---------------------------------------------------------- Avionics-List Digest Archive --- Total Messages Posted Sat 05/30/09: 4 ---------------------------------------------------------- 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 _____________________________________ Time: 05:42:53 AM PST US From: Subject: Avionics-List: 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 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 _____________________________________ Time: 08:45:32 AM PST US From: Dave Lammers Subject: Avionics-List: Com 11B 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 _____________________________________ Time: 08:52:51 AM PST US From: Dave Lammers Subject: Avionics-List: Com 11B 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 _____________________________________ Time: 10:54:00 AM PST US From: Doug McNutt Subject: Re: Avionics-List: Com 11B 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. -- --> Life begins at ovulation. Ladies should endeavor to get every young life fertilized. <-- ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message avionics-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Avionics-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/avionics-list Browse Digests http://www.matronics.com/digest/avionics-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.