 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
rparigor(at)suffolk.lib.n
Guest
|
 Posted: Wed Feb 18, 2009 9:39 pm Post subject: Anyone have info how they mounted wing tip stro |
 |
|
Any ideas on how to filter out 100 milivolt spike that is very very sharp with a duration of ~ 75 miliseconds coming from Kuntzleman strobe power supply, then radiating from power lines and getting into my antenna?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Getting closer to resolve to my tick, tick, ticking coming from Kuntzleman strobe. First off It is the Vertex VXA-700 that breaks squelch. I called factory today and they said when you put an aircraft antenna on them, they are sensative.
Next is high voltage from power supply, believe it or not, using the shielded cable from Kuntzleman, dosen't matter much if you have 1 foot or 25 feet, it just dosen't radiate that much.
The power supply radiates a lot no matter how you ground things, but 8 feet away with antenna under worst case and 6 feet away under best case fixes tick, tick, ticking. So power supplies will live in wingtips away from antennas.
The power wires are the culprit at the moment! First off I am running Vertex on internal battery so it is not dirty radio supply power causing problem, it is RF jumping off the supply lines getting into antenna!
Using shielded wire for supply has more RF jumping off compared to twisted pair no matter how I grounded shield! Can't explain it but it is so.
Using twisted pair with optimum grounding, now has ticking only happening on lower and higher frequencies.
Observing supply power at battery on a scope, there are very very sharp spikes 100 milivolts, with a duration of about 75 miliseconds that equate perfectly to Vertex VXA-700 breaking squelch.
Anyone have any ideas on how I can filter this out? And where to get parts needed?
I guess I will need two filters, one for each power supply at the wingtips.
Ron P.
Visit - www.EuropaOwners.org
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Europa-List |
|
|
|
| Back to top |
|
 |
grahamsingleton(at)btinte
Guest
|
| Posted: Thu Feb 19, 2009 1:38 am Post subject: Anyone have info how they mounted wing tip stro |
|
|
rparigoris wrote:
| Quote: | The power supply radiates a lot no matter how you ground things, but 8 feet away with antenna under worst case and 6 feet away under best case fixes tick, tick, ticking. So power supplies will live in wingtips away from antennas.
The power wires are the culprit at the moment! First off I am running Vertex on internal battery so it is not dirty radio supply power causing problem, it is RF jumping off the supply lines getting into antenna!
Ron
|
have you seen this web site? might be relevant?
Graham
http://www.eham.net/reviews/detail/3377
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Europa-List |
|
|
|
| Back to top |
|
|
frans(at)paardnatuurlijk.
Guest
|
| Posted: Thu Feb 19, 2009 3:25 am Post subject: Anyone have info how they mounted wing tip stro |
|
|
rparigoris wrote:
| Quote: |
<rparigor(at)suffolk.lib.ny.us>
Any ideas on how to filter out 100 milivolt spike that is very very
sharp with a duration of ~ 75 miliseconds coming from Kuntzleman
strobe power supply, then radiating from power lines and getting into
my antenna?
|
Run the power leads through a torroid, and put a capacitor on both ends
between the power lines.
Maybe just installing a capacitor of 100n over the power lines as close
as possible to the strobe power supply is already enough. If not, add
the torroids and more capacitors.
Ground the radio and the strobe power supply preferably at the same
spot. Use twisted pair power supply's. Do not power anything else from
the same leads (like nav lights).
Also, disconnect the antenna to find out if the receiver still picks up
the noise. If so, the noise comes in via the radio power supply. Use the
same filter (torroid plus capacitors) in the radio power leads to remedy it.
If using shielded cable, always shield at one end, and leave the other
end unattached.
Preferably use the Europa suggested COM antenna. This one has the best
noise rejection potential.
Make sure your coaxial antenna cable is properly RF-separated. You might
need to coil it up close to the antenna, or use a dozen or so torroids
over the cable (like proposed for the Europa antenna, but this applies
to all brands).
--
Frans Veldman
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Europa-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
