Today's Message Index:
----------------------
1. 07:27 AM - Re: antenna connections (messydeer)
2. 07:54 AM - Re: Re: antenna connections (Robert L. Nuckolls, III)
3. 08:22 AM - Re: antenna connections (messydeer)
4. 11:06 AM - Re: Re: antenna connections (Robert L. Nuckolls, III)
5. 09:12 PM - Re: antenna connections (messydeer)
6. 10:04 PM - Question about ADS-B In/Out and Transponders (Ralph Finch)
7. 11:04 PM - Re: Question about ADS-B In/Out and Transponders (Dave Saylor)
Message 1
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| Subject: | Re: antenna connections |
Thanks, Bob :-)
I'll prolly get that antenna from RS. I had read some about antennas being 'tuned',
so any 22" long one would work?
Also heard something about different resistance in either the connectors or the
antenna. Do I need to be concerned about that?
--------
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=357815#357815
Message 2
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| Subject: | Re: antenna connections |
At 09:23 AM 11/14/2011, you wrote:
>
>Thanks, Bob :-)
>
>I'll prolly get that antenna from RS. I had read some about antennas
>being 'tuned', so any 22" long one would work?
Yes, that's total length from top of mounting surface to
tip of antenna . . . so that includes height of the mount.
>Also heard something about different resistance in either the
>connectors or the antenna. Do I need to be concerned about that?
No. There ARE connectors designed for minimizing
"impedance bumps" at the joints for the popular
feed line impedances . . . but that's of no
significance to our task.
Bob . . .
Message 3
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| Subject: | Re: antenna connections |
Goodie :-)
I know suggested I get a UHF-BNC adapter and that you have BNC right angle connectors.
I just noticed the seller of these mounts also has a UHF right angle adapter.
Would you have a straight UHF connector for the cable, or should I stick
with plan A and get a straight UHF-BNC adapter?
--------
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=357826#357826
Attachments:
http://forums.matronics.com//files/right_angle_uhf_connector_ra259_236.jpg
Message 4
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| Subject: | Re: antenna connections |
At 10:19 AM 11/14/2011, you wrote:
>
>Goodie :-)
>
>I know suggested I get a UHF-BNC adapter and that you have BNC right
>angle connectors. I just noticed the seller of these mounts also has
>a UHF right angle adapter. Would you have a straight UHF connector
>for the cable, or should I stick with plan A and get a straight
>UHF-BNC adapter?
UHF to BNC
Bob. . .
Message 5
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| Subject: | Re: antenna connections |
K.
Got the RS antenna. My only initial anal concern was the weight at .20" diameter
at the 22" mark. It tapered down to less than 1/8", but that was near the end
of the original 120". I've seen some com antennas listed as 0.15" thick, so
I gained 1.5 oz.
I bent it at ~8" to about 40 degrees after heating it with a propane/air torch.
Used a little $10 HF tubing bender. It wanted to also put another bend real close
to the base, but the bender config would have made that real tough, so I
increased the bend to 68 degrees at the original location.
I ran a scotchbrite roloc over it to get the discoloration out, which was fairly
easy to do. Will this area be as stain resistant as the other areas? When I
got my EGT probes, the bayonets were welded to hose clamps. Around the welded
area there was rust.
Clearance under my Sonex TD is ~19" at the planned location of the antenna. Vertical
for the antenna is ~13", giving me 6" ground clearance. I also just bought
that base connector off eBay.
This has been the type of project I really like. Doing something simple and saving
money. $22 for the antenna, $5 for the mount, $2 for the BNC-UHF adapter at
Frys. That compares to over $65 just for the antenna at ACS, which still needs
more bending to go on the belly. Thanks, Bob!
--------
Dan
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=357902#357902
Attachments:
http://forums.matronics.com//files/rs_antenna_single_bend_822.jpg
Message 6
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| Subject: | Question about ADS-B In/Out and Transponders |
Assume I want ADS-B In and Out capability. In a new build--no legacy
equipment--can I install ONLY a UAT on 978 MHz? or do I still need to also
install at least a Mode-C transponder (1090 MHz)?
Message 7
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| Subject: | Re: Question about ADS-B In/Out and Transponders |
FAR 91.215 says you have to have a transponder. Maybe that will change
some day, but they've got a few years.
Dave Saylor
AirCrafters
140 Aviation Way
Watsonville, CA 95076
831-722-9141 Shop
831-750-0284 Cell
On Mon, Nov 14, 2011 at 9:57 PM, Ralph Finch <ralphmariafinch@gmail.com>wrote:
> Assume I want ADS-B In and Out capability. In a new build--no legacy
> equipment--can I install ONLY a UAT on 978 MHz? or do I still need to also
> install at least a Mode-C transponder (1090 MHz)?
>
> *
>
> *
>
>
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