Today's Message Index:
----------------------
1. 12:23 AM - Re: Source for a VHF Diplexer Splitter (The Kuffels)
2. 07:11 AM - Re: Source for a VHF Diplexer Splitter (earl_schroeder@juno.com)
3. 03:41 PM - Re: Re: Transponder for sale (mode S) (Peter Pengilly)
4. 07:19 PM - Re: Re: Transponder for sale (mode S) (Ernest Christley)
Message 1
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Subject: | Re: Source for a VHF Diplexer Splitter |
Bill,
<< I need to split my one nav antenna into both a nav and glide
slope receiver. Where can I find an inexpensive splitter? >>
Jim Weir of RST Engineering suggests a series resonant circuit
composed of a 10pf capacitor and a total of 1 inch of lead length.
You can build the splitter with a small project box, two short
lengths of co-axial cable with BNC plugs on one end and a BNC
jack. Run one cable through a grommet on one side of the box to
the jack on the other side. Connect the shield by forming two
pigtails. This cable goes to the VOR. Run the other cable
through a second grommet. Strip off 1/2 inch of outer
insulation, shield and inner insulation. Put some heat shrink
over the cable. Cut one lead of the capacitor to 1/2 inch and
solder it along the cable center conductor. Make sure the shield
is well trimmed and can't touch the center conductor. Insulate
with the heat shrink tube. This cable will go to the Glide Slope.
Put 1/2 inch of insulation on the other lead of the capacitor.
Wrap the other capacitor lead around the center post of the BNC
jack with no lead showing beyond the insulation and solder.
Ty-wrap the cables together and just inside the grommet to
prevent pulling on the connections.
This is what I'm doing for the KX-155 in my Sportsman. Can't get
much simpler or cheaper.
Tom Kuffel
Message 2
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Subject: | Re: Source for a VHF Diplexer Splitter |
Bill, if you want to 'roll your own', try www.rst-engr.com I made one and it works. Otherwise, check Chief aircraft for low pricing. Earl
-- "Bill Bradburry" <bbradburry@bellsouth.net> wrote:
I need to split my one nav antenna into both a nav and glide slope receiver.
Where can I find an inexpensive splitter?
Bill B
Message 3
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Subject: | Re: Transponder for sale (mode S) |
Well, Mode S is not mandatory in all European airspace, although if you
fly IFR it is. There=92s still plenty of sky where no transponder at all
is required, or radio for that matter ' at least for the time being.
What=92s an ELT (not required in the UK)? That=92s the wonderful thing
about
Europe ' common rules across all of the EU ;)
Peter
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
gmcjetpilot@yahoo.com
Sent: 04 April 2008 22:52
Subject: AeroElectric-List: Re: Transponder for sale (mode S)
Mode S is mandatory in Europe? Mode S is already obsolete in the USA.
They are fighting for the next gen transponder (that will be even more
expensive).
http://www.aopa.org/advocacy/articles/2008/080304ads-b.html
The fact is Mode S does not do anything more for general aviation. Even
as a technology its based on OLD technology. So for the USA take a wait
see attitude.
I find it draconian that the Euro authorities mandated this. Well may be
better than being in limbo as the USA fights. However for USA fliers
hang on to your Mode C transponder it does all you need, position and
altitude, probably for another 20 years or more. I love how the USA gave
into METARS and WX reports with french words like "fum=E9e" in weather
reports. Now they are just issuing unilateral rules, country by country.
Some countries have even mandated 406 ELT's. So you don't have one you
can't fly there. They will actually ground the plane and make you
install one, I've been told. I fly international.
Yes the future is sunny with data links and other fancy things, all mean
nothing to me in my RV-7. I have 1970's technology, a tube TDR950
Collins. Actually I have two of them. I bought both off eBay, ones a
spare. I think with both I have $500 into it, including antenna. That is
progress!
Message 4
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Subject: | Re: Transponder for sale (mode S) |
Peter Pengilly wrote:
> Mode S is mandatory in Europe? Mode S is already obsolete in the USA.
> They are fighting for the next gen transponder (that will be even more
> expensive).
>
> http://www.aopa.org/advocacy/articles/2008/080304ads-b.html
>
> The fact is Mode S does not do anything more for general aviation. Even
> as a technology its based on OLD technology. So for the USA take a wait
> see attitude.
>
>
I find it amazing that a group of volunteers can develop a $200 laptop
to distribute to children in third world countries that, as only one
small part of the project, includes a mesh network technology that
allows them configure themselves to talk to one another on the fly. A
GPS signal (another $100) and a shared database (a correspondingly cheap
FAA controlled ground-station) gives a complete information sharing system.
Yet, we have a local representative advocating a "low-cost" ADS-B system
that would cost around $3,000. It is simply freaking ridiculous how
"those that know more than we do" continue to settle on technologies
that are outdated and controlled by entrenched commercial interest to
the detriment of us all.
--
http://www.ronpaultimeline.com
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