---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 07/15/16: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:01 AM - Re: Contactor orientation (racerjerry) 2. 07:11 AM - Re: Can Someone PLEASE Double Check My Homework?!?!?! (user9253) 3. 07:39 AM - Re: Re: Can Someone PLEASE Double Check My Homework?!?!?! (William Hunter) 4. 08:16 AM - Re: Re: Contactor orientation (Jim Baker) 5. 09:13 AM - Transponder antenna (Steve Kelly) 6. 09:40 AM - Re: Transponder antenna (Robert L. Nuckolls, III) 7. 11:32 AM - breaker as switch for aux alternator? (Ken Ryan) 8. 01:27 PM - Re: Re: Contactor orientation (Jim Baker) 9. 01:46 PM - Re: Transponder antenna (Peter Pengilly) 10. 06:58 PM - Re: Transponder antenna (Steve Kelly) ________________________________ Message 1 _____________________________________ Time: 05:01:39 AM PST US Subject: AeroElectric-List: Re: Contactor orientation From: "racerjerry" Jim Baker, the CPA contactor article you are looking for appeared in the April 2015 issue of their magazine. -------- Jerry King Read this topic online here: http://forums.matronics.com/viewtopic.php?p=458217#458217 ________________________________ Message 2 _____________________________________ Time: 07:11:26 AM PST US Subject: AeroElectric-List: Re: Can Someone PLEASE Double Check My Homework?!?!?! From: "user9253" > what Pole do I connect the bus tie switch grounding wire to? The small right terminal that only has one diode connected to it. Notice that the banded end of the diode does NOT connect to the small right terminal. Also notice that in the picture that Bob posted, http://www.bandc.aero/pdfs/S701-2_Wiring.pdf that there are 3 diodes and each banded end is connected to the small left terminal. Bill, your picture is not very clear, but it looks like one of the 3 diodes is missing and is replaced with a plain jumper wire. If so, something bad will happen. > it does not matter what side of the relay is the power side and what side goes to the starter motor... is this correct? Correct -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=458218#458218 ________________________________ Message 3 _____________________________________ Time: 07:39:59 AM PST US Subject: Re: AeroElectric-List: Re: Can Someone PLEASE Double Check My Homework?!?!?! From: William Hunter >Notice that the banded end of the diode does NOT connect to the small right terminal. Also notice that in the picture that Bob posted... that there are 3 diodes and each banded end is connected to the small left terminal. Bill, your picture is not very clear, but it looks like one of the 3 diodes is missing and is replaced with a plain jumper wire. Sorry. Bad photo. Using a smartphone camera if the flash is on then some items get washed out and if the flash is off then some items are not visible. Then when I compress the photo it makes it worse. Thanks for the confirmation and yes my bus tie contactor does indeed have 3 diodes as delivered. Thanks to all of your help on this forum... when I flip the switch on my electrical system for the first time... it will not have any of the smoke escape from the wires! Bill Hunter On Jul 15, 2016 7:18 AM, "user9253" wrote: > > > > what Pole do I connect the bus tie switch grounding wire to? > The small right terminal that only has one diode connected to it. Notice > that the banded end of the diode does NOT connect to the small right > terminal. > Also notice that in the picture that Bob posted, > http://www.bandc.aero/pdfs/S701-2_Wiring.pdf > that there are 3 diodes and each banded end is connected to the small left > terminal. Bill, your picture is not very clear, but it looks like one of > the 3 diodes is missing and is replaced with a plain jumper wire. If so, > something bad will happen. > > > it does not matter what side of the relay is the power side and what > side goes to the starter motor... is this correct? > Correct > > -------- > Joe Gores > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=458218#458218 > > ________________________________ Message 4 _____________________________________ Time: 08:16:09 AM PST US From: Jim Baker Subject: Re: AeroElectric-List: Re: Contactor orientation VGhhbmtzISBNYWtlcyBpdCBlYXN5IG5vdy4KCkppbSBCYWtlcgo0MDUgNDI2IDUzNzcKCi0tLS0t T3JpZ2luYWwgTWVzc2FnZS0tLS0tCkZyb206IHJhY2VyamVycnkgPGdua2luZzJAdmVyaXpvbi5u ZXQ+ClRvOiBhZXJvZWxlY3RyaWMtbGlzdEBtYXRyb25pY3MuY29tClNlbnQ6IEZyaSwgMTUgSnVs IDIwMTYgODowMApTdWJqZWN0OiBBZXJvRWxlY3RyaWMtTGlzdDogUmU6IENvbnRhY3RvciBvcmll bnRhdGlvbgoKLS0+IEFlcm9FbGVjdHJpYy1MaXN0IG1lc3NhZ2UgcG9zdGVkIGJ5OiAicmFjZXJq ZXJyeSIgPGdua2luZzJAdmVyaXpvbi5uZXQ+CgpKaW0gQmFrZXIsIHRoZSBDUEEgIGNvbnRhY3Rv ciBhcnRpY2xlIHlvdSBhcmUgbG9va2luZyBmb3IgYXBwZWFyZWQgaW4gdGhlIEFwcmlsIDIwMTUg aXNzdWUgb2YgdGhlaXIgbWFnYXppbmUuCgotLS0tLS0tLQpKZXJyeSBLaW5nCgoKCgpSZWFkIHRo aXMgdG9waWMgb25saW5lIGhlcmU6CgpodHRwOi8vZm9ydW1zLm1hdHJvbmljcy5jb20vdmlld3Rv cGljLnBocD9wPTQ1ODIxNyM0NTgyMTcKCgoKCgoKCl8tPT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09Cl8tPSAgICAgICAgICAtIFRoZSBB ZXJvRWxlY3RyaWMtTGlzdCBFbWFpbCBGb3J1bSAtCl8tPSBVc2UgdGhlIE1hdHJvbmljcyBMaXN0 IEZlYXR1cmVzIE5hdmlnYXRvciB0byBicm93c2UKXy09IHRoZSBtYW55IExpc3QgdXRpbGl0aWVz IHN1Y2ggYXMgTGlzdCBVbi9TdWJzY3JpcHRpb24sCl8tPSBBcmNoaXZlIFNlYXJjaCAmIERvd25s b2FkLCA3LURheSBCcm93c2UsIENoYXQsIEZBUSwKXy09IFBob3Rvc2hhcmUsIGFuZCBtdWNoIG11 Y2ggbW9yZToKXy09Cl8tPSAgIC0tPiBodHRwOi8vd3d3Lm1hdHJvbmljcy5jb20vTmF2aWdhdG9y P0Flcm9FbGVjdHJpYy1MaXN0Cl8tPQpfLT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PQpfLT0gICAgICAgICAgICAgICAtIE1BVFJPTklD UyBXRUIgRk9SVU1TIC0KXy09IFNhbWUgZ3JlYXQgY29udGVudCBhbHNvIGF2YWlsYWJsZSB2aWEg dGhlIFdlYiBGb3J1bXMhCl8tPQpfLT0gICAtLT4gaHR0cDovL2ZvcnVtcy5tYXRyb25pY3MuY29t Cl8tPQpfLT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PQpfLT0gICAgICAgICAgICAgIC0gTkVXIE1BVFJPTklDUyBMSVNUIFdJS0kgLQpf LT0gQWRkIHNvbWUgaW5mbyB0byB0aGUgTWF0cm9uaWNzIEVtYWlsIExpc3QgV2lraSEKXy09ICAg LS0+IGh0dHA6Ly93aWtpLm1hdHJvbmljcy5jb20KXy09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KXy09ICAgICAgICAgICAgIC0gTGlz dCBDb250cmlidXRpb24gV2ViIFNpdGUgLQpfLT0gIFRoYW5rIHlvdSBmb3IgeW91ciBnZW5lcm91 cyBzdXBwb3J0IQpfLT0gICAgICAgICAgICAgICAgICAgICAgICAgICAgICAtTWF0dCBEcmFsbGUs IExpc3QgQWRtaW4uCl8tPSAgIC0tPiBodHRwOi8vd3d3Lm1hdHJvbmljcy5jb20vY29udHJpYnV0 aW9uCl8tPT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09CgoKCgo ________________________________ Message 5 _____________________________________ Time: 09:13:33 AM PST US Subject: AeroElectric-List: Transponder antenna From: "Steve Kelly" I'm at that point where I need to install a transponder antenna on the bottom of my fiberglass fuselage. Research shows differing opinions on several issues. -Location, For a number of reasons I am limited to the area below the pilot/ copilot seats. Some say thats too close to your body. Some say it doesn't matter. I have read that the radiation pattern from the antenna is horizontal and in the shape of a donut. If this is true then under seat would seem to be a good location. Also, since I need to add a ground plane, would this serve to reflect any radiation? -Ground plane, I have room for up to a 16" square ground plane. I am unsure as to the size and shape. I have read that if it's round it has to be a certain size, But don't know what that size is. It seems that size doesn't matter as much if its square or octagonal. Also, should I make ground plane as large as I have room for? The antenna is just the standard post and ball from B&C. Would appreciate any feedback, Steve -------- Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=458221#458221 ________________________________ Message 6 _____________________________________ Time: 09:40:46 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Transponder antenna At 11:09 AM 7/15/2016, you wrote: > >I'm at that point where I need to install a transponder antenna on >the bottom of my fiberglass fuselage. Research shows differing >opinions on several issues. > -Location, For a number of reasons I am limited to the area below > the pilot/ copilot seats. Some say thats too close to your body. > Some say it doesn't matter. It doesn't . . . there are no biological hazards associated with proximity to the transponder antenna. > I have read that the radiation pattern from the antenna is > horizontal and in the shape of a donut. Sort of . . . it's 'half a donut' . . . Emacs! If this is true then under seat would seem to be a good location. Also, since I need to add a ground plane, would this serve to reflect any radiation? The ground plane is essential to antenna performance. It it isn't provided by 'very large' surface areas like the skin of a metal aircraft, . . . > -Ground plane, I have room for up to a 16" square ground > plane. I am unsure as to the size and shape. I have read that if > it's round it has to be a certain size, But don't know what that > size is. It seems that size doesn't matter as much if its square > or octagonal. Also, should I make ground plane as large as I have room for? The RADIUS of a minimal ground plane is equal to the seated height of the associated antenna. For a transpoder, this is 5.3" in diameter. > The antenna is just the standard post and ball from B&C. > Would appreciate any feedback, Steve That would be my choice. See chapter 13 of http://tinyurl.com/pt97pha Bob . . . ________________________________ Message 7 _____________________________________ Time: 11:32:22 AM PST US From: Ken Ryan Subject: AeroElectric-List: breaker as switch for aux alternator? For a two alternator (alternator + generator) one battery system similar to Z-13/8 where the generator is the auxiliary and is wired for over voltage so the relay cuts the current TO the regulator (as in Z-16), would it be acceptable to just use the 5 amp panel breaker as the on-off switch for the auxiliary generator, rather than using a toggle switch? In this case the C wire from the regulator would go directly to the main bus (the master switch would be used for the main alternator field wire and battery contactor). I can't see why a push-pull breaker would not be adequate for activating and deactivating the auxiliary generator. Normal use would be once on startup to check that the auxiliary charging system is functional, and then only in the event of a failure of the primary charging system during flight. ________________________________ Message 8 _____________________________________ Time: 01:27:08 PM PST US From: Jim Baker Subject: Re: AeroElectric-List: Re: Contactor orientation Well, that made it easy. Thanks! Jim Baker 405 426 5377 -----Original Message----- From: racerjerry Sent: Fri, 15 Jul 2016 8:00 Subject: AeroElectric-List: Re: Contactor orientation Jim Baker, the CPA contactor article you are looking for appeared in the April 2015 issue of their magazine. -------- Jerry King Read this topic online here: http://forums.matronics.com/viewtopic.php?p=458217#458217 ________________________________ Message 9 _____________________________________ Time: 01:46:42 PM PST US From: "Peter Pengilly" Subject: RE: AeroElectric-List: Transponder antenna The maths to figure the size of the ground plane are quite straight forward when you know that speed of light = frequency x wavelength. For a transponder 3 x 10^8 m/s = 1090 x 10^6 x wavelength Wavelength = 3/10.9 = 0.275m (or 10.84") Most antennas we use are 1/4 wave dipoles, the ground plane should be tuned to the antenna, so the radius should 69mm, diameter 138mm (5.42"). Peter -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Steve Kelly Sent: 15 July 2016 17:10 Subject: AeroElectric-List: Transponder antenna --> I'm at that point where I need to install a transponder antenna on the bottom of my fiberglass fuselage. Research shows differing opinions on several issues. -Location, For a number of reasons I am limited to the area below the pilot/ copilot seats. Some say thats too close to your body. Some say it doesn't matter. I have read that the radiation pattern from the antenna is horizontal and in the shape of a donut. If this is true then under seat would seem to be a good location. Also, since I need to add a ground plane, would this serve to reflect any radiation? -Ground plane, I have room for up to a 16" square ground plane. I am unsure as to the size and shape. I have read that if it's round it has to be a certain size, But don't know what that size is. It seems that size doesn't matter as much if its square or octagonal. Also, should I make ground plane as large as I have room for? The antenna is just the standard post and ball from B&C. Would appreciate any feedback, Steve -------- Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=458221#458221 ________________________________ Message 10 ____________________________________ Time: 06:58:12 PM PST US Subject: AeroElectric-List: Re: Transponder antenna From: "Steve Kelly" Thank you. Those are the answers I was looking for. Steve -------- Steve Read this topic online here: http://forums.matronics.com/viewtopic.php?p=458227#458227 ------------------------------------------------------------------------------------- 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.