---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 04/05/08: 4 ---------------------------------------------------------- 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 _____________________________________ Time: 12:23:50 AM PST US From: The Kuffels Subject: Re: AeroElectric-List: 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 _____________________________________ Time: 07:11:00 AM PST US From: "earl_schroeder@juno.com" Subject: Re: AeroElectric-List: 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" 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 _____________________________________ Time: 03:41:01 PM PST US From: "Peter Pengilly" Subject: RE: AeroElectric-List: 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 _____________________________________ Time: 07:19:45 PM PST US From: Ernest Christley Subject: Re: AeroElectric-List: 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 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.