Today's Message Index:
----------------------
1. 11:04 AM - Open source wig-wag project (Robert L. Nuckolls, III)
2. 11:16 AM - Re: Open source wig-wag project (Robert L. Nuckolls, III)
3. 12:20 PM - Wingtip VOR antenna in the Connection (Dj Merrill)
4. 04:44 PM - ELT Antenna (406MHz) - Copper Dipole style...will this work? (plevyakh)
5. 06:08 PM - Re: ELT Antenna (406MHz) - Copper Dipole style...will this work? (Kelly McMullen)
6. 06:10 PM - Re: ELT Antenna (406MHz) - Copper Dipole style...will this work? (Tim Andres)
Message 1
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| Subject: | Open source wig-wag project |
Master byte thrasher Paul is putting some
final touches on the software for the AEC9012
Programmable Wig-Wag controller. I ran some tests
on the bench with 55w halogen lamps and was gratified
at the response rate of these bulbs in a triple-
flash mode.
First passes at the software offered a single-flash
mode (ostensibly for tungsten lamps) and a triple-flash
mode for LED lamps due to their faster switching speeds.
As you can see in this video . . .
http://tinyurl.com/c5uzsjd
. . . the halogen lamps intensity modulate quite nicely in the
triple-flash mode so we're eliminating the single flash
mode. Further, we've added a software option that installer
can select that makes the AEC9012 compatible with either single
or two-switch panel controls.
A production quantity of boards arrived today. Some
additional parts are expected Saturday. The data
package for project will be posted at
http://tinyurl.com/bpoqdj7
Paul is having so much fun at the computer he's already
bugging me for the next project.
Many thanks to Greg and Paul who have so successfully
wrangled the bytes into doing a good thing.
Bob . . .
Message 2
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| Subject: | Re: Open source wig-wag project |
I had a query about source and object code for the wig-wag
controller. As soon as Paul puts the final polish on it,
both the hex and c-source codes will be published as well.
Bob . . .
Message 3
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| Subject: | Wingtip VOR antenna in the Connection |
Bob,
On page 13-16 (Chapter 13, page 16) of the Aeroelectric
Connection there is a diagram of an antenna designed to be fit into a
wingtip.
My best guess is that this antenna requires at least 10.5 inches of
space, measuring the depth of the wingtip from the outer end to the
first wing rib. At most I have about 8 inches of depth in my Glastar
wingtips, but I'd really like to use this type of antenna if possible.
Is it possible to make changes to this antenna so that it will fit in
my wingtip, or should I instead pursue a "Rabbit Ears" design as shown
on page 14?
Do you have specific dimensions and instructions for constructing the
Rabbit Ears antenna, similar to the figures for the wing tip and
glideslope antennas?
Thanks,
-Dj
--
Dj Merrill - N1JOV
Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/
Glastar Flyer N866RH - http://deej.net/glastar/
Message 4
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| Subject: | ELT Antenna (406MHz) - Copper Dipole style...will this |
work?
Folks,
I'm building a GlaStar (composite glass fuselage with metal wings and control surfaces).
I'm going with INTERNAL mount for the antenna, and will be placing it just AFT
of my bulkhead "A" as one of the most survivable locations in a crash for my aircraft.
I have the ACK E-04 unit and it comes with it's own antenna, but that requires
creating a 48" dia. ground plane! (24" long copper foil elements, per the E-04
Install guide). I don't have the room for this in the tail cone...given I
have other stuff back there in the way.
I have one of Jim Weir's RS-802 Copper Dipole Antenna kits and I was going to make
my own. His kit dwg 802-8905 shows how to create one for the older style
121.5 units. So I'm thinking I'd use this same X cross style antenna, and have
one V with Lengths = 22.5" (121.5MHz), and the other V with lengths = 7.3"
(406MHz).
This should fit nicely onto the sidewall of the tunnel AFT of Bulkhead "A" in a
vertically mounted position (see attached dwg).
Am I correct in my modification of the Jim Weir design to be able to accommodate
the 406MHz frequency?
Are there any other changes I need to make with this double V design to make it
work?
Has anyone run into a problem in their Final FAA inspection in getting approval
to use a "Double V style antenna"?
Thanks for any thoughts.
Howard
--------
Howard Plevyak
GlaStar / North Bend, Ohio
hplevyak@mac.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=390046#390046
Attachments:
http://forums.matronics.com//files/elt_copper_foil_dipole_x_design_123.jpg
Message 5
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| Subject: | Re: ELT Antenna (406MHz) - Copper Dipole style...will |
this work?
It will be dependent on DAR you use. On the face of it, the ELT is ONLY
TSO approved with supplied antenna(or optional approved antennas).
Any other antenna will have a different VSWR that may or may not affect
the ELT performance and cause it to not meet TSO requirements.
Note that even on experimental, IF you are required to have an ELT, it
must be a TSO ELT. Whether your DAR will exercise any discretion there
or not you won't know without asking up front.
On 12/7/2012 5:43 PM, plevyakh wrote:
>
> Folks,
> I'm building a GlaStar (composite glass fuselage with metal wings and control
surfaces).
>
> I'm going with INTERNAL mount for the antenna, and will be placing it just AFT
of my bulkhead "A" as one of the most survivable locations in a crash for my
aircraft.
>
> I have the ACK E-04 unit and it comes with it's own antenna, but that requires
creating a 48" dia. ground plane! (24" long copper foil elements, per the
E-04 Install guide). I don't have the room for this in the tail cone...given
I have other stuff back there in the way.
>
> I have one of Jim Weir's RS-802 Copper Dipole Antenna kits and I was going to
make my own. His kit dwg 802-8905 shows how to create one for the older style
121.5 units. So I'm thinking I'd use this same X cross style antenna, and
have one V with Lengths = 22.5" (121.5MHz), and the other V with lengths = 7.3"
(406MHz).
>
> This should fit nicely onto the sidewall of the tunnel AFT of Bulkhead "A" in
a vertically mounted position (see attached dwg).
>
> Am I correct in my modification of the Jim Weir design to be able to accommodate
the 406MHz frequency?
>
> Are there any other changes I need to make with this double V design to make
it work?
>
> Has anyone run into a problem in their Final FAA inspection in getting approval
to use a "Double V style antenna"?
>
> Thanks for any thoughts.
> Howard
>
> --------
> Howard Plevyak
> GlaStar / North Bend, Ohio
> hplevyak@mac.com
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=390046#390046
>
>
> Attachments:
>
> http://forums.matronics.com//files/elt_copper_foil_dipole_x_design_123.jpg
>
>
-----
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Checked by AVG - www.avg.com
Message 6
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| Subject: | Re: ELT Antenna (406MHz) - Copper Dipole style...will |
this work?
Hi Howard, I ran into this same problem on my Cozy and studied doing a home brew
antenna myself. Eventually I was able to make a ground plane for the provided
antenna by running 4 wires out from the TSO'd antenna, not the 6 they call for
but the best I could do. So if you do build your own dual band dipole my suggestion
is build it first on cardboard or similar, then go buy a box of doughnuts
and stop in the local 2 way communications dealer and see if they will put
their analyzer on it and check its resonance on both bands. Most city or county
fire dept or law enforcement agency will have some of these guys floating
around also.
As for the legal side it won't be without the TSO antenna. Period.
On the practical side you don't have to have a ELT in phase 1 anyway. Leave it
out until you have what you need from the DAR and then the rest is on you.
Myself, I wouldn't lose any sleep over doing it this way, but you may carry PX
sometime and you need to consider them also. But the other side of that equation,
if you want to rationalize a bit, is the 406/121.5 gps-fed system you have
with a home brew antenna will be far better than the second hand $25 ELT that
is still legal to install.
Tim
Sent from my iPad
On Dec 7, 2012, at 4:43 PM, "plevyakh" <hplevyak@mac.com> wrote:
>
> Folks,
> I'm building a GlaStar (composite glass fuselage with metal wings and control
surfaces).
>
> I'm going with INTERNAL mount for the antenna, and will be placing it just AFT
of my bulkhead "A" as one of the most survivable locations in a crash for my
aircraft.
>
> I have the ACK E-04 unit and it comes with it's own antenna, but that requires
creating a 48" dia. ground plane! (24" long copper foil elements, per the
E-04 Install guide). I don't have the room for this in the tail cone...given
I have other stuff back there in the way.
>
> I have one of Jim Weir's RS-802 Copper Dipole Antenna kits and I was going to
make my own. His kit dwg 802-8905 shows how to create one for the older style
121.5 units. So I'm thinking I'd use this same X cross style antenna, and
have one V with Lengths = 22.5" (121.5MHz), and the other V with lengths = 7.3"
(406MHz).
>
> This should fit nicely onto the sidewall of the tunnel AFT of Bulkhead "A" in
a vertically mounted position (see attached dwg).
>
> Am I correct in my modification of the Jim Weir design to be able to accommodate
the 406MHz frequency?
>
> Are there any other changes I need to make with this double V design to make
it work?
>
> Has anyone run into a problem in their Final FAA inspection in getting approval
to use a "Double V style antenna"?
>
> Thanks for any thoughts.
> Howard
>
> --------
> Howard Plevyak
> GlaStar / North Bend, Ohio
> hplevyak@mac.com
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=390046#390046
>
>
>
>
> Attachments:
>
> http://forums.matronics.com//files/elt_copper_foil_dipole_x_design_123.jpg
>
>
>
>
>
>
>
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