Today's Message Index:
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1. 01:07 PM - ICom headset adapter (eschlanser@yahoo.com)
2. 02:04 PM - Re: Re: EFIS brown out protection (Robert L. Nuckolls, III)
3. 06:18 PM - Re: EFIS brown out protection (Paul Eckenroth)
4. 08:21 PM - Re: EFIS brown out protection (Bill Schlatterer)
Message 1
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| Subject: | ICom headset adapter |
I have a hope that the list can help me find or fabricate a replacement for the
headset adapter for my ICom A-5 handheld radio. The problems include an overpriced
replacement available from ICom and the lack of a push to talk switch plug
in the aftermarket headset adapters for electronics.
Thanks, Eric
Sent via BlackBerry from T-Mobile
Message 2
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| Subject: | Re: EFIS brown out protection |
>> Does the Dynon shut down its ability to display
>> voltages below 12.0? What is the significance of
>> knowing a transition across a 12.0 volt threshold?
>>
>>
>> Bob . . .
>
>I *think* that the original point was that with a 'switcher' feeding
>a regulated 13.8v to power the Dynon (being used as an
>engine/general electrical system health monitor), the Dynon wouldn't
>be able to tell the pilot that the bus voltage had begun to fall due
>to alternator or other failures in the electrical system, since
>there's no separate voltage monitor input on the Dynon. The 1st
>notice would be when the switcher drops off-line & everything goes dark.
Duhhh . . . I knew that!
Hmmm . . . putting that much hardware between a perfectly
good battery (ies) to offset a one-time, 50 mS brownout
that occurs before you leave that ground seems like
killing ants with a sledge.
The obvious, stone simple work-around for equipment
not designed to live in the real world of aircraft
is to not fire it up until after the the engine starts.
The second best is to provide a non-cranking battery
to support weak sisters until after engine start.
If your design goals call for an architecture with
dual batteries anyhow, it seems a simple matter to
arrange things so only the main battery is used to
crank the engine.
Once the engine is running then all features of all
appliances can be expected to perform as advertised
without having to make "mental adjustments" as to
the new meaning of any particular display. If
weight, parts count and cost of ownership are
weighty features of your design goals, minimizing
the amount of stuff to be purchased, installed,
maintained and carried around as part of your
empty weight should be carefully considered
for magnitude of added value.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 3
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| Subject: | Re: EFIS brown out protection |
Bob
Thanks for the heads up concerning the solid state contactor. It does
indeed reverse feed when not activated. Does a relay such as S 704-1 act
more like a mechanical switch. Would it be reasonable to activate this
relay using the start switch.
Paul
On Fri, Mar 27, 2009 at 6:33 AM, Bob-tcw <rnewman@tcwtech.com> wrote:
> Paul, One alternative to an auxiliary battery for voltage sag protection
> is a product we developed at TCW Technologies. Intelligent Power
> Stabilizer, IPS, provides regulated power to critical electronics with
> battery voltages ranging from 5-15 volts. This product was specifically
> developed to keep EFIS, GPS and engine monitors up and running during engine
> starting. It weighs less than 1 lb and requires no maintenance. All the
> details are avialable at www.tcwtech.com
>
> Thanks,
> Bob Newman
> TCW Technologies, LLC.
>
>
> ----- Original Message -----
> *From:* Paul Eckenroth <N509RV@eckenroth.com>
> *To:* aeroelectric-list@matronics.com
> *Sent:* Thursday, March 26, 2009 9:33 PM
> *Subject:* AeroElectric-List: EFIS brown out protection
>
> Would an aux battery feed to the E Buss through a solid state contactor
> keep the voltage from sagging if the contactor is energized by the starter
> switch. The E Buss feed from the Main Buss is through a diode.
>
> I will appreciate any facts and/ or opinions,
>
> Paul Eckenroth
> N509RV
>
> *
>
> href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matronics.com/Navigator?AeroElectric-List
> href="http://forums.matronics.com">http://forums.matronics.com
> href="http://www.matronics.com/contribution">http://www.matronics.com/c*
>
> *
>
> *
>
>
Message 4
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| Subject: | EFIS brown out protection |
Bob, just curious, easy to see how it might handle a surge but how does it
handle a voltage sag from a single battery during starting ??
Thanks Bill S
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Bob-tcw
Sent: Friday, March 27, 2009 5:34 AM
Subject: Re: AeroElectric-List: EFIS brown out protection
Paul, One alternative to an auxiliary battery for voltage sag protection is
a product we developed at TCW Technologies. Intelligent Power Stabilizer,
IPS, provides regulated power to critical electronics with battery voltages
ranging from 5-15 volts. This product was specifically developed to keep
EFIS, GPS and engine monitors up and running during engine starting. It
weighs less than 1 lb and requires no maintenance. All the details are
avialable at www.tcwtech.com
Thanks,
Bob Newman
TCW Technologies, LLC.
----- Original Message -----
From: Paul <mailto:N509RV@eckenroth.com> Eckenroth
Sent: Thursday, March 26, 2009 9:33 PM
Subject: AeroElectric-List: EFIS brown out protection
Would an aux battery feed to the E Buss through a solid state contactor keep
the voltage from sagging if the contactor is energized by the starter
switch. The E Buss feed from the Main Buss is through a diode.
I will appreciate any facts and/ or opinions,
Paul Eckenroth
N509RV
href="http://www.matronics.com/Navigator?AeroElectric-List">http://www.matro
nics.com/Navigator?AeroElectric-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
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