Today's Message Index:
----------------------
1. 12:17 AM - Last "Official" Day To Make Your List Contribution!! (Matt Dralle)
2. 01:46 PM - Electronics International Capacitive Fuel Level Probes P-300C ()
3. 01:54 PM - Re: WX-8 Stormscope (Brinker)
4. 02:15 PM - Re: Electronics International Capacitive Fuel Level Probes P-300C (Marvin Dupree)
5. 02:53 PM - Re: Electronics International Capacitive Fuel Level Probes P-300C (Bruce)
6. 07:28 PM - Re: RF Radiation ()
Message 1
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| Subject: | Last "Official" Day To Make Your List Contribution!! |
--> Avionics-List message posted by: Matt Dralle <dralle@matronics.com>
Dear Listers,
Well, its November 30th and that means three things...
1) Today I am officially 42 years old (sympathy is appreciated)!
2) It marks that last "official" day of the List Fund Raiser!
3) Its the last day I will be bugging everyone for a whole year! :-)
If you use the Lists and enjoy the content and the no-advertising,
no-spam, and no-censorship way in which they're run, please make a
Contribution today to support their continued operation and
upkeep. Your $20 or $30 goes a long way to further the List
operation and keep the bills paid.
A Lister wrote a funny message in the comments field of his
Contribution that I thought summed things up pretty well:
"Worth every penny and I'm a tightwad!"
Thank you to everyone that has made a Contribution so far this
year! It is greatly appreciated.
Contributions: http://www.matronics.com/contribution
Best regards,
Matt Dralle
List Administrator
Matt G Dralle | Matronics | PO Box 347 | Livermore | CA | 94551
925-606-1001 V | 925-606-6281 F | dralle@matronics.com Email
http://www.matronics.com/ WWW | Featuring Products For Aircraft
do not archive
Message 2
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| Subject: | Electronics International Capacitive Fuel Level Probes |
P-300C
--> Avionics-List message posted by: <bbradburry@allvantage.com>
Does anyone know of a maker of an adapter to convert the output of these
capacitive probes to a 0-5V DC output? Or how to do it?
Thanks,
Bill Bradburry
Message 3
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| Subject: | Re: WX-8 Stormscope |
--> Avionics-List message posted by: "Brinker" <brinker@cox-internet.com>
Greetings Mike, any luck on installation manual ?
Thanks Randy
----- Original Message -----
From: "Mike" <mlas@cox.net>
Subject: RE: Avionics-List: WX-8 Stormscope
> --> Avionics-List message posted by: "Mike" <mlas@cox.net>
>
> Randy,
>
> I have not heard of the antennas being that sensitive to damage, just
> false indications. So I wouldn't worry too much about that issue. I
> would bring up the fact that the WX8 has been out of production for well
> over 10 maybe even 20 years, so the unit is old. I will look around for
> an installation manual for that unit and get back to you.
>
> Mike
Message 4
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| Subject: | Re: Electronics International Capacitive Fuel Level Probes |
P-300C
--> Avionics-List message posted by: Marvin Dupree <97corvette@cox.net>
what is the output of the probes now?
marvin
On Nov 30, 2005, at 3:48 PM, <bbradburry@allvantage.com> wrote:
> --> Avionics-List message posted by: <bbradburry@allvantage.com>
>
> Does anyone know of a maker of an adapter to convert the output of
> these
> capacitive probes to a 0-5V DC output? Or how to do it?
>
> Thanks,
> Bill Bradburry
>
>
Message 5
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| Subject: | Electronics International Capacitive Fuel Level Probes |
P-300C
--> Avionics-List message posted by: "Bruce" <bruce@justbruce.com>
Bill,
I don't know if you have the probe already, but you might want to check into
Pillar Point Avionics. They have a capacitance probe and controller that
outputs the 0-5VDC that you are looking for. They designed this to feed
glass panels. Even better, they allow you to calibrate your tank in 20
increments, which gives you extremely accurate measurements. I think most
of the other probes on the market are calibrated only at empty and again
when full, so if you have an odd shaped tank, the numbers displayed are
wildly inaccurate.
I know that their controller only works with their probes. You can mount
their controller in your panel since it has a display, or you can mount it
out of sight if you are using the 0-5VDC to drive a glass panel. Price for
probe and controller/display is $300 which is a pretty good deal for a
digital system. This is all from memory, but I think a second probe adds
another $50. The system can also be calibrated to set off a warning light or
annunciator at any fuel level you select.
Bruce L
Europa XS
Tracy, CA
http://www.ppavionics.com/FG1.html
-----Original Message-----
From: owner-avionics-list-server@matronics.com [mailto:owner-avionics-
list-server@matronics.com] On Behalf Of bbradburry@allvantage.com
Sent: Wednesday, November 30, 2005 1:48 PM
To: avionics-list@matronics.com
Subject: Avionics-List: Electronics International Capacitive Fuel Level
Probes P-300C
--> Avionics-List message posted by: <bbradburry@allvantage.com>
Does anyone know of a maker of an adapter to convert the output of these
capacitive probes to a 0-5V DC output? Or how to do it?
Thanks,
Bill Bradburry
Message 6
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| Subject: | Re: RF Radiation |
--> Avionics-List message posted by: <bakerocb@cox.net>
----- Original Message -----
From: "Paul McAllister" <paul.mcallister@qia.net>
Subject: RE: Avionics-List: RF Radiation
> Hi,
>
> I like simple solutions, and your approach seems like low effort with the
> potential of pleny of upside. Did you just pass the wire through the bead
> once, or did you loop it around a couple of times. If I have to do that
> then I am up for re wiring..... What was the ID of the beads ?
>
> Thanks, Paul
11/30/2005
Hello Paul, The concept is to use split ferrite beads so that you can apply
them any place that you choose along existing wiring with minimal
installation fuss -- no rewiring. Position them on the wire and fasten in
place with a ty wrap or plastic tape.
Just one trip through per bead, no looping, but you can put several beads on
one wire if you think that will help.
I think that the closer the interior of the bead is to the exterior of the
wire the more effective the bead (s) will be. Therefore I used 1/4 inch ID
beads. They seemed to fit my coax and headset cables just fine. I may have
also stuck some on wiring on the back side of some of my avionics boxes. It
has been awhile since I installed the beads. See the web site listed in my
original response copied below for more split bead info.
If you google ferrite split beads you will get additional -- probably
useless, but maybe interesting information.
OC
PS: I noticed that Bob Nuckolls included ferrite beads in one of his recent
answers as helping to solving radiation noise problems. Considering how
cheap they are and how easy to apply it seems like a logical first try.
11/24/2005
Hello Paul, I had an RF interference problem in my KIS TR-1 composite
airplane -- I won't bother you with the details.
My solution was so simple, basic, crude, un analytical and inexpensive that
I am almost embarassed to describe it to you. What I did is just buy a bunch
of split ferrite beads and spread them liberally around in various places
and the problem went away.
If you research ferrite split beads on the internet you will find that they
are a staple in the ham radio community and their construction (material)
and other characteristics can be highly technical in nature. I didn't get
too deeply involved in that.
I got my beads from Surplus Sales of Nebraska
http://www.surplussales.com/FerSplit/FerSplit-1.html. Phone: 402-346-4750.
Item number ICH-264-3164251. $2.00 each (the cheapest). I installed them
just by wrapping them with black plastic tape.
One of these days when I get real curious I will start removing them one by
one to see if the problems come back and to get a better handle on the
source. I suspect that the problem came from antenna radiations getting into
my
systems at certain frequencies.
OC
PS: I don't have much hope for making the Navaid more resistant to RF. It is
a real sieve / sponge. I'll put in a Tru Trak or Trio control unit in some
day.
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