Today's Message Index:
----------------------
1. 05:42 AM - Must-Have Tool Tip ()
2. 08:45 AM - Com 11B (Dave Lammers)
3. 08:52 AM - Com 11B (Dave Lammers)
4. 10:54 AM - Re: Com 11B (Doug McNutt)
Message 1
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| Subject: | Must-Have Tool Tip |
5/30/2009
Hello Matt, Thanks for your tool tip. Here is another tip that you can
distribute to the RV people if you will (I am not on their lists).
Where ever possible abandon those abominable Phillips drive machine screws.
Instead use Torx (six lobe) drive machine screws.
Every builder who has done this has thanked me profusely for the suggestion.
Torx drive inserts are readily available and with an electric cordless screw
driver are very quick and effective -- vastly superior to Phillips drive.
You can obtain Torx drive screws in a variety of sizes from Microfasteners.
See here:
http://www.microfasteners.com/catalog/products/SSCFCMXS.cfm
(Note that these flat head screws have a true aviation use 100 degree
countersink angle, not the common hardware store 82 degree countersink
angle)
and here:
http://www.microfasteners.com/catalog/products/SSCSBXS.cfm
'OC' Says: "The best investment we can make is the effort to gather and
understand knowledge."
PS: Thanks again Matt for making the Matronics lists available to us -- they
are of great value.
=============================================
Time: 08:32:38 PM PST US
From: Matt Dralle <dralle@matronics.com>
Subject: RV12-List: Must-Have Tool Tip...
Dear Listers,
I don't know, maybe everyone but me already knew about this little gem of a
tool,
but in case you missed it, I thought I share. If you don't have one of
these,
run - don't walk - down to your local Home Depot or Ace Hardware store and
get one! All of those #8 screws in the RVs are a giant pain to work in and
out
and some are just impossible to get to. I've been using this little guy on
the RV-8 project and can't image not having it now. The bendable shaft is
really
strong and you can bend the heck out of it without impacting the torque.
Its about $13 at Home Depot which is a great deal considering how handy it
is.
Here's a link to it on the Ace Hardware web page. I also attached a picture
of
mine attached to my Dewalt electric screw driver.
http://www.acehardware.com/sm-eazypower-flex-a-bit-plus-eazypower-flex-a-bit-plus--pi-2467822.html
Best regards,
Matt Dralle
RV-8 #82880 N998RV
Message 2
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Does anyone know what pin 6 of J401A of the Narco Com 11B is?
My pin out drawing shows "N/C". However, the aircraft installation I am
working with has a wire at that location which I cannot figure out where
it goes.
I am removing the 11B and replacing it with a different unit.
Thanks is advance
Dave Lammers
Message 3
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Does anyone know what pin 6 of J401A of the Narco Com 11B is?
My pin out drawing shows "N/C". However, the aircraft installation I am
working with has a wire at that location which I cannot figure out where
it goes.
I am removing the 11B and replacing it with a different unit.
Thanks is advance
Dave Lammers
Message 4
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At 10:45 -0500 5/30/09, Dave Lammers wrote:
>
>Does anyone know what pin 6 of J401A of the Narco Com 11B is?
>My pin out drawing shows "N/C". However, the aircraft installation I am working
with has a wire at that location which I cannot figure out where it goes.
>I am removing the 11B and replacing it with a different unit.
On the COM11A pin 6 of J401A is called PHONES & SPEAKER GND.
It is internally connected to the case of the unit. It looks like a possible way
to limit ground noise in audio systems caused by audio frequency currents in
the airframe. Check to see if the speaker or the phone jacks are insulated from
airframe ground and wired to return current to pin 6.
And. . . A COMM 11 B might be different.
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