Today's Message Index:
----------------------
1. 06:50 AM - Re: batteries (Mark Steitle)
2. 07:47 AM - Re: batteries (Robert L. Nuckolls, III)
3. 08:38 AM - Re: batteries (Mark Steitle)
4. 09:40 AM - Re: KX155 Squelch Question (Robert L. Nuckolls, III)
5. 09:46 AM - Transistor Help (rv6tc)
6. 10:32 AM - GPS 400 hook up questions (Gilles.Thesee)
7. 11:45 AM - Re: Transistor Help (Richard Tasker)
8. 01:06 PM - Re: batteries (mailbox bob at mail.flyboybob.com)
9. 01:44 PM - Re: batteries (Mark Steitle)
10. 02:04 PM - SMART FUSES - toohumit (Fergus Kyle)
11. 02:08 PM - Re: Transistor Help (KITFOXZ@aol.com)
12. 02:33 PM - Dual Battery / Single Alternator (David Schaefer)
13. 02:36 PM - Re: batteries ()
14. 02:52 PM - Re: Transistor Help (RSwanson)
15. 04:05 PM - Garmin GPS 155XL (Bobdeva@aol.com)
16. 04:28 PM - Re: Dual Battery / Single Alternator (Jeffrey W. Skiba)
17. 04:29 PM - Firewall penetration/engine compartment temp issues (owner-aeroelectric-list-server@matronics.com)
18. 04:33 PM - Testing OVM in AC (Rick Fogerson)
19. 05:22 PM - Re: Garmin GPS 155XL (Robert L. Nuckolls, III)
20. 05:27 PM - Re: Dual Battery / Single Alternator (Robert L. Nuckolls, III)
21. 05:33 PM - Re: Testing OVM in AC (Robert L. Nuckolls, III)
22. 05:50 PM - The many faces of RG batteries . . . (Robert L. Nuckolls, III)
23. 07:39 PM - Re: Transistor Help (Robert L. Nuckolls, III)
24. 07:40 PM - Re: batteries (David Carter)
Message 1
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--> AeroElectric-List message posted by: Mark Steitle <msteitle@mail.utexas.edu>
It appears we're comparing apples to oranges here. The Digi-Key site
describes their LC-RD1217P
as a sealed lead-acid battery. The battery at Pegasus is an RG battery. I
believe Bob N. has determined the RG battery to be superior to the
lead-acid type. It has something to do with lower internal resistance
providing more volts to the starter. Seems like that alone would be worth
the extra $19. Although I could be mistaken.
Mark S.
At 10:57 PM 7/22/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: "mailbox bob at
>mail.flyboybob.com" <bob@flyboybob.com>
>
>'Lectric Heads,
>
>I was on DigiKey's web site looking for some connectors for a project I'm
>working on and stumbled across a great deal on batteries. If you're looking
>for an RG battery, check with DigiKey. Their price for the Panasonic
>LC-RD1217P (12Volt 17AH) battery is $36.23 for quantity 1-3 and $31.05 for
>quantity 4-179. MDS' price for the same battery is $58.00. Pegasus Auto
>Racing offers a 12Volt 17AH battery by Storage Battery Systems Inc. for
>$54.99. Looks like DigiKey is today's best price.
>
>Regards,
>
>Bob Lee
>______________________________
>N52BL KR2 Suwanee, GA 30024
>91% done only 51% to go!
>Phone/Fax: 770/844-7501
>mailto:bob@flyboybob.com
>http://flyboybob.com
>
>
Message 2
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--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 08:42 AM 7/23/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: Mark Steitle
><msteitle@mail.utexas.edu>
>
>It appears we're comparing apples to oranges here. The Digi-Key site
>describes their LC-RD1217P
>as a sealed lead-acid battery. The battery at Pegasus is an RG battery. I
>believe Bob N. has determined the RG battery to be superior to the
>lead-acid type. It has something to do with lower internal resistance
>providing more volts to the starter. Seems like that alone would be worth
>the extra $19. Although I could be mistaken.
RG batteries ARE lead-acid batteries . . . just assembled
in a manner much superior to the classic flooded battery.
See:
http://216.55.140.222/articles/battery.pdf
and
http://www.aeroelectric.com/articles/rg_bat.html
Bob . . .
Message 3
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--> AeroElectric-List message posted by: Mark Steitle <msteitle@mail.utexas.edu>
At 09:43 AM 7/23/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
><bob.nuckolls@cox.net>
>
>At 08:42 AM 7/23/2003 -0500, you wrote:
> >--> AeroElectric-List message posted by: Mark Steitle
> ><msteitle@mail.utexas.edu>
> >
> >It appears we're comparing apples to oranges here. The Digi-Key site
> >describes their LC-RD1217P
> >as a sealed lead-acid battery. The battery at Pegasus is an RG battery. I
> >believe Bob N. has determined the RG battery to be superior to the
> >lead-acid type. It has something to do with lower internal resistance
> >providing more volts to the starter. Seems like that alone would be worth
> >the extra $19. Although I could be mistaken.
>
>
> RG batteries ARE lead-acid batteries . . . just assembled
> in a manner much superior to the classic flooded battery.
>
> See:
> http://216.55.140.222/articles/battery.pdf
>
> and
>
> http://www.aeroelectric.com/articles/rg_bat.html
>
> Bob . . .
Bob,
Everything I know about RG batteries I got from the excellent articles on
your web site. I found a short paragraph from the second article (from
Concord Batteries web site) that makes my point much better than I had done
in my initial post.
"Because of the compressed construction, the RG batteries have a much lower
internal resisitance and thus provide greater starting power and faster
recharging, particularly at cold temperatures, than comparable flooded
batteries. Additionally, the AGM provides a much higher degree of support
against shock and vibration than in the older flooded (vented) batteries.
The RG batteries provide electrical performance comparable to nickel-cadium
aircraft batteries without the requirement of a temperature or current
monitoring system.
So, while a bit more costly, the RG battery surely is my first choice.
Mark S.
Message 4
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| Subject: | Re: KX155 Squelch Question |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 12:00 AM 7/22/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: N223RV@aol.com
>
>
>I installed some electronics in my airplane, and it now appears that it is
>causing some interference in my radio. In particular it seems to act just
>like
>the squelch needs to be adjusted on the radio, although I cannot find any
>squelch adjustment. I have King KX-155, it has a pull to test (volume
>knob), but
>that does not adjust the squelch. When I transmit or the tower calls out,
>the
>radio is clear and fine, but when there is no transmissions, there is a ton
>of 'white noise' or static. The noise is exactly the same sound and loudness
>as when I pull to test on the volume knob. It appears to work fine on some
>frequencies, but not on all frequencies.
>
>I have adjusted the squelch on the intercom, but it just appears to set the
>level for the voice activation on the mic, not on the radio. To me it seems
>like I need to adjust the squelch. Is that possible on a KX155, I have an
>older
>radio that is out of warranty so I am not afraid to open it up if there is a
>potentiometer or some way to adjust it.
>
>Any advice would be greatly appreciated.
>Mike Kraus
In days gone by, squelch controls were totally manual and
operated to open an audio gate in the radio when the receiver
detected presence of an incoming signal . . . usually a
monitoring of the automatic gain control signal.
I belive King was the first to internally automate internal
setting of squelch trigger levels . . . modern signal processing
techniques allow a more discriminating deduction of signal to
noise ratios . . . a much more accurate signal detection
means than simply watching for a shift in AGC voltage.
I presume while you observed behavior cited above
that you turned everything else in the airplane off.
If so, this would eliminate the possibility that some
weak signal source in the airplane is opening your
squelch.
Also, be aware that local sources outside
the airplane can cause this effect. Microprocessor
noise from appliances around the shop is one good
example of potential source. Does this happen over
full range of MHz steps that the receiver can tune?
Since you are flying, I presume the problem persists
everywhere. This would be a stronger clue that something
inside the radio is not working correctly.
I'm not familiar with the internal workings of this
radio so I can't tell you if there is an internal
adjustment.
Bob . . .
Message 5
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--> AeroElectric-List message posted by: "rv6tc" <rv6tc@earthlink.net>
I'm trying to make a 12 to 9 volt converter for an ANR headset... I found a
simple schematic on the web, but it requires a transistor that is a ECG/NTE
184. Is there a "RadioShack equivalent"? I checked Digikey's web site and
they didn't have one.
Thanks.
Keith Hughes
RV-6, Finishing
Denver
Message 6
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| Subject: | GPS 400 hook up questions |
--> AeroElectric-List message posted by: "Gilles.Thesee" <Gilles.Thesee@ac-grenoble.fr>
Hi Bob and all,
I'm in the process of designing the interconnect "Y shaped" harness between
an AK 350 encoder, a Becker 4401 XPDR (needs isolation diodes) and a Garmin
GPS 400 (already has internal diodes).
I took my inspiration mainly from Bob's GNS 430 diagrams, and from the
Garmin 400 series installation manual.
Question 1 :
The encoder GND pin(# 15) is connected to the Becker GND pin (#25),
according to their respective installation manuals.
Now what should I do with the "altitude common" pin (# 60) on the GPS ?
Leave it alone ?
Connect it to ground with it's own wire to the firewall ? (The GPS already
has it's ground wire to the firewall)
Connect it to the GND pin at the encoder or at the transponder?
Question 2 :
The GPS connector kit includes some black plastic connector. The
installation manual only mentions :
"the card-edge connector may be used to terminate shield grouds to the 400
series back plate"
What do they mean, and do I need to install this connector, as no shielded
wire is called for in my setup ?
Thanks for your help,
Gilles
Message 7
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| Subject: | Re: Transistor Help |
--> AeroElectric-List message posted by: Richard Tasker <retasker@optonline.net>
As far as a replacement for the ECG/NTE 184, you can really use most any
NPN power transistor. There isn't any way for me to point you to a
selection on Digikey, but if you search for transistors and select
"transistors" in the list you will get a table of criteria to search.
Choose NPN, choose +40 to +80V, choose the amount of current you want
(probably 1 to 15A), choose TO-126, TO-220D and TO-220F. You will get a
page that you can choose from. The main thing you need to do is make
sure that the device has at least double the current capability you need
(more is better).
However, you can avoid a lot of work by just using an LM7809 voltage
regulator. Input of 11.5 to 26V gives 9V output. Uses a couple of
capacitors and the regulator. They have various current output levels
based on the particular package you use - 100 ma to 1.5A. Available on
Digikey - search for 78L09, 78M09 or 7809 to get the one you want.
Dick Tasker
rv6tc wrote:
>--> AeroElectric-List message posted by: "rv6tc" <rv6tc@earthlink.net>
>
>I'm trying to make a 12 to 9 volt converter for an ANR headset... I found a
>simple schematic on the web, but it requires a transistor that is a ECG/NTE
>184. Is there a "RadioShack equivalent"? I checked Digikey's web site and
>they didn't have one.
>
>Thanks.
>
>Keith Hughes
>RV-6, Finishing
>Denver
>
>
>
>
Message 8
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--> AeroElectric-List message posted by: "mailbox bob at mail.flyboybob.com" <bob@flyboybob.com>
Mark,
The apples and oranges are caused by the marketing descriptions, not the
physics as 'Lectric Bob always tells us to observe. If you take a look at
Panasonic's technical description of their VLRA product line you will
discover that they are what we have all been referring to as RG batteries.
It took some digging on the web but I found their documentation at:
http://www.panasonic.com/industrial/battery/oem/images/pdf/Panasonic_VRLA_Ov
erview.pdf
If you look at the top of page 1 they describe the battery construction
including the AGM (Absorbed Glass Mat) technology. In addition, on page 3
they show the chemical formula for the electrolysis process and it is the
exact chemical formula that 'Lectric Bob referenced in his second link
below. I think the $36 DigiKey price for the LC-RD1217P 12V 17AH battery is
a good option for those of us using Z14 with dual batteries.
Regards,
Bob Lee
______________________________
N52BL KR2 Suwanee, GA 30024
91% done only 51% to go!
Phone/Fax: 770/844-7501
mailto:bob@flyboybob.com
http://flyboybob.com
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Mark
Steitle
Subject: RE: AeroElectric-List: batteries
--> AeroElectric-List message posted by: Mark Steitle
<msteitle@mail.utexas.edu>
At 09:43 AM 7/23/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
><bob.nuckolls@cox.net>
>
>At 08:42 AM 7/23/2003 -0500, you wrote:
> >--> AeroElectric-List message posted by: Mark Steitle
> ><msteitle@mail.utexas.edu>
> >
> >It appears we're comparing apples to oranges here. The Digi-Key site
> >describes their LC-RD1217P
> >as a sealed lead-acid battery. The battery at Pegasus is an RG battery.
I
> >believe Bob N. has determined the RG battery to be superior to the
> >lead-acid type. It has something to do with lower internal resistance
> >providing more volts to the starter. Seems like that alone would be
worth
> >the extra $19. Although I could be mistaken.
>
>
> RG batteries ARE lead-acid batteries . . . just assembled
> in a manner much superior to the classic flooded battery.
>
> See:
> http://216.55.140.222/articles/battery.pdf
>
> and
>
> http://www.aeroelectric.com/articles/rg_bat.html
>
> Bob . . .
Bob,
Everything I know about RG batteries I got from the excellent articles on
your web site. I found a short paragraph from the second article (from
Concord Batteries web site) that makes my point much better than I had done
in my initial post.
"Because of the compressed construction, the RG batteries have a much lower
internal resisitance and thus provide greater starting power and faster
recharging, particularly at cold temperatures, than comparable flooded
batteries. Additionally, the AGM provides a much higher degree of support
against shock and vibration than in the older flooded (vented) batteries.
The RG batteries provide electrical performance comparable to nickel-cadium
aircraft batteries without the requirement of a temperature or current
monitoring system.
So, while a bit more costly, the RG battery surely is my first choice.
Mark S.
Message 9
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--> AeroElectric-List message posted by: Mark Steitle <msteitle@mail.utexas.edu>
At 04:05 PM 7/23/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: "mailbox bob at
>mail.flyboybob.com" <bob@flyboybob.com>
>
>Mark,
>
>The apples and oranges are caused by the marketing descriptions, not the
>physics as 'Lectric Bob always tells us to observe. If you take a look at
>Panasonic's technical description of their VLRA product line you will
>discover that they are what we have all been referring to as RG batteries.
>It took some digging on the web but I found their documentation at:
>
>http://www.panasonic.com/industrial/battery/oem/images/pdf/Panasonic_VRLA_Ov
>erview.pdf
>
>If you look at the top of page 1 they describe the battery construction
>including the AGM (Absorbed Glass Mat) technology. In addition, on page 3
>they show the chemical formula for the electrolysis process and it is the
>exact chemical formula that 'Lectric Bob referenced in his second link
>below. I think the $36 DigiKey price for the LC-RD1217P 12V 17AH battery is
>a good option for those of us using Z14 with dual batteries.
>
>Regards,
>
>Bob Lee
>______________________________
>N52BL KR2 Suwanee, GA 30024
>91% done only 51% to go!
>Phone/Fax: 770/844-7501
>mailto:bob@flyboybob.com
>http://flyboybob.com
Bob Lee,
Thanks for the excellent Panasonic reference. I too have done some battery
research since this thread started. The Concord site that Bob referenced
pointed out that these are the same, even though they are called by
different names by the marketing department. Sounds like Digi-Key's price
beats Pegasus by a wide margin. I am planning on ordering one for my
GL1500 Goldwing motorcycle and see how it holds up through the blistering
Texas summers and cold winters. If it survives under those brutal
conditions, then a/c use should be a breeze. Thanks for the tip.
Mark S.
>-----Original Message-----
>From: owner-aeroelectric-list-server@matronics.com
>[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Mark
>Steitle
>To: aeroelectric-list@matronics.com
>Subject: RE: AeroElectric-List: batteries
>
>
>--> AeroElectric-List message posted by: Mark Steitle
><msteitle@mail.utexas.edu>
>
>At 09:43 AM 7/23/2003 -0500, you wrote:
> >--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> ><bob.nuckolls@cox.net>
> >
> >At 08:42 AM 7/23/2003 -0500, you wrote:
> > >--> AeroElectric-List message posted by: Mark Steitle
> > ><msteitle@mail.utexas.edu>
> > >
> > >It appears we're comparing apples to oranges here. The Digi-Key site
> > >describes their LC-RD1217P
> > >as a sealed lead-acid battery. The battery at Pegasus is an RG battery.
>I
> > >believe Bob N. has determined the RG battery to be superior to the
> > >lead-acid type. It has something to do with lower internal resistance
> > >providing more volts to the starter. Seems like that alone would be
>worth
> > >the extra $19. Although I could be mistaken.
> >
> >
> > RG batteries ARE lead-acid batteries . . . just assembled
> > in a manner much superior to the classic flooded battery.
> >
> > See:
> > http://216.55.140.222/articles/battery.pdf
> >
> > and
> >
> > http://www.aeroelectric.com/articles/rg_bat.html
> >
> > Bob . . .
>
>Bob,
>Everything I know about RG batteries I got from the excellent articles on
>your web site. I found a short paragraph from the second article (from
>Concord Batteries web site) that makes my point much better than I had done
>in my initial post.
>
>"Because of the compressed construction, the RG batteries have a much lower
>internal resisitance and thus provide greater starting power and faster
>recharging, particularly at cold temperatures, than comparable flooded
>batteries. Additionally, the AGM provides a much higher degree of support
>against shock and vibration than in the older flooded (vented) batteries.
>The RG batteries provide electrical performance comparable to nickel-cadium
>aircraft batteries without the requirement of a temperature or current
>monitoring system.
>
>So, while a bit more costly, the RG battery surely is my first choice.
>
>Mark S.
>
>
Message 10
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| Subject: | SMART FUSES - toohumit |
--> AeroElectric-List message posted by: "Fergus Kyle" <VE3LVO@rac.ca>
Toohumit Macon sern
Hi
Someone asked about Smart Fuses. I have a pack of
Smart glow Fuses - "the integrated emitting device on the top of the fuse
glows brightly if fuse is blown, u.s. patent 5,598,138 Contains:
7 each - 5,10,15,20, 25 30 amp fuses
Item #14-0000 Asst pack"
Catalina performance Accessories Inc
Mountainburg AR 72946" $29.95 + S&H (fuses are about 3/4"
wide)
- ordered from JC Whitney as Catalog item # 49UB1501R on 08JUN03
Cheers, Ferg
Message 11
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| Subject: | Re: Transistor Help |
--> AeroElectric-List message posted by: KITFOXZ@aol.com
In a message dated 7/23/2003 12:47:02 PM Eastern Standard Time,
rv6tc@earthlink.net writes:
> I'm trying to make a 12 to 9 volt converter for an ANR headset... I found
> a
> simple schematic on the web, but it requires a transistor that is a ECG/NTE
> 184. Is there a "RadioShack equivalent"? I checked Digikey's web site and
> they didn't have one.
>
> Thanks.
>
> Keith Hughes
> RV-6, Finishing
> Denver
>
Hello Keith,
I used to stock a lot of ECG semiconductors in my shop. I just looked and I
don't have an ECG 184 but I do have some ECG 182's. A 182 is rated for over
twice the power handling capability of a 184 and is in a similar case. It
should work just fine for your series regulator circuit. I'll send you one if
you
would like. That should be a fairly simple project to complete and make
work.
John P. Marzluf
Columbus, Ohio
Kitfox Outback (out back in the garage)
Message 12
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| Subject: | Dual Battery / Single Alternator |
--> AeroElectric-List message posted by: "David Schaefer" <dschaefer1@kc.rr.com>
Bob ... do you have a drawing for a dual battery system and a single
alternator with an essential buss that won't tie the batteries together
for starting ala FADEC. I've looked over your site and can't find one.
I've decided not to go with the dual alternator/regulator scenario.
Thanks...
David
Message 13
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--> AeroElectric-List message posted by: <racker@rmci.net>
> --> AeroElectric-List message posted by: Mark Steitle
> <msteitle@mail.utexas.edu>
> Thanks for the excellent Panasonic reference....I am planning on
> ordering one for my GL1500 Goldwing motorcycle and see how it holds up
> through the blistering Texas summers and cold winters. If it survives
> under those brutal conditions, then a/c use should be a breeze.
All of us who are already successfully using these batteries in our
aircraft, and you need a special test <g>? I've been using one in my
plane from below freezing to the current 110F up here in Idaho, no
problems.
Rob Acker (RV-6 flying)
do not archive
Message 14
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| Subject: | Re: Transistor Help |
--> AeroElectric-List message posted by: "RSwanson" <rswan19@comcast.net>
Someone said they were using this for their headset. I have one but
haven't tried it yet.
The part number is in the last line: 20E005. Cheap, too.
http://www.alltronics.com/power_sources.htm
POWER MODULE
Input l2VDC nom. Output 9VDC @ 225mA
max., isolated. PUT Powertech
Ll2SER2509-GP.
20E005 $2.49 each
R
----- Original Message -----
From: "rv6tc" <rv6tc@earthlink.net>
Subject: AeroElectric-List: Transistor Help
> --> AeroElectric-List message posted by: "rv6tc" <rv6tc@earthlink.net>
>
> I'm trying to make a 12 to 9 volt converter for an ANR headset... I
found a
> simple schematic on the web, but it requires a transistor that is a
ECG/NTE
> 184. Is there a "RadioShack equivalent"? I checked Digikey's web site
and
> they didn't have one.
>
> Thanks.
>
> Keith Hughes
> RV-6, Finishing
> Denver
>
>
Message 15
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| Subject: | Garmin GPS 155XL |
--> AeroElectric-List message posted by: Bobdeva@aol.com
Does anyone have copy of the pin-out sheet for the above. Would really
appreciate a copy.
Thanks,
Bob Devaney
Message 16
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| Subject: | Dual Battery / Single Alternator |
--> AeroElectric-List message posted by: "Jeffrey W. Skiba" <jskiba@icosa.net>
I believe that this is important for the Fadec system on Continental,
because I seem to remember a Continental rep saying Not to tie the batteries
together for starting a FADEC system it does something weird.
Anybody hear similar ??
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of David
Schaefer
Subject: AeroElectric-List: Dual Battery / Single Alternator
--> AeroElectric-List message posted by: "David Schaefer"
--> <dschaefer1@kc.rr.com>
Bob ... do you have a drawing for a dual battery system and a single
alternator with an essential buss that won't tie the batteries together for
starting ala FADEC. I've looked over your site and can't find one. I've
decided not to go with the dual alternator/regulator scenario.
Thanks...
David
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Message 17
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--> AeroElectric-List message posted by:
Subject: Firewall penetration/engine compartment temp issues
<26E3EC48949D134C94A1574B2C8946610117B16B@exchange2.slac.stanford.edu>
Bob said:
"Without knowing the details of design and fabrication
on the LSE product, it's not possible to shed any
light on the question. It would be interesting to
get temperature data in the vicinity of the box
and on the surface of the box during your flyoff
phase."
I'd just like to add this: Try to get those temp readings after engine shutdown,
too. Sometimes things that run nice and cool in flight can get very heat-soaked
right after shutdown if they are not properly ventilated.
-Howard Rogers
Message 18
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| Subject: | Testing OVM in AC |
--> AeroElectric-List message posted by: "Rick Fogerson" <rickf@cableone.net>
Hi Bob,
I've got a question on your test setup page describing annual testing of the OVM
in the airplane. In item 6 it says to begin with the master sw off and "open
the alternator field breaker". This sounds like pulling the breaker button out
to open the circuit. Later you close the master sw which pops the CB. Either
opening the field breaker means pushing the button in or there is a step where
you push it in before closing the master sw. Which one?
Thanks, Rick Fogerson
RV3 electrical
Boise, ID
Message 19
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| Subject: | Re: Garmin GPS 155XL |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 07:04 PM 7/23/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: Bobdeva@aol.com
>
>Does anyone have copy of the pin-out sheet for the above. Would really
>appreciate a copy.
found one for gps155/165 but it doesn't mention
the "xl" part. I've posted it at:
http://216.55.140.222/Installation_Data/GPS155-165.pdf
Message 20
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| Subject: | Dual Battery / Single Alternator |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 06:27 PM 7/23/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Jeffrey W. Skiba" <jskiba@icosa.net>
>
>I believe that this is important for the Fadec system on Continental,
>because I seem to remember a Continental rep saying Not to tie the batteries
>together for starting a FADEC system it does something weird.
>
>Anybody hear similar ??
The Aerosance FADEC goes brain-dead at cranking
voltages on some battery combinations. They
recommend an auxiliary power supply in the form
of second battery that is not used for cranking.
You can add a second battery to any system as shown
in Figure Z-30. Use second battery as aux power for
FADEC and don't close the aux battery master until
after the engine starts and alternator is on line.
See my post of 7/9/3 on this topic.
Bob . . .
Message 21
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| Subject: | Re: Testing OVM in AC |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 05:35 PM 7/23/2003 -0600, you wrote:
>--> AeroElectric-List message posted by: "Rick Fogerson" <rickf@cableone.net>
>
>Hi Bob,
>I've got a question on your test setup page describing annual testing of
>the OVM in the airplane. In item 6 it says to begin with the master sw off
>and "open the alternator field breaker". This sounds like pulling the
>breaker button out to open the circuit.
You have to do this so that you can ADD the 6v lantern battery
in series with bus voltage when the master switch comes on.
> Later you close the master sw which pops the CB.
> Either opening the field breaker means pushing the button in or there
> is a step where you push it in before closing the master sw. Which one?
Neither. We're not expecting to open the CB but rather
a fuse which I show in series with the test battery.
Clipping the battery across the open breaker
gives you a handy place to connect the battery. You still need
a fast, fault clearing device (in this case the fuse) to
limit the time that current flows after you hit the OVM
with 18+ volts.
Bob . . .
Message 22
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| Subject: | The many faces of RG batteries . . . |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
The sealed lead acid battery has been with us for about 30
years. It has been marketed under at least this many
names and probably a few more:
Recombinant Gas
Starved Electrolyte
Vent Regulated Sealed Lead Acid
Absorbed Glass Mat
Sealed Lead Acid
The last term has probably become the most popular.
I should probably replace "RG" with "SLA" in the
various writings referring to this technology.
Bob . . .
Message 23
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| Subject: | Re: Transistor Help |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 05:07 PM 7/23/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: KITFOXZ@aol.com
>
>In a message dated 7/23/2003 12:47:02 PM Eastern Standard Time,
>rv6tc@earthlink.net writes:
>
> > I'm trying to make a 12 to 9 volt converter for an ANR headset... I found
> > a
> > simple schematic on the web, but it requires a transistor that is a ECG/NTE
> > 184. Is there a "RadioShack equivalent"? I checked Digikey's web site and
> > they didn't have one.
> >
> > Thanks.
> >
> > Keith Hughes
> > RV-6, Finishing
> > Denver
> >
>
>Hello Keith,
>
>I used to stock a lot of ECG semiconductors in my shop. I just looked and I
>don't have an ECG 184 but I do have some ECG 182's. A 182 is rated for over
>twice the power handling capability of a 184 and is in a similar case. It
>should work just fine for your series regulator circuit. I'll send you
>one if you
>would like. That should be a fairly simple project to complete and make
>work.
Sounds like you're wanting to duplicate a 12 to 9v converter
schematic I found out there on the 'net looking something like
this:
http://216.55.140.222/temp/car912.gif
ANY npn transistor in a TO-220 package will substitute for
the ECG184 in this schematic. Radio Shack Cat # 276-2020
is but one suitable part.
However, if you'd like to take advantage of the superior bus
noise rejection offered by some 3-terminal regulators, consider
the LM317 from National wired like the schematic in the upper
left corner of page 12 of this document:
http://216.55.140.222/Mfgr_Data/National/LM117.pdf
This uses smaller capacitors and depends on the integrated
circuit for active filtering. Instead of the 5K pot
at R2, substitute a fixed resistor of 1500 ohms and you'll
have a fixed, 9v output.
The LM317 and all the parts for this circuit are available
from Radio Shack for about $5.
Bob . . .
Message 24
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--> AeroElectric-List message posted by: "David Carter" <dcarter@datarecall.net>
Anyone in the Houston - Beaumont area of Texas that want to buy 3 to 5 or 6
to ? and get the lower price from Digi-Key?
I live near Beaumont and get to Houston at least once a month and could
distribute to those in Houston, or someone there (more builders) could order
and I could come pick up my 1 or 2.
David Carter
Nederland, Texas
409-722-7259
----- Original Message -----
From: "Mark Steitle" <msteitle@mail.utexas.edu>
Subject: RE: AeroElectric-List: batteries
> --> AeroElectric-List message posted by: Mark Steitle
<msteitle@mail.utexas.edu>
>
> At 04:05 PM 7/23/2003 -0400, you wrote:
> >--> AeroElectric-List message posted by: "mailbox bob at
> >mail.flyboybob.com" <bob@flyboybob.com>
> >
> >Mark,
> >
> >The apples and oranges are caused by the marketing descriptions, not the
> >physics as 'Lectric Bob always tells us to observe. If you take a look
at
> >Panasonic's technical description of their VLRA product line you will
> >discover that they are what we have all been referring to as RG
batteries.
> >It took some digging on the web but I found their documentation at:
> >
>
>http://www.panasonic.com/industrial/battery/oem/images/pdf/Panasonic_VRLA_O
v
> >erview.pdf
> >
> >If you look at the top of page 1 they describe the battery construction
> >including the AGM (Absorbed Glass Mat) technology. In addition, on page
3
> >they show the chemical formula for the electrolysis process and it is the
> >exact chemical formula that 'Lectric Bob referenced in his second link
> >below. I think the $36 DigiKey price for the LC-RD1217P 12V 17AH battery
is
> >a good option for those of us using Z14 with dual batteries.
> >
> >Regards,
> >
> >Bob Lee
> >______________________________
> >N52BL KR2 Suwanee, GA 30024
> >91% done only 51% to go!
> >Phone/Fax: 770/844-7501
> >mailto:bob@flyboybob.com
> >http://flyboybob.com
>
> Bob Lee,
> Thanks for the excellent Panasonic reference. I too have done some
battery
> research since this thread started. The Concord site that Bob referenced
> pointed out that these are the same, even though they are called by
> different names by the marketing department. Sounds like Digi-Key's price
> beats Pegasus by a wide margin. I am planning on ordering one for my
> GL1500 Goldwing motorcycle and see how it holds up through the blistering
> Texas summers and cold winters. If it survives under those brutal
> conditions, then a/c use should be a breeze. Thanks for the tip.
>
> Mark S.
>
>
> >-----Original Message-----
> >From: owner-aeroelectric-list-server@matronics.com
> >[mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Mark
> >Steitle
> >To: aeroelectric-list@matronics.com
> >Subject: RE: AeroElectric-List: batteries
> >
> >
> >--> AeroElectric-List message posted by: Mark Steitle
> ><msteitle@mail.utexas.edu>
> >
> >At 09:43 AM 7/23/2003 -0500, you wrote:
> > >--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
> > ><bob.nuckolls@cox.net>
> > >
> > >At 08:42 AM 7/23/2003 -0500, you wrote:
> > > >--> AeroElectric-List message posted by: Mark Steitle
> > > ><msteitle@mail.utexas.edu>
> > > >
> > > >It appears we're comparing apples to oranges here. The Digi-Key site
> > > >describes their LC-RD1217P
> > > >as a sealed lead-acid battery. The battery at Pegasus is an RG
battery.
> >I
> > > >believe Bob N. has determined the RG battery to be superior to the
> > > >lead-acid type. It has something to do with lower internal
resistance
> > > >providing more volts to the starter. Seems like that alone would be
> >worth
> > > >the extra $19. Although I could be mistaken.
> > >
> > >
> > > RG batteries ARE lead-acid batteries . . . just assembled
> > > in a manner much superior to the classic flooded battery.
> > >
> > > See:
> > > http://216.55.140.222/articles/battery.pdf
> > >
> > > and
> > >
> > > http://www.aeroelectric.com/articles/rg_bat.html
> > >
> > > Bob . . .
> >
> >Bob,
> >Everything I know about RG batteries I got from the excellent articles on
> >your web site. I found a short paragraph from the second article (from
> >Concord Batteries web site) that makes my point much better than I had
done
> >in my initial post.
> >
> >"Because of the compressed construction, the RG batteries have a much
lower
> >internal resisitance and thus provide greater starting power and faster
> >recharging, particularly at cold temperatures, than comparable flooded
> >batteries. Additionally, the AGM provides a much higher degree of support
> >against shock and vibration than in the older flooded (vented) batteries.
> >The RG batteries provide electrical performance comparable to
nickel-cadium
> >aircraft batteries without the requirement of a temperature or current
> >monitoring system.
> >
> >So, while a bit more costly, the RG battery surely is my first choice.
> >
> >Mark S.
> >
> >
>
>
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