Today's Message Index:
----------------------
1. 05:12 AM - Re: ICOM A 210 matched with a Flightcom 403 intercom (Robert L. Nuckolls, III)
2. 06:57 AM - Re: Ground power cart protection (Robert L. Nuckolls, III)
3. 03:22 PM - D-sub jackscrews for 90 degree shell (rparigoris)
4. 04:24 PM - Blown fuse annunciator circuit (Keith Burris)
5. 04:33 PM - Re: Blown fuse annunciator circuit (RGent1224@aol.com)
6. 07:19 PM - Re: Blown fuse annunciator circuit (Robert L. Nuckolls, III)
7. 07:22 PM - Re: D-sub jackscrews for 90 degree shell (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: ICOM A 210 matched with a Flightcom 403 intercom |
At 04:14 PM 6/10/2010, you wrote:
>
>Bob: Ten days or so ago you answered my question about the ability
>for these 2 to work together. I have installed both, and one thing I am
>not sure of is that when doing to the menu and setting the volume on
>the transciever, I am not able then after getting out of menu to do
>any changing to volume except to use the volume controls on my Lightspeed
>headsets. The volume control on the Flightcom 403 works to control volume
>just between my passenger and I guess thats how its supposed to be.
I think that's correct. Sounds like there's
some operational function yet to be mastered
in the Icom -or- perhaps it has some kind of
problem.
Bob . . .
Message 2
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| Subject: | Re: Ground power cart protection |
>Any other ideas? I've tried labeling the cart, posting warnings,
>educating everyone who uses the cart...I think I need a hardware solution.
Dave,
I've pondered your question without much success.
There are too many variables. The MOST important
variables include whether or not a good battery is
connected to the system getting ground power -AND-
how many electro-whizzies are energized on the
system at the time ground power is applied.
I think you're stuck with the same functional
problem that gave rise to a host of flight
line ops mistakes that run the gamut from
fueling of piston airplanes with Jet-A down to
waving a departing aircraft to the taxi ramp while his
nose wheel chocks are still in place.
I think it's that "situational awareness" thingy
we pilots are so fond of talking about. Its
value extends far outside the cockpit.
Bob . . .
Message 3
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| Subject: | D-sub jackscrews for 90 degree shell |
Hi Bob
I like your idea for DIY jack-screws made out of hex standoffs.
For most part i can use that concept to make for easier access on some kind of
hard to reach connectors.
I however have one 50 pin D-sub going into the bottom of my instrument module on
the port side that has wires exiting aft at 90 degrees. The wires block access
to aft screw.
Any ideas on how to deal with aft screw that is blocked by wires?
We tried to order various clothes pin pinch opened style security devises, and
metal wire bales, but they are on back order for 120 days. Not certain they will
work. Slim pickings for 50 pin 90 degree shells, the one we decided on allows
for an extended front jack-screw. On aft securing screw perhaps there is 1/2"
from the hole on D-sub to wires exiting at 90 degrees right over screw.
Thx.
Ron Parigoris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=300962#300962
Message 4
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| Subject: | Blown fuse annunciator circuit |
Bob and all;
I have uploaded a picture of an idea I have for a blown fuse annunciating
circuit. The circuit would have to be duplicated for each fuse monitored. It
was uploaded at 5PM MDT on 6-11, so it may or may not be there when you read
this. Id like for someone to tell me if Im on the right track here or
completely out in left field. The idea is that the light would stay on as
long as the fuse is blown, regardless of which position the equipment power
switch is in. All comments welcome. Thanks in advance.
P.S. This will also be a test of how easy, hard, simple, etc of uploading
attachments
-- Keith
Message 5
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| Subject: | Re: Blown fuse annunciator circuit |
Why not just use "Smart Glow FUSE" "It glows when it blows" and save weig
ht
Just inquiring minds
Dick
In a message dated 6/11/2010 6:25:40 P.M. Central Daylight Time,
klburris@frontiernet.net writes:
Bob and all;
I have uploaded a picture of an idea I have for a blown fuse annunciating
circuit. The circuit would have to be duplicated for each fuse monitored.
It was uploaded at 5PM MDT on 6-11, so it may or may not be there when yo
u
read this. I=99d like for someone to tell me if I=99m on the
right track here
or completely out in left field. The idea is that the light would stay on
as
long as the fuse is blown, regardless of which position the equipment
power switch is in. All comments welcome. Thanks in advance.
P.S. This will also be a test of how easy, hard, simple, etc of uploading
attachments
-- Keith
Message 6
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| Subject: | Re: Blown fuse annunciator circuit |
At 06:18 PM 6/11/2010, you wrote:
>Bob and all;
>I have uploaded a picture of an idea I have for a blown fuse
>annunciating circuit. The circuit would have to be duplicated for
>each fuse monitored. It was uploaded at 5PM MDT on 6-11, so it may
>or may not be there when you read this. I'd like for someone to tell
>me if I'm on the right track here or completely out in left field.
>The idea is that the light would stay on as long as the fuse is
>blown, regardless of which position the equipment power switch is
>in. All comments welcome. Thanks in advance.
One idea behind the fuseblocks was the low cost
and labor for offering lots of protected feeders
from a bus . . . eliminating current or future
situations where multiple systems have to share
a single protected feeder. It's true that circuit
breakers offer a visual indication of having tripped . . .
but of what value? While airborne, what value is
there in knowing that gizmo (1) has stopped working
because the power is removed due to overloaded
breaker or (2) has stopped working for dozens of
other reasons that do not trip the breaker?
If any device becomes non-functional, the likelihood of
putting it back in service by replacing a fuse or
resetting a breaker is nearly zero. If any failure
presents an extra ordinary task for comfortable return
to earth, THAT system needs a backup . . . a plan-B.
Once you're on the ground, how difficult is it
to confirm whether or not the fuse has opened on
any one system? It's a 30 second test with your
multimeter. How often do you expect to troubleshoot
a potentially blown fuse? I can share that in 1000+
hours of time in little airplanes, I've had TWO
breaker tripping events. One was the alternator B-lead
breaker . . . DESIGNED to nuisance trip. The other
was power to the audio distribution amplifier . . .
shorted transistors. NO recovery possible by resetting
the breaker. How often do you find it necessary to
find a popped fuse in your lifetime experience driving
cars? I've had a less than a hand-full in 50+ years.
Haven't had one in over 20 years.
So what's the return on investment for putting blown
fuse indicators on all your present and future fuses?
Are all the new wires protected? Is there some other
task on your project that would benefit from expenditure
of $time$, talent, weight, space and other resources
on your airplane? Finally, have you considered the
use of fuses with built-in indicators?
http://www.escience.ca/hobby/RENDER/0001/2065/3099/11978.html
Bob . . .
Message 7
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| Subject: | Re: D-sub jackscrews for 90 degree shell |
At 05:19 PM 6/11/2010, you wrote:
><rparigor@suffolk.lib.ny.us>
>
>Hi Bob
>
>I like your idea for DIY jack-screws made out of hex standoffs.
>
>For most part i can use that concept to make for easier access on
>some kind of hard to reach connectors.
>
>I however have one 50 pin D-sub going into the bottom of my
>instrument module on the port side that has wires exiting aft at 90
>degrees. The wires block access to aft screw.
>
>Any ideas on how to deal with aft screw that is blocked by wires?
>
>We tried to order various clothes pin pinch opened style security
>devises, and metal wire bales, but they are on back order for 120
>days. Not certain they will work. Slim pickings for 50 pin 90 degree
>shells, the one we decided on allows for an extended front
>jack-screw. On aft securing screw perhaps there is 1/2" from the
>hole on D-sub to wires exiting at 90 degrees right over screw.
Only thing that comes immediately to mind is make a LONG
extended screw with a smooth, round spacer and bring
it right through the bundle. You can put a hex head on
the end after it passes through the wire bundle.
Consider too tying a plastic bushing of some kind
into the bundle such that the wires don't ride
directly on the jackscrew. A piece of nylaflo tubing
would work.
Bob . . .
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