper bus bar gets its power from one of the ships power
copper bus bars through a LT-100 Honeywell switch that feeds the
avionics copper bus bar that powers the GTN, transponder, ADS-B, and the
SL-15 audio panel.
The switch panel for aircraft lighting is in the overhead and the power
from the overhead switch panel is routed in a different location than
the GTN radio unit and power wires however there is one location where
the LED power and ground wires will cross the antenna coax cable for the
radio however the wires do not run parallel to the coax cable just at a
90 degree angle.
The audio panel is a SL-15 and I have a Dynon radio that is quiet when
the LED landing light is turned on. If I select the GTN for the
transmit/receive then I hear the static. When I turn off the landing
light switch the static stops.
How would one (me) be able to determine the source of the static?
The lights in question are theses:
https://www.amazon.com/gp/product/B01H6Z2XZ6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Again...always grateful for the help!!!
On 12/20/2021 10:29 AM, Robert L. Nuckolls, III wrote:
> At 10:30 AM 12/20/2021, you wrote:
>> >but the biggest fix was adding some noise filters to the lights.
>>
>> Is there a filter available for purchase specific to this type of
>> problem?
>
> So you know how the noise is getting into the avionics?
> Through the antenna(s), ground loops or conducted power?
> Refresh my memory, what combination of lights/power supplies
> are being discussed?
>
> Way back when, the BuckPuck was a popular but noisy
> power supply for some DIY nav lights. We crafted
> a filter assembly for that product which sold rather
> well for a time.
>
> http://aeroelectric.com/Pictures/Lighting/Buck-Puck/
>
> This was for radiated noise that found it's way
> in through antennas. I've got some residual
> ecbs around here for another filter that used
> surface mounted parts that also tamed radiated
> noise from some auto-led conversions installed
> as landing/taxi lights.
>
>
> Bob . . .
>
> Un impeachable logic: George Carlin asked, "If black boxes
> survive crashes, why don't they make the whole airplane
> out of that stuff?"
>
Message 5
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| Subject: | Re: Low voltage warning light |
> A few years ago I bought a self-contained large LED from Perihelion
Design, but that is no longer available
From: owner-aeroelectric-list-server@matronics.com
<owner-aeroelectric-list-server@matronics.com> On Behalf Of DANIEL
PELLETIER
Sent: 20 December 2021 00:15
Subject: ****SPAM**** Re: AeroElectric-List: Low voltage warning light
www.PerihelionDesign.com <http://www.PerihelionDesign.com>
Envoy=C3=A9 de mon iPad
Le 17 d=C3=A9c. 2021 =C3- 17:58, Bill Boyd <sportav8r@gmail.com
<mailto:sportav8r@gmail.com> > a =C3=A9crit :
=EF=BB
I have a spare yellow incandescent light from B&C designed to be used
with their regulators. I used a pair of these regulators for my
two-alternator design, and have the low voltage warning light powered
only by the regulator for the backup alternator wired so that it
extinguishes as long as the main alternator is online, putting out its
higher set voltage.
If you are using B&C or similar regulators, this bulb might be just what
you need. Yours for an SASE if it can be of help to your project.
Should show ok in this pic.
-Bill B
On Fri, Dec 17, 2021 at 5:26 PM Charlie England <ceengland7@gmail.com
<mailto:ceengland7@gmail.com> > wrote:
On Fri, Dec 17, 2021 at 3:34 PM Peter Pengilly <Peter@sportingaero.com
<mailto:Peter@sportingaero.com> > wrote:
I=99m looking for a low voltage warning light that illuminates at
around 13.2 to 13.5 volts, can anyone recommend one?
I like having a large, bright, low voltage warning light in my panel
that indicates when the battery is supporting the electrical loads.
A few years ago I bought a self-contained large LED from Perihelion
Design, but that is no longer available and I have sold that aeroplane.
My current aeroplane does not have a good warning system so I would like
to buy another.
I could build one from an op amp and a couple of resistors, but
I=99m not that great with electronics and I=99ve got too
much other stuff to do right now. The Perihelion unit was well packaged
and easy to install. I would like to buy something similar. Can anyone
recommend anything?
Peter
Hi Peter,
Dan Horton (posts on Van's Air Force, and sometimes on HBA) recommended
these modules, or a similar product, from TomTop:
https://www.tomtop.com/p-e1021.html#flow_qa
I bought a couple to play with a couple of years ago, but have never
taken the time to experiment with them. The site says they're currently
out of stock, but you might be able to find a similar product on the
site. You'd still need to add your own display lamp or LED; the device
just provides a set of 'dry' relay contacts.
Depending on which alternator you're using, it may well have built-in
low voltage detection; all you'd need to do in that case is hook up a
wire to your warning light (the alternator drives an 'idiot light').
Charlie
Message 6
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| Subject: | Re: Static On GTN-650 |
snip
>
> How would one (me) be able to determine the source of the static?
>
snip
If you have or can borrow a spare 12V battery (could be a small one),
disconnect the feeder to the lights at the CB, and connect it to the
spare battery. Ground the spare battery at the common ground point in
the fuselage.
If you power up the a/c and there's no noise in the radio, then the
noise is likely coming in through the power wires. If you still have the
noise, it's likely getting radiated & detected by the radio.
--
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
Message 7
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| Subject: | Re: Low voltage warning light |
You can buy these on my website PerihelionDesign.com for $49.95. I have to charge
shipping of $10.00. The standard is red, blinking or steady. Please specify.
I can also supply other colors.
Envoy de mon iPad
> Le 19 dc. 2021 09:41, John M Tipton <johntiptonuk@hotmail.com> a crit :
>
>
> Hi Peter - Its a pity 'Bob' doesn't produce his AEC9005-201 'Low Voltage' module
any more, even the parts kit would be good for a home build project if it
were available - John
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=505303#505303
>
>
>
>
>
>
>
>
>
Message 8
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| Subject: | Re: Low voltage warning light |
I don't see a low voltage warning light on PerihelionDesign.com
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=505321#505321
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