---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 12/17/07: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:00 AM - 2 comms 1 antenna (Greg Scott) 2. 09:38 AM - Re: Aspen Avionics panel: Too good to be true? (Rob Housman) 3. 05:06 PM - Battery Contactors (Noel Karppinen) 4. 05:27 PM - Re: Battery Contactors (Ron Quillin) 5. 05:59 PM - Re: Battery Contactors (Richard T. Schaefer) 6. 07:20 PM - Re: Battery Question? (BobsV35B@aol.com) 7. 07:27 PM - Re: ANL 60 (Kevin Boddicker) 8. 07:36 PM - Re: Aspen Avionics panel: Too good to be true? (Michael Pereira) 9. 08:43 PM - Re: Battery Question? (Richard E. Tasker) ________________________________ Message 1 _____________________________________ Time: 07:00:03 AM PST US From: "Greg Scott" Subject: AeroElectric-List: 2 comms 1 antenna Hi, A newcomer to this list so forgive me if this question(or similar) has been posed before. I am building an RV9 with 2 comm radio's, a Microair M760 with an ICOM A210 and both thru a PM3000 Intercom. My plan is to have a single Antenna and use a 4 pole 2 way switch, 3 poles to switch the audio and the 3rd. to control a 50 Ohm Coax switching relay to connect the antenna. Any forseen problems with this? if so should I use 2 Antenna? this I thought would risk damage to the receiver input of the non transmitting Comm. Greg Scott RV4 G - RVIV U.K. ________________________________ Message 2 _____________________________________ Time: 09:38:04 AM PST US From: "Rob Housman" Subject: RE: AeroElectric-List: Aspen Avionics panel: Too good to be true? In re: HDMI cable I bought a short (1.5 ft) HDMI cable for US$5.25. Longer cables are similarly inexpensive at http://www.mycablemart.com/ Best regards, Rob Housman Irvine, California Europa XS Tri-Gear S/N A070 Airframe complete -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of psiegel@fuse.net Sent: Saturday, December 15, 2007 4:12 AM Subject: AeroElectric-List: Aspen Avionics panel: Too good to be true? I'm finding it impossible to keep a vacuum driven artificial horizon healthy in the panel of my 180 horse Super Cub. The new Aspen Avionics all electric Horizon/HSI looks like a great alternative! And compared to other similar avionics packages, it is very economical! Anybody have thoughts on the Aspen unit? Speaking of economical...while looking at plasma TV's and HD video players the other day, I discovered that they want over a hundred bucks just for the cable that runs between the two units!!! Is that cable made of unobtainium or what? I sense a consumer rip-off, but the nice salesperson assure me of the fact that the quality of the picture is dependent on getting the ex$pensive cable! And I thought avionics stuff was cost intensive! Paul Siegel N4431Z ________________________________ Message 3 _____________________________________ Time: 05:06:25 PM PST US From: "Noel Karppinen" Subject: AeroElectric-List: Battery Contactors I have just started wiring up a Jabiru 3300 installation, which includes a battery contactor. I wanted to test that the basic power wiring was OK before going too far with the wiring, so I connected a bench power supply to the input side of the contactor, and selected the battery position on the master switch. Everything seemed to be working correctly, except that the contactor became quite hot to touch once it had been on for a while. (There was no load on the main bus at this stage, the only current through the contactor was the coil current.) I removed it and replaced it with a second borrowed contactor, with the same result. I also took the contactors out of the aircraft, and checked them on the bench, and again, they became quite hot. Both contactors drew a coil current of about 750 mA. Is it normal for battery contactors to run hot, or have I encountered two faulty contactors? Noel Karppinen ________________________________ Message 4 _____________________________________ Time: 05:27:55 PM PST US Subject: Re: AeroElectric-List: Battery Contactors From: Ron Quillin At 16:59 12/17/2007, you wrote: >Is it normal for battery contactors to run hot, or have I >encountered two faulty contactors? > >Noel Karppinen Do you perhaps have contactors rated for intermittent (starter) service rather than continuous (battery) service? Ron Q. ________________________________ Message 5 _____________________________________ Time: 05:59:32 PM PST US From: "Richard T. Schaefer" Subject: RE: AeroElectric-List: Battery Contactors It's normal for them to be a little too warm to touch. The current is about right. Look at this at a 10W heater. It will get warm! _____ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Noel Karppinen Sent: Monday, December 17, 2007 6:59 PM Subject: AeroElectric-List: Battery Contactors I have just started wiring up a Jabiru 3300 installation, which includes a battery contactor. I wanted to test that the basic power wiring was OK before going too far with the wiring, so I connected a bench power supply to the input side of the contactor, and selected the battery position on the master switch. Everything seemed to be working correctly, except that the contactor became quite hot to touch once it had been on for a while. (There was no load on the main bus at this stage, the only current through the contactor was the coil current.) I removed it and replaced it with a second borrowed contactor, with the same result. I also took the contactors out of the aircraft, and checked them on the bench, and again, they became quite hot. Both contactors drew a coil current of about 750 mA. Is it normal for battery contactors to run hot, or have I encountered two faulty contactors? Noel Karppinen ________________________________ Message 6 _____________________________________ Time: 07:20:21 PM PST US From: BobsV35B@aol.com Subject: Re: AeroElectric-List: Battery Question? Good Evening Bob, Wow!! I had no idea it would take that much effort. I do have a contactor that may work. It is a 6041H189 from a V35B. I'll start gathering the rest of the needed materials. Thanks for all the information. Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator Stearman N3977A Brookeridge Air Park LL22 Downers Grove, IL 60516 630 985-8503 In a message dated 12/16/2007 11:57:29 P.M. Central Standard Time, nuckolls.bob@cox.net writes: Okay, you need to build up a "shop power cart" consisting of two 12v batteries + the HP power supply. I had just such a critter for 1K1 while we owned it. I got a metal "projector cart" on wheels at Sam's Club. Office supply stores have them too. Or you can built it out of wood. I'll suggest that the 18 a.h. RG batteries that you mentioned would be MINIMUM. These will have tabs you can bolt up to. See: **************************************See AOL's top rated recipes (http://food.aol.com/top-rated-recipes?NCID=aoltop00030000000004) ________________________________ Message 7 _____________________________________ Time: 07:27:04 PM PST US From: Kevin Boddicker Subject: Re: AeroElectric-List: ANL 60 Bob and others that responded. Today I was able to get the ANL 60 replaced, and checked the B lead wire. It was indeed touching the firewall and appeared to be grounding out there. Via the aluminum sheet on the FW back to engine ground. I did not fire it up, as it was dark by then and only 20=B0F. If I have further trouble I will post again. Thanks for all the replies. Kevin Boddicker Tri Q 200 N7868B 79.6 hours Luana, IA. On Dec 5, 2007, at 11:54 PM, Robert L. Nuckolls, III wrote: > > > At 05:05 PM 12/5/2007 -0600, you wrote: > >> Bob, >> I have burned two ANL 60 series limiters in six months. I have no >> idea why. >> The circumstances were the same both times though. I had just put >> my engine back on the plane after some maintenance. After start up >> I excite the field. This has been my method to check that the >> alternator is working. Both times the LV light has remained on. >> With no indication of charging. I thought my battery might have >> been low, but putting on the charger this morning indicated not. >> Not a huge deal, but at $20 a copy it is getting old. >> Any suggestions? >> Using a 55 amp DN IR alt. with crowbar OV. > > > If you have 70+ hours on the airplane, do I presume > correctly that the system HAS functioned most of > the time without blowing the limiter? > > Normally, there's but two things that will open > this limiter. (1) hard fault on the alternator > side of the limiter. I.e. shorted diodes in > alternator or shorted wiring between alternator > and b-lead terminal or (2) battery in backwards. > or external battery connected to system is > jumper cabled in backwards. > > If you have an internally regulated alternator > do I also presume correctly that you're using > Z-24 with b-lead contactor as the ov disconnect > scheme? > > Bob . . . > > ________________________________ Message 8 _____________________________________ Time: 07:36:47 PM PST US From: Michael Pereira Subject: RE: AeroElectric-List: Aspen Avionics panel: Too good to be true? > Speaking of economical...while looking at plasma TV's and HD video players the > other day, I discovered that they want over a hundred bucks just for the cable > that runs between the two units!!! Is that cable made of unobtainium or what? > I sense a consumer rip-off, but the nice salesperson assure me of the fact > that the quality of the picture is dependent on getting the ex$pensive cable! > And I thought avionics stuff was cost intensive! Yeah well, the salesperson was just repeating what she was told. Since hdmi is digital the picture either works or it doesn't. I buy the cheapest hdmi and dvi cables I can find. Fyi, sometimes you can walk over to the computer section of the store and find the same cable marketed as a monitor cable for much less money. c'ya, Mike ----- mjpnj@yahoo.com Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ ________________________________ Message 9 _____________________________________ Time: 08:43:09 PM PST US From: "Richard E. Tasker" Subject: Re: AeroElectric-List: Battery Question? Not to knock down Bob's suggestion, but I am not sure that you actually need to go to quite that much trouble. It really depends on what you want to do, how long you want your test batteries to last (both in the sense of supplying power and in the sense of lifetime until they are disposable). What Bob is suggesting would be great if you were to go into the airplane avionics test and installation business. You have to decide how sophisticated you want to get and how much versatility and protection you need. I suspect that what you need is a couple of batteries and a battery charger. Use the batteries to do your testing and then connect them to a charger overnight to be ready the next day. Alternately, just use your 25A supply and forget the batteries. If you do need more than 25A then you would need the batteries, but if not just keep it simple. The HP supply is a good one and should do just fine up to it's maximum load. My $0.02. Do not archive. Dick Tasker BobsV35B@aol.com wrote: > Good Evening Bob, > > Wow!! > > I had no idea it would take that much effort. > > I do have a contactor that may work. It is a 6041H189 from a V35B. > > I'll start gathering the rest of the needed materials. Thanks for all > the information. > > Happy Skies, > > Old Bob > AKA > Bob Siegfried > Ancient Aviator > Stearman N3977A > Brookeridge Air Park LL22 > Downers Grove, IL 60516 > 630 985-8503 > > In a message dated 12/16/2007 11:57:29 P.M. Central Standard Time, > nuckolls.bob@cox.net writes: > > Okay, you need to build up a "shop power > cart" consisting of two 12v batteries + the > HP power supply. I had just such a critter > for 1K1 while we owned it. > > I got a metal "projector cart" on wheels at > Sam's Club. Office supply stores have them > too. Or you can built it out of wood. I'll > suggest that the 18 a.h. RG batteries that > you mentioned would be MINIMUM. These will have > tabs you can bolt up to. See: > > > ------------------------------------------------------------------------ > See AOL's top rated recipes > and > easy ways to stay in shape > > for winter. > * > > > * -- Please Note: No trees were destroyed in the sending of this message. 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