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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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
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http://forums.matronics.com/viewtopic.php?p=402985#402985
Message 2
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Subject: | Best practices for multi-destination connections |
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
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Message 3
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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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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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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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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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Subject: | Re: 63/37 "Body Solder" |
Sort of like buying a Ferrari to drive on a gravel road...
Very interesting insight Bob.
Message 8
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Subject: | Re: 63/37 "Body Solder" |
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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