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
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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" <na_derevnu@canada.com>
>
>
> Charlie,
> Could you give please P/N and the manufacturer of your DG?
> Nick
>
Message 2
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Subject: | 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
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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
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Message 4
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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
--> <gmvouga@hotmail.com>
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!
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