AeroElectric-List Digest Archive

Thu 06/24/10


Total Messages Posted: 6



Today's Message Index:
----------------------
 
     1. 05:03 AM - Re: Audio system design (Robert L. Nuckolls, III)
     2. 05:06 AM - Re: Z Figure Inconsistencies (Robert L. Nuckolls, III)
     3. 05:43 AM - Z Figure Inconsistencies (Gordon Smith)
     4. 08:01 AM - Re: Voltmeter Needs Independent Power Supply (user9253)
     5. 08:43 AM - John Deere AM101406 (Gordon Smith)
     6. 11:03 AM - Re: John Deere AM101406 (Jim Dabney)
 
 
 


Message 1


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    Time: 05:03:21 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Audio system design
    At 02:51 PM 6/23/2010, you wrote: >I have been thinking about the audio system for my 2 place IFR >airplane. Have looked at the audio info presented in Bob's book and >am not sure if the systems depicted will satisfy my >needs/wants. The aircraft will have 2 NAVs, 2 COMs, Glass panel >(GRT EFIS), and GPS, along with a music channel input. > >1. I would like some elaboration on Bob's system, as to advantages >and disadvantages. > >2. Does anyone have any experience with the RST unit? > >Comments, suggestions, helpful hints requested. I'm not sure what you're referring to as a 'system'. I've described a variety of ways in the book and in the instructions for the DIY audio isolation amplifier that offers a wide range of options. Those options will range from one radio and no intercom to a panel full of radios, stereo entertainment . . . and if the companion intercom is so fitted, up to 4 seats. What are YOUR requirements? How many different audio sources do you anticipate? If there are warning signals from the efis and gps systems, then you may need to mix up to 6 different sources with stereo entertainment on top of that. You can add more inputs to the device I've described and it will handle stereo music. There are sources for audio isolation amplifiers that have more inputs also. Which intercom are you looking at? It may have stereo mixing features too and you then may only need a mono-version of the audio isolation amplifier which would provide all the inputs you'll need. So it's not "bob's system" that has advantages/ disadvantages, it's YOUR system that describes design goals that must be met whether you use any data from the 'Connection or any other source. Bob . . .


    Message 2


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    Time: 05:06:27 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Z Figure Inconsistencies
    At 10:15 AM 6/21/2010, you wrote: >I find some inconsistencies regarding E-Bus feeds and I can't >understand the physics that might drive the decision for these >differences. Or are they just items that need to be updated in the future? > Gordon, the answer to your question will take some time and I'm up to my eyeballs in garage sale management for the next three days. I've got your query on the list of things to do. Bob . . . //// (o o) ===========o00o=(_)=o00o======== < Go ahead, make my day . . . > < show me where I'm wrong. > ================================


    Message 3


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    Time: 05:43:29 AM PST US
    From: "Gordon Smith" <gordonrsmith921@yahoo.com>
    Subject: Z Figure Inconsistencies
    RESEND - Originally sent on 21 June. I find some inconsistencies regarding E-Bus feeds and I can't understand the physics that might drive the decision for these differences. Or are they just items that need to be updated in the future? 1. The wire from the E-Bus Alternate Feed Switch (or relay) to the E-Bus: In most cases this wire connects to the E-Bus directly at the bolt, with no protection between the E-Bus bolt and the other end. In two cases it is different. In Z10-8 it connects at the E-Bus through a fuse on the E-Bus. In Z13-8 it connects to the E-Bus bolt through a Fuselink at the bolt. It seems to me that this wire will likely be more than 6 inches (especially when coming from a panel mounted switch). It seems to me that this wire should be protected at the E-Bus when the E-Bus is hot from the Main Bus Feed and the E-Bus Alternate Feed is open. However, I don't know which is the favored method (Fuse or Fuselink). 2. The wire from the Main Bus to the E-Bus main feed Diode: In all cases except one this wire comes directly from the Main Bus Bolt to the Diode, with no protection (in most cases it is marked to be less than 6 inches). In the Z19 figures, this wire comes from the Main Bus through a fuse on the Main Bus and then to the main feed Diode. Is this because it is assumed that this wire will likely be longer than 6 inches? If the E-Bus and Main Bus could be close to each other and the Diode could this wire be as in the other Z figures? Gordon Smith


    Message 4


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    Time: 08:01:23 AM PST US
    Subject: Re: Voltmeter Needs Independent Power Supply
    From: "user9253" <fran4sew@banyanol.com>
    I searched the internet for XL3-20V and found a posting that says it is OK for that meter to share a common ground for the power supply and the input signal. http://tinyurl.com/2eul2xf I would go ahead and connect the power and input pins in parallel and try it out. Even if it smokes, you do not have much to lose. If Futurlec accepts returns, it might not be worth your time and shipping expense to return it. I am guessing that the instructions "must have separate power supply" mean that the meter requires 12 volts to operate, as opposed to some meters that are powered by the input signal. Joe[/quote] -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=302379#302379


    Message 5


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    Time: 08:43:49 AM PST US
    From: "Gordon Smith" <gordonrsmith921@yahoo.com>
    Subject: John Deere AM101406
    I wanted to purchase a JD AM101406 for use as a Voltage Regulator controller for a 20A. PM alternator installation. It has been touted as a "Robust" option for replacement of other regulator units. I made a purchase over the internet and received a unit Identified only as VR-150 Made In China. It has very little cooling fin area as compared to the pictured Stens 435-159 version of the AM101406. Please see attached photos of both units. Should the generic VR-150 be considered an adequate substitute for the robust Stens 435-159 unit? I found that there are many internet sources for the Stens unit that are out of stock and will not be reordering, just no longer available. I don't know what this means. Gordon Smith


    Message 6


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    Time: 11:03:26 AM PST US
    From: Jim Dabney <jdabney@rice.edu>
    Subject: Re: John Deere AM101406
    Gordon, I bought an aftermarket regulator that also seemed a bit flimsy. It couldn't handle the current. The result is attached. When it melted, the stench was terrible. I did find in Houston a source (a tractor parts company) for the genuine Kubota part identical to the regulator that came with my Jabiru 2200. Also, I installed a 1" tube coming from the Jabiru cylinder head duct blowing directly on the regulator, and haven't had any more trouble. Jim Dabney Gordon Smith wrote: > > I wanted to purchase a JD AM101406 for use as a Voltage Regulator > controller for a 20A. PM alternator installation. It has been touted > as a Robust option for replacement of other regulator units. > > I made a purchase over the internet and received a unit Identified > only as VR-150 Made In China. It has very little cooling fin area as > compared to the pictured Stens 435-159 version of the AM101406. Please > see attached photos of both units. > > Should the generic VR-150 be considered an adequate substitute for the > robust Stens 435-159 unit? > > I found that there are many internet sources for the Stens unit that > are out of stock and will not be reordering, just no longer available. > I dont know what this means. > > Gordon Smith > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------ >




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