---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 07/23/07: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:25 AM - Re: DG Short (Charles Brame) 2. 08:19 PM - DIY - In the ear headphones (Ernest Christley) 3. 08:53 PM - ELT Question (Greg Vouga) 4. 09:35 PM - Re: ELT Question (B Tomm) ________________________________ Message 1 _____________________________________ Time: 09:25:48 AM PST US From: Charles Brame Subject: AeroElectric-List: Re: DG Short The DG is a Falcon (Wultrad) model DG02E-3H. Chinese made el cheapo purchased from AirCraft Spruce. Charlie RV-6A N11CB San Antonio ------------------------------------------ > > Time: 11:20:11 PM PST US > Subject: AeroElectric-List: Re: DG Short > From: "Nick1" > > > Charlie, > Could you give please P/N and the manufacturer of your DG? > Nick > ________________________________ Message 2 _____________________________________ Time: 08:19:22 PM PST US From: Ernest Christley Subject: AeroElectric-List: DIY - In the ear headphones I've been looking into building a in-the-ear type headset using low-end earphones, following the example given at http://www.canardzone.com/members/nickugolini/CuplessHeadet/cupless_headset.htm I bought the Phillips ANR headphones from Target. I've got Jim Weir's impedance matching circuit article describing how to use the audio transformer, so the headphone portion is in the bag. The hangup is with the microphone. I found some discussions where Jim said that an amplifier is needed to use an electret element. Well, I picked up Item# 270-090 from Radio Shack today. http://www.radioshack.com/product/index.jsp?summary=summary&techSpecs=techSpecs¤tTab=techSpecs&cp=&custRatings=custRatings&features=features&accessories=accessories&productId 62215&support=support&tab=summary It has a wiring diagram on the back of the package that seems to indicate that the single transistor amplifier is already built into the package. I was going to ask if that was in fact what it indicates, and inquire whether it would work with the RST-443 intercom. Then I got antsy and just went and tried it. With only two leads, you know I had to hook it up backwards and feel disappointed for a minute until I figured out to turn the leads around. Then it was "WOOHOO!!" all the way. I'm now well on my way to having the equivalent of a $500, in-the-ear headset, and it's only costing me about $50. (Testing is incomplete, but others have reported resounding success.) ________________________________ Message 3 _____________________________________ Time: 08:53:54 PM PST US From: "Greg Vouga" Subject: AeroElectric-List: ELT Question All, I'm installing a standard Ameri-King AK-450 ELT in my RV-7A to satisfy the FAA. I have a question about the coax wire connection. I need a couple extra feet of cable for my installation. I'm putting the antenna under the tail fairing and the ELT behind the baggage wall. Is it a good idea to use RG-400 to make a longer cable? Asside from the obvious "because Ameri-King says not to," is there a reason why this won't work? Maybe it would be necessary to tune the new cable/antenna combination? If so, do I need special equipment? Thanks, Greg _________________________________________________________________ Need a brain boost? Recharge with a stimulating game. Play now! http://club.live.com/home.aspx?icid=club_hotmailtextlink1 ________________________________ Message 4 _____________________________________ Time: 09:35:37 PM PST US From: "B Tomm" Subject: RE: AeroElectric-List: ELT Question Greg, Here's a fast answer. I seem to recall a "best practices" suggestion (don't know if it's a requirement) is to install the ELT, coax and antenna close together WITHOUT passing the antenna cable through any bulkhead. The idea here is that the further they are apart, the more likely that any one of those three critical parts will be damaged in a crash rendering the system useless. Put the whole setup together in the most survivable location. Probably near the tail. Bevan RV7A Not flying yet. -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Greg Vouga Sent: Monday, July 23, 2007 8:53 PM Subject: AeroElectric-List: ELT Question --> All, I'm installing a standard Ameri-King AK-450 ELT in my RV-7A to satisfy the FAA. I have a question about the coax wire connection. I need a couple extra feet of cable for my installation. I'm putting the antenna under the tail fairing and the ELT behind the baggage wall. Is it a good idea to use RG-400 to make a longer cable? Asside from the obvious "because Ameri-King says not to," is there a reason why this won't work? Maybe it would be necessary to tune the new cable/antenna combination? If so, do I need special equipment? Thanks, Greg _________________________________________________________________ Need a brain boost? Recharge with a stimulating game. 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