---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 11/24/17: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 07:19 AM - Value of the List... (Matt Dralle) 1. 08:01 AM - Re: Transponder Antenna issue... (Robert L. Nuckolls, III) 2. 08:10 AM - Re: Re: Transponder antenna () 3. 12:35 PM - Re: z13/8 ess bus feed (mmcelrea) 4. 02:54 PM - Alarm souder with multiple sources (Achille) 5. 05:37 PM - Re: Transponder Antenna (Andrew Meyer) ________________________________ Message 0 _____________________________________ Time: 07:19:24 AM PST US From: Matt Dralle Subject: AeroElectric-List: Value of the List... If you look forward to checking your List email everyday (and a lot of you have written to say that you do!), then you're probably getting at least $20 or $30 worth of Entertainment from the Lists each year. You'd pay twice that for a subscription to some magazine or even a dinner out. Isn't the List worth at least that much to you? Wouldn't it be great if you could pay that amount and get a well-managed media source free of advertising, SPAM, and viruses? Come to think of it, you do... :-) Won't you please take a minute to make your Contribution today and support these Lists? http://www.matronics.com/contribution Or, drop a personal check in the mail to: Matt Dralle / Matronics 581 Jeannie Way Livermore CA 94550 USA I want to say THANK YOU to everyone that has made a Contribution thus far during this year's List Fund Raiser!! These Lists are made possible exclusively through YOUR generosity!! Thank you for your support! Matt Dralle Email List Admin. ________________________________ Message 1 _____________________________________ Time: 08:01:45 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Transponder Antenna issue... At 04:56 PM 11/22/2017, you wrote: >The other option that I'm considering is a Sim Jim antenna far up in >the nose to the left - as far past the battery as I can get it or in >the right wing root - about 4 feet to the right of the pink bag of >fluid that manipulates the controls... I do want it out of the wind >because any drag at 170 knots with only 50 or 60 HP pushing at >altitude makes a BIG difference. > >https://m0ukd.com/calculators/slim-jim-and-j-pole-calculator/ > >Set the velocity factor at about .94 with 14 gauge solid (house) >wire and tune at 1060MHz (half way in between 1030 and 1090.) I use >one of these for my Stratux ADS-B and get 200+ mile returns from >aircraft... Any thoughts on how to do this better? The 'slim jim' is a 3/4 wave assembly consiting of a 1/2 wave, end fed dipole and a 1/4 wave matching section. Bob Archer designed and sold a 1/2 wave, gamma matched dipole suitable for mounting on inside surface of a glass and plastic airplane . . . 2/3 the length of a 'slim jim'. I think ACS still sells this antenna. Bob . . . ________________________________ Message 2 _____________________________________ Time: 08:10:20 AM PST US From: Subject: Re: AeroElectric-List: Re: Transponder antenna So the noise is breaking intercom squelch? I=99ve noticed that in many EZ type installations, the transponder RF =9Cclicking=9D noise is actually getting in to the headset itself. Especially if it is the active noise canceling variety. It didn=99t seem to matter what intercom was being used, VOX system shielding, ground separation and even ferrite chokes added to the power/coax/audio lines...or even transponder. In one case I could even unplug the headset and still get the noise. Mostly, I found that I can get the intensity of the noise to change (and even disappear in some positions) as I rotate my head (with headset on) or move to different parts of the cabin and/or moving the control box around. It can be replicated on the ground as well if you are in an active surveillance area and can get your transponder to be active. Try that and using a different brand and type of headset and see if you have similar results. If so, there is not much you can do about it but change headset vendor/type if you find a quiet one or increase the size of the ground plane if you have the room =93 which is quite limited in an EZ. Let us know what you find. -James Berkut/Race 13 From: Steve Stearns Sent: Monday, November 13, 2017 8:43 AM Subject: Re: AeroElectric-List: Re: Transponder antenna *IF* you are or will be using an ADS-B out 1090 MHz transponder on the antenna in question be aware that it's output is enough different than the non-ADS-B transponder that where the later would work with no problem, the former may inject "ticks" into your audio. I've debugged enough to be *quite* certain that the interference path is from the energy radiated off of the antenna itself into the mic circuitry on my panel mount Sigtronics intercom. ________________________________ Message 3 _____________________________________ Time: 12:35:51 PM PST US Subject: AeroElectric-List: Re: z13/8 ess bus feed From: "mmcelrea" Is it acceptable to use cb's, fuses or limiters in place of the fuse links from the stby alternator, main bus to master and the alternate essential bus feed? Also is it ok to use 1 amp fuses in place of fuse links from the shunts on a G3X system? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=475590#475590 ________________________________ Message 4 _____________________________________ Time: 02:54:33 PM PST US Subject: AeroElectric-List: Alarm souder with multiple sources From: "Achille" Good day ! I need some help to wire an alarm (souder and one red light) with multiple sources. I have my ignition sending a signal on an exit to power up an alarm souder up to 75ma, I want to use a sounder, and first of all I would like to set it with also on the same alarm (warning and led) a low oil pressure sensor, a low fuel level alarm. I was thinking about to use diode, but wich kind on diode could I use for this use ? (Because I have a big diode to power my essential bus from my main bus. And I will not set this kind of diode right ?) Also, as master warning on other plane i want to be allowed to cancel the alarm. (Switch to push with instable position, to mute it) For exemple before start I will have after power up, the alarm (low pressure) and i don't want to stay with my Alarm all time that I will take an ATIS for exemple, but it's the same during a faillure. And this point it's a bit difficult for me. I have wired a similar thing on a motor home there was 10 years.. but 10 years after. I don't remember how I wired it, just that I used relays. Anyone could Help me ? Thank you. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=475593#475593 ________________________________ Message 5 _____________________________________ Time: 05:37:34 PM PST US From: Andrew Meyer Subject: AeroElectric-List: Re: Transponder Antenna Bob, etc all., Thank you. For the short term, I bought a piece of 1/8" brass rod, turned down and soldered the old connector to this rod, put the ball on the end and installed... Going to test fly tomorrow. Matched the length, etc... I will explore the internal options shortly. Slowly getting rid of drag. Need to do it faster though. Happy Flyin'! Andy ------------------------------------------------------------------------------------- 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.