AeroElectric-List Digest Archive

Mon 03/12/12


Total Messages Posted: 9



Today's Message Index:
----------------------
 
     1. 07:40 AM - Joining 'coax' cable (JOHN TIPTON)
     2. 08:37 AM - Re: Joining 'coax' cable (Jay Hyde)
     3. 09:02 AM - Re: ShopGoodwill.com (Paul Millner)
     4. 09:05 AM - Re: Joining 'coax' cable (Tim Andres)
     5. 09:44 AM - Re: ShopGoodwill.com ()
     6. 02:13 PM - Re: Re: Jabiru 3300 Over Voltage (Robert L. Nuckolls, III)
     7. 02:19 PM - Re: Joining 'coax' cable (Robert L. Nuckolls, III)
     8. 02:23 PM - Re: Coolie Hat Switch (Robert L. Nuckolls, III)
     9. 06:42 PM - Re: Jabiru 3300 Over Voltage (Wingrider)
 
 
 


Message 1


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    Time: 07:40:49 AM PST US
    From: JOHN TIPTON <jmtipton@btopenworld.com>
    Subject: Joining 'coax' cable
    Hi Guys (Bob)=0A-=0AI will be completing the wiring to out RV9a prior to moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires fro m the landing light, nav light etc to be conntected inside the fuse when th e wings are mounted with connectors, what do I-do about about the 'coax' for the strobe light - in an ideal world I guess one continous lead, but ca n I join two lengths of 'coax' together, what connector do I-use, so as n ot to compromise the integrity of the 'coax' sheathing=0A-=0ABest regards =0A-=0AJohn


    Message 2


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    Time: 08:37:37 AM PST US
    From: "Jay Hyde" <jay@horriblehyde.com>
    Subject: Joining 'coax' cable
    The easiest is to terminate the co-ax with a normal BNC connector, say a male one, at the point where the fuselage/ wing join is and then put a corresponding female BNC connector on the wing side of the co-ax. If you want to get fancy, use a chassis mounted male connection on the fuselage side and then the wing side plugs into that and no further support is required at that point. To be able to use BNC connectors the strobe 'co-ax' would have to have similar dimensions to that of an antenna cable however. If that is not the case you can use simple faston type crimp connectors. Since the impedance of the strobe 'co-ax' is not that important (because it is actually just a shielded cable and not a true co-axial cable in an RF sense) you simply terminate the shield and core to insulated crimp lugs and affect the connection using these. Just keep the 'tails' of the shield and core short. Having the core 'outside' of the shield for a short distance (3-6 inches) will not matter as long as there are not any other sensitive cables running next to it right there. Two pin AMPHENOL type, or similar MOLEX connectors will also do the job well (see http://za.rs-online.com/web/p/connector-accessories/2468414/?searchTerm=2468 414&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E2 66C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B367D247C5E5C647B377D247C5 E5C647B31307D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D4245522 67573743D323436383431342677633D4E4F4E4526) Jay From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of JOHN TIPTON Sent: 12 March 2012 04:35 PM Subject: AeroElectric-List: Joining 'coax' cable Hi Guys (Bob) I will be completing the wiring to out RV9a prior to moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires from the landing light, nav light etc to be conntected inside the fuse when the wings are mounted with connectors, what do I do about about the 'coax' for the strobe light - in an ideal world I guess one continous lead, but can I join two lengths of 'coax' together, what connector do I use, so as not to compromise the integrity of the 'coax' sheathing Best regards John


    Message 3


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    Time: 09:02:28 AM PST US
    From: Paul Millner <millner@me.com>
    Subject: Re: ShopGoodwill.com
    Seems like there'd only be a tax deduction to the extent you pay MORE than something is worth. If you're getting goods for what they're worth, or presumably much less, no deduction. Of course, you can claim whatever pleases you... but that wouldn't be sound accounting practice. Paul On 3/9/2012 4:21 PM, Eric M. Jones wrote: > it's all tax deductible (I think) -- Please note my new email address! millner@me.com


    Message 4


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    Time: 09:05:06 AM PST US
    Subject: Re: Joining 'coax' cable
    From: Tim Andres <tim2542@sbcglobal.net>
    Male/Female BNC connectors sealed in shrink tube. Or get fancy and install a BNC bulkhead connector in the wing root or simila r location. Tim Sent from my iPad On Mar 12, 2012, at 7:35 AM, JOHN TIPTON <jmtipton@btopenworld.com> wrote: > Hi Guys (Bob) > > I will be completing the wiring to out RV9a prior to moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires from the landing light, n av light etc to be conntected inside the fuse when the wings are mounted wit h connectors, what do I do about about the 'coax' for the strobe light - in a n ideal world I guess one continous lead, but can I join two lengths of 'coa x' together, what connector do I use, so as not to compromise the integrity o f the 'coax' sheathing > > Best regards > > John > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= >


    Message 5


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    Time: 09:44:19 AM PST US
    From: <longg@pjm.com>
    Subject: ShopGoodwill.com
    I seems to me if you sell for profit, something someone gave you for free (and you are a non-profit), you are generating taxable income which would be disallowed/taxable unless you re-invested that income into the process you have established the 401c for in the first place. Education, save the world and so on. If that's the case then my purchase goes into the not-for-profit folder which supports Goodwill's save-the-world operation which is a tax free deduction for me. If my purchase goes towards Jet-A for Goodwill's Citation or dinner for the execs and their lovely wives, that may be bending the rules. All depends on whether their policy is to provide a tax deductible receipt for the purchase. Either way, there is plenty of dirt to go around in America and giving money away is still 1 of the best tax deductions out there. Be generous, Glenn -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Paul Millner Sent: Monday, March 12, 2012 12:01 PM Subject: Re: AeroElectric-List: ShopGoodwill.com Seems like there'd only be a tax deduction to the extent you pay MORE than something is worth. If you're getting goods for what they're worth, or presumably much less, no deduction. Of course, you can claim whatever pleases you... but that wouldn't be sound accounting practice. Paul On 3/9/2012 4:21 PM, Eric M. Jones wrote: > it's all tax deductible (I think) -- Please note my new email address! millner@me.com


    Message 6


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    Time: 02:13:59 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Jabiru 3300 Over Voltage
    At 07:01 PM 3/11/2012, you wrote: Thanks for the response Bob. I know I'm getting an over voltage event because is trips the 5 amp breaker in the over voltage circuit and it's hot to the touch, plus I can see the voltage increase on the EFIS most of the time, otherwise reviewing the recorded EFIS data (1 second increments). The breaker is hot to the touch? The EFIS display shows a bus voltage on the same order as that which the OV module is designed to stand off . . . i.e. 16 volts or more? What are your 'normal' voltage readings? This happened once early in phase 1 but has progressed to where it will happen multiple times per flight now. If I keep the landing lights on I can prevent the event. Do you have a wiring diagram of how things are hooked up with wire sizes and all? One curious change, it used to take a few minutes for the breaker to cool off before it would reset. Since I moved the yellow IGN wire from the OV relay to the battery positive terminal when the voltage increases and trips the OMV I can toggle the alternator switch and immediately bring the alternator back online. Hmmmm . . . breaker that has been tripped by a triggered OVM shouldn't warm up to the touch at all. In other words, that breaker carries only relay current . . . about 0.15 amps. The current spikes to many tens of amps during a crowbar event thus opening the alternator breaker in a heartbeat . . . to fast for it to accumulate any perceivable temperature rise. What kind of breaker is it? I have replaced the OVM14 and the voltage regulator and haven't eliminated the problem. Any help would be appreciated. Need to see your wiring diagram along with a narrative of voltages you're observing during 'normal' or 'trip free' operations. Bob . . .


    Message 7


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    Time: 02:19:35 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Joining 'coax' cable
    At 09:35 AM 3/12/2012, you wrote: Hi Guys (Bob) I will be completing the wiring to out RV9a prior to moving the wings, and 'fuse' to the hanger, while I'm Ok with the wires from the landing light, nav light etc to be conntected inside the fuse when the wings are mounted with connectors, what do I do about about the 'coax' for the strobe light - in an ideal world I guess one continous lead, but can I join two lengths of 'coax' together, what connector do I use, so as not to compromise the integrity of the 'coax' sheathing Strobe lights are not wired with coax . . . but 3-wire shielded cable. You can break this cable for the purpose of inserting a connector but it would be better just to disconnect the wire at the power supply and pull the 'stub' out of the fuselage. If you DO put a connector in, use a 4 pin connector (white nylon mate-n-lock or waldom-molex) http://www.radioshack.com/product/index.jsp?productId=2103250 and treat the shield connections just as you would a 4th wire. Bob . . .


    Message 8


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    Time: 02:23:10 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Coolie Hat Switch
    Subject: devices on the relay deck From: Janet Amtmann <jgamtmann2@gmail.com> Bob, What are the 5 devices in each channel of your prelim design of the relay deck? They look like a mixing bowl balanced on a marble laid on the side. You can reply on the List. Thanks Jurgen Amtmann Those are 2-input NAND gates, (Two HIs gets you a LO, any LO gets you a HI) I use the CD4093 quad 2-input a lot in these applications. The part numbers for all the devices will be included on the final iteration. Bob . . .


    Message 9


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    Time: 06:42:15 PM PST US
    Subject: Re: Jabiru 3300 Over Voltage
    From: "Wingrider" <rwhitt3@hotmail.com>
    Bob my wiring diagram is attached to my message about 3 above this one. I've attached a chart of of two flights, one about a year ago where you can see a pretty steady 14 volts and a more recent flight where you see the very fast spikes to 15 plus volts. Other charts/datasets show spikes up to 16 volts and a more drastic swings. Hope this helps. -------- Rich Whittington Tullahoma, TN Zenith 601HDS Corvair 3 Liter 120HP Read this topic online here: http://forums.matronics.com/viewtopic.php?p=368320#368320 Attachments: http://forums.matronics.com//files/voltage_comparison_107.pdf




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