AeroElectric-List Digest Archive

Wed 06/19/13


Total Messages Posted: 8



Today's Message Index:
----------------------
 
     1. 06:26 AM - FSJ1-50A Cable (user9253)
     2. 07:21 AM - Best practices for multi-destination connections (donjohnston)
     3. 08:21 AM - Re: FSJ1-50A Cable (Robert L. Nuckolls, III)
     4. 08:28 AM - Re: Best practices for multi-destination connections (Robert L. Nuckolls, III)
     5. 03:02 PM - Re: Best practices for multi-destination connections (Dave Saylor)
     6. 06:34 PM - 63/37 "Body Solder" (Robert L. Nuckolls, III)
     7. 09:33 PM - Re: 63/37 "Body Solder" (Sacha)
     8. 09:54 PM - Re: 63/37 "Body Solder" (rparigoris)
 
 
 


Message 1


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    Time: 06:26:19 AM PST US
    Subject: FSJ1-50A Cable
    From: "user9253" <fransew@gmail.com>
    While surfing the internet, I ran across FSJ1-50A cable. Those who recommend it say that this cable has less loss and costs less. But it must have some disadvantages or else it would be in common use. What are the disadvantages of FSJ1-50A cable? Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=402985#402985


    Message 2


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    Time: 07:21:06 AM PST US
    Subject: Best practices for multi-destination connections
    From: "donjohnston" <don@numa.aero>
    I've got my (previously discussed) annunicator panel figured out. Now I'm trying to determine the best way to connect all the different sensors, switches and devices back to the panel. So far, I've come up with a few options: 1) Hardwire everything to the annunicator panel. 2) A single DB-25 which is then split out to all the different destinations. 3) A Molex connectors for each destination. 4) Inline PIDG connectors for each wire. 5) Hardmounted terminals (spade or screw) on the annunicator with PIDG connectors for each wire. Any opinions on which one would be best? Or suggestions for an alternative? Thanks, Don Read this topic online here: http://forums.matronics.com/viewtopic.php?p=402990#402990


    Message 3


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    Time: 08:21:50 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: FSJ1-50A Cable
    At 08:25 AM 6/19/2013, you wrote: > >While surfing the internet, I ran across FSJ1-50A cable. Those who >recommend it say that this cable has less loss and costs less. But >it must have some disadvantages or else it would be in common >use. What are the disadvantages of FSJ1-50A cable? There are dozens of different coax products and the numbers grow every year. FSJ1-50A cable is a 'specialty' product . . . special in that it doesn't integrate well into the high- volume market occupied by the .190" diameter cables that work with equally high-volume tools and connectors. It's a fine cable . . . http://tinyurl.com/mjfvtok but with an o.d. of 0.29" you'll need to acquire matching connectors to be installed without tools . . . or you'll have to buy/ rent/borrow appropriate tools for what's essentially a one-time job on your project. Our cable runs are so short that relative losses for the full range of cable products is insignificant. I'm going to be working with some LMR-195 and evaluating compatibility with our favorite connectors and tools. Bob . . .


    Message 4


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    Time: 08:28:09 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Best practices for multi-destination connections
    At 09:20 AM 6/19/2013, you wrote: > >I've got my (previously discussed) annunicator panel figured out. >Now I'm trying to determine the best way to connect all the >different sensors, switches and devices back to the panel. So far, >I've come up with a few options: > >1) Hardwire everything to the annunicator panel. >2) A single DB-25 which is then split out to all the different destinations. >3) A Molex connectors for each destination. >4) Inline PIDG connectors for each wire. >5) Hardmounted terminals (spade or screw) on the annunicator with >PIDG connectors for each wire. > >Any opinions on which one would be best? Or suggestions for an alternative? You're discovering that a small fraction of the effort is to make it work, the largest fraction is package and install it. In my personal experience . . . anything you can do through a d-sub connector with machined pins is of good value. For bringing flying leads together, the PIDG knife-splice under heat-shrink is an efficient, cost effective joining compatible with common tools. Molex connectors are at the bottom of the barrel for choices . . . bulky and they use b-crimps which are not 'bad' but not the best we know how to do. Bob . . .


    Message 5


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    Time: 03:02:17 PM PST US
    From: Dave Saylor <dave.saylor.aircrafters@gmail.com>
    Subject: Re: Best practices for multi-destination connections
    Machined pins by themselves, without a DB housing, make handy, very small, removable butt connectors. A piece of tight heat shrink will hold the whole thing together. Good or bad, the entire connection disappears in a wire bundle, it's so slim. Also, I recently did an install that needed power to 5 or 6 engine sensors. The sensors are all very low current and fed from a single wire out of the engine monitor, so I used Bob's DB ground block philosophy in reverse: I soldered the wire from the engine monitor to the back terminals of the DB sockets, then distributed that power to the various sensors through the other half of the DB connector. I used the plastic body of the connector to insulate the whole thing. Dave Saylor 831-750-0284 CL On Wed, Jun 19, 2013 at 8:24 AM, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > nuckolls.bob@aeroelectric.com**> > > At 09:20 AM 6/19/2013, you wrote: > >> >> I've got my (previously discussed) annunicator panel figured out. Now I'm >> trying to determine the best way to connect all the different sensors, >> switches and devices back to the panel. So far, I've come up with a few >> options: >> >> 1) Hardwire everything to the annunicator panel. >> 2) A single DB-25 which is then split out to all the different >> destinations. >> 3) A Molex connectors for each destination. >> 4) Inline PIDG connectors for each wire. >> 5) Hardmounted terminals (spade or screw) on the annunicator with PIDG >> connectors for each wire. >> >> Any opinions on which one would be best? Or suggestions for an >> alternative? >> > > You're discovering that a small fraction of the > effort is to make it work, the largest fraction > is package and install it. > > In my personal experience . . . anything you can do > through a d-sub connector with machined pins > is of good value. For bringing flying leads together, > the PIDG knife-splice under heat-shrink is an > efficient, cost effective joining compatible with > common tools. Molex connectors are at the bottom > of the barrel for choices . . . bulky and they > use b-crimps which are not 'bad' but not the > best we know how to do. > > > Bob . . . > >


    Message 6


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    Time: 06:34:31 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: 63/37 "Body Solder"
    Found this interesting offer on eBay . . . Emacs! The product offered is indeed supplied in cast bars just like those used in body shops but if anyone would purchased this item with the notion of doing body work, they would be exceedingly disappointed. Body solder alloys have a large 'plastic' range between solid and liquid. I suspect an alloy like 40/60 would be useful to a body shop. 63/37 has no plastic range. About the time the user thought the solder was ready to mold into the desired shape, it would melt and simply fall on the floor. This solder is, in fact, intended to charge the well of liquid solder that is pumped over a 'wave' for soldering electronics. We got our first wave soldering machine at Electro-Mech about 1978. We would take a week's production of board stuffing and solder them in about an hour. Sounds neat . . . but . . . We had to build racks to hold many hundreds of boards in a ready-to-solder state. The board then needed to be cleaned of the flux oil that was used to protect the surface of the wave. The machine became sort of a bottle neck for production where large quantities of un soldered and cleaned/soldered boards accumulated on both sides. It was not conducive to the way we did business. We had several dozen products of many sizes most of which were on boards too small to solder individually on the machine . . . so another problem presented when we were obliged to lay out multiple boards on a sheet, stuff, solder, clean and then cut them apart. In aviation, you have few customers that want hundreds of parts in a single delivery. More likely a hundred parts is a two or three year supply that gets delivered 6 pieces a month! So effective use of the wave solder machine caused us to invest a lot of $time$ into finished goods inventory that might not move for months. The machine took 6+ hours to set up and a couple of hours to clean up after a run while one hour of time actually soldering product was several weeks worth of product flow. Don't remember what we spent for the machine but I do remember seeing it sit back in a storage area for years after our 'experiment' in labor reduction. There were several hundred pounds of 63/37 bar solder in crates stored beside it. Who ever made the decision to buy would have served the company well by going to see how folks used the machine and figuring out if it was a real 'fit' for us. Bob . . .


    Message 7


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    Time: 09:33:14 PM PST US
    Subject: Re: 63/37 "Body Solder"
    From: Sacha <uuccio@gmail.com>
    Sort of like buying a Ferrari to drive on a gravel road... Very interesting insight Bob.


    Message 8


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    Time: 09:54:08 PM PST US
    Subject: Re: 63/37 "Body Solder"
    From: "rparigoris" <rparigor@suffolk.lib.ny.us>
    Hi Group Here's a guy on Long Island selling 60-40: http://longisland.craigslist.org/tls/3864649406.html For $10 a pound. Ron Parigoris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403026#403026




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