Today's Message Index:
----------------------
1. 05:11 AM - Re: Lowrance 2000C NMEA/DGPS Adapter cable NDC-2 (Eric M. Jones)
2. 05:43 AM - Re: battery chargers (Hopperdhh@aol.com)
3. 08:48 AM - Re: Re: Lowrance 2000C NMEA/DGPS Adapter cable NDC-2 (Richard E. Tasker)
4. 10:08 AM - Re: battery chargers (David)
5. 10:15 AM - Re: battery chargers (David Lloyd)
6. 12:19 PM - Re: battery chargers (earl_schroeder@juno.com)
7. 04:04 PM - Re: battery chargers (David Lloyd)
8. 05:08 PM - Re: battery chargers (Hopperdhh@aol.com)
9. 07:18 PM - Re: Burnouts Arbitrary? ()
10. 07:24 PM - Re: Burnouts Arbitrary? ()
11. 08:53 PM - Coolie Hat Switch ()
Message 1
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| Subject: | Re: Lowrance 2000C NMEA/DGPS Adapter cable NDC-2 |
And maybe:
http://www.marineshop.no/PartDetail.aspx?q=p:10516242
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones@charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=367710#367710
Message 2
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| Subject: | Re: battery chargers |
Hi Bob,
The explosion I mentioned was in reference to a flooded battery, not an
Odyssey. I once put a charger on my tractor and forgot about it. A few
weeks later I found part of the battery case about 10 feet from the tractor.
The rest of the battery was still in the tractor battery box with the
innards showing! I assume that when the electrolyte got below the top of the
plates that some conductive debris shorted between them and set off the
oxygen/hydrogen explosion. This experience has caused me to be leery of battery
tenders. This could happen with even a 1/2 amp charger because the energy
that makes the spark comes from the battery, not the charger.
Thanks for the excellent information in your post on battery chargers.
Dan
RV-7A 766DH
In a message dated 3/3/2012 6:25:21 P.M. Eastern Standard Time,
nuckolls.bob@aeroelectric.com writes:
At 12:29 PM 3/3/2012, you wrote:
Hi David,
I agree with you on the type of battery you mention. Although, I don't
know anything about a $15 tender. If the electrolyte level gets low you can
have an explosion. How do I know that?!!
Let us consider the Odyssey Technical Manual which
may be downloaded from:
_http://www.odysseyfactory.com/documents/US-ODY-TM-001_0411_000.pdf
_ (http://www.odysseyfactory.com/documents/US-ODY-TM-001_0411_000.pdf)
First, I searched for the word "explosion" and didn't find
it.
Next I searched for the word "damage" and I find it
5 times. The word is used 4 times in the context of
mechanical damage to the battery or damage to surroundings
due to leakage.
Message 3
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| Subject: | Re: Lowrance 2000C NMEA/DGPS Adapter cable NDC-2 |
Well, yeah, but if you translate from Norwegian the top yellow box says that this
product is no longer available...
Eric M. Jones wrote:
> --> AeroElectric-List message posted by: "Eric M. Jones"<emjones@charter.net>
>
> And maybe:
>
> http://www.marineshop.no/PartDetail.aspx?q=p:10516242
>
> --------
> Eric M. Jones
> www.PerihelionDesign.com
> 113 Brentwood Drive
> Southbridge, MA 01550
> (508) 764-2072
> emjones@charter.net
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=367710#367710
>
>
--
Please Note:
No trees were destroyed in the sending of this message. We do concede, however,
that a significant number of electrons may have been temporarily inconvenienced.
--
Message 4
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| Subject: | Re: battery chargers |
During charging, offgases are produced. If those gasses collect
somewhere, a spark can indeed set them off. Yes, thay can collect
inside the battery itself. Several RV batteries have been blown up that
way so I assume that it happens all over the place. Happened to me once
and my battery compartment is well ventilated.
David M.
Hopperdhh@aol.com wrote:
> Hi Bob,
> The explosion I mentioned was in reference to a flooded battery, not
> an Odyssey. I once put a charger on my tractor and forgot about it.
> A few weeks later I found part of the battery case about 10 feet from
> the tractor. The rest of the battery was still in the tractor battery
> box with the innards showing! I assume that when the electrolyte got
> below the top of the plates that some conductive debris shorted
> between them and set off the oxygen/hydrogen explosion. This
> experience has caused me to be leery of battery tenders. This could
> happen with even a 1/2 amp charger because the energy that makes the
> spark comes from the battery, not the charger.
> Thanks for the excellent information in your post on battery chargers.
> Dan
> RV-7A 766DH
> In a message dated 3/3/2012 6:25:21 P.M. Eastern Standard Time,
> nuckolls.bob@aeroelectric.com writes:
>
> At 12:29 PM 3/3/2012, you wrote:
> Hi David,
>
> I agree with you on the type of battery you mention. Although, I
> don't know anything about a $15 tender. If the electrolyte level
> gets low you can have an explosion. How do I know that?!!
>
> -------- Original Message --------
> Subject: Re: ACLU: 'Communism is the Goal'
> Date: Sat, 03 Mar 2012 20:14:49 -0900
> From: Storm <runedar@gci.net>
> To: ainut@knology.net
>
>
> Let us consider the Odyssey Technical Manual which
> may be downloaded from:
>
> http://www.odysseyfactory.com/documents/US-ODY-TM-001_0411_000.pdf
>
> First, I searched for the word "explosion" and didn't find
> it.
>
> Next I searched for the word "damage" and I find it
> 5 times. The word is used 4 times in the context of
> mechanical damage to the battery or damage to surroundings
> due to leakage.
>
Message 5
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| Subject: | Re: battery chargers |
Hi Dan,
I am wondering if the issue is confusing the design ideas of a "Tender
or Maintainer" with a garden variety battery charger of the small 0.5
amp (or less) varieties.
Tenders or Maintainers have a pre-set cut off voltage, then set
themselves to a set "float" voltage that is considerably lower than any
battery damage causing charge voltage. Even the tiny Harbor Freight
unit, usually on sale for less than $10, charges to a preset-'able'(*)
limit and then backs off to a float voltage. Once in the float voltage
mode they can be left on indefinitely on any good 12 v. battery.
The old fashion battery chargers, even the low amp units, must be taken
off line in a definite time period or they keep charging past their
labeled charge to usually the peak voltage of the rectified AC. It's
been a while since I thought about this number, but, I think it can go
to about 18 volts. So, case in point, a small 0.5 amp charger could
keep jamming current into an unattended battery until it got to 18
volts. Even, at a small 0.5 amps that battery is going to heat up, gas
out and otherwise possible due weird stuff. I can't see it exploding
without some other form of ignition but, it could certainly gas out and
become useless.....
Dave
(*) The cheap HF maintainers have inside the small plastic control box,
a circuit board mounted potentiometer. The back can be popped off the
box and the float voltage can be adjusted for custom settings. I like
about 13.1 v. for the float charging on 12v. batteries. CW lowers the
voltage and CCW raises it...
-------------------------------------------------------------------------
-------
----- Original Message -----
From: Hopperdhh@aol.com
To: aeroelectric-list@matronics.com
Sent: Sunday, March 04, 2012 5:41 AM
Subject: Re: AeroElectric-List: battery chargers
Hi Bob,
The explosion I mentioned was in reference to a flooded battery, not
an Odyssey. I once put a charger on my tractor and forgot about it. A
few weeks later I found part of the battery case about 10 feet from the
tractor. The rest of the battery was still in the tractor battery box
with the innards showing! I assume that when the electrolyte got below
the top of the plates that some conductive debris shorted between them
and set off the oxygen/hydrogen explosion. This experience has caused
me to be leery of battery tenders. This could happen with even a 1/2
amp charger because the energy that makes the spark comes from the
battery, not the charger.
Thanks for the excellent information in your post on battery chargers.
Dan
RV-7A 766DH
In a message dated 3/3/2012 6:25:21 P.M. Eastern Standard Time,
nuckolls.bob@aeroelectric.com writes:
At 12:29 PM 3/3/2012, you wrote:
Hi David,
I agree with you on the type of battery you mention. Although, I
don't know anything about a $15 tender. If the electrolyte level gets
low you can have an explosion. How do I know that?!!
Let us consider the Odyssey Technical Manual which
may be downloaded from:
http://www.odysseyfactory.com/documents/US-ODY-TM-001_0411_000.pdf
First, I searched for the word "explosion" and didn't find
it.
Next I searched for the word "damage" and I find it
5 times. The word is used 4 times in the context of
mechanical damage to the battery or damage to surroundings
due to leakage.
Message 6
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| Subject: | Re: battery chargers |
Hi Dave,You wrote:"(*) The cheap HF maintainers have inside the small p
lastic control box, a circuit board mounted potentiometer. The back can
be popped off the box and the float voltage can be adjusted for custom
settings. I like about 13.1 v. for the float charging on 12v. batteries
. CW lowers the voltage and CCW raises it..." Unfortunately, the most r
ecent purchases I've made do NOT include the adjustable resistor you men
tioned. They have replaced the 'pot' with a fixed resistor.... One can
find the potentiometers at the usual places (on line) and I've replaced
several fixed resistors already. I've now switched from the HF varieties
to the Walmart ones discussed here. I have one per building and after
the most recent used battery is recharged, I just parallel it with the o
ther 12v batteries in that area. Works good for me! Earl
Message 7
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| Subject: | Re: battery chargers |
Earl,
Interesting that Harbor Freight's little unit has eliminated the pot.
I bought 6 of them last year at Oshkosh (super price) and they all have
pots. Guess I need to be careful with them.
Thanks,
Dave
-------------------------------------------------------------------------
-------
----- Original Message -----
From: earl_schroeder@juno.com
To: aeroelectric-list@matronics.com
Sent: Sunday, March 04, 2012 12:14 PM
Subject: Re: AeroElectric-List: battery chargers
Hi Dave,
You wrote:
"(*) The cheap HF maintainers have inside the small plastic control
box, a circuit board mounted potentiometer. The back can be popped off
the box and the float voltage can be adjusted for custom settings. I
like about 13.1 v. for the float charging on 12v. batteries. CW lowers
the voltage and CCW raises it..."
Unfortunately, the most recent purchases I've made do NOT include the
adjustable resistor you mentioned. They have replaced the 'pot' with a
fixed resistor....
One can find the potentiometers at the usual places (on line) and I've
replaced several fixed resistors already.
I've now switched from the HF varieties to the Walmart ones discussed
here. I have one per building and after the most recent used battery is
recharged, I just parallel it with the other 12v batteries in that area.
Works good for me!
Earl
Message 8
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| Subject: | Re: battery chargers |
I didn't mean to confuse the issue.
My tractor battery that exploded was being charged by a simple 10 A
charger with just a transformer and diodes in it. It probably would not have
happened with a charger/tender/maintainer with some circuitry in it to limit
the float voltage to a reasonable value. My charger was probably putting
out a little current even after the battery charged up to 16 volts or more.
Not a good idea to leave it on charge for several weeks!! It was winter
time and I simply forgot all about it. Glad it wasn't my airplane!
My point was that it is possible to cause big problems if the circuit were
to fail and allow the voltage to go high enough long enough to lose the
electrolyte. Its a good idea to keep a check on the electrolyte level
(assuming a flooded battery) for that reason. I don't like the idea of leaving
the airplane in the hangar 8 miles away with no easy way to check on it
every day or two. Electronics is wonderful -- most of the time. I have
repaired a few pieces of made-in-China electronic junk that I wouldn't trust on
my airplane. I'm thinking of toys and Christmas lights/ornaments, etc. If
the workmanship on the battery tender is like that, forget it!
Dan
In a message dated 3/4/2012 1:16:27 P.M. Eastern Standard Time,
skywagon@charter.net writes:
Hi Dan,
I am wondering if the issue is confusing the design ideas of a "Tender or
Maintainer" with a garden variety battery charger of the small 0.5 amp (or
less) varieties.
Tenders or Maintainers have a pre-set cut off voltage, then set themselves
to a set "float" voltage that is considerably lower than any battery
damage causing charge voltage. Even the tiny Harbor Freight unit, usually on
sale for less than $10, charges to a preset-'able'(*) limit and then backs
off to a float voltage. Once in the float voltage mode they can be left on
indefinitely on any good 12 v. battery.
The old fashion battery chargers, even the low amp units, must be taken
off line in a definite time period or they keep charging past their labeled
charge to usually the peak voltage of the rectified AC. It's been a while
since I thought about this number, but, I think it can go to about 18 volts.
So, case in point, a small 0.5 amp charger could keep jamming current
into an unattended battery until it got to 18 volts. Even, at a small 0.5
amps that battery is going to heat up, gas out and otherwise possible due
weird stuff. I can't see it exploding without some other form of ignition but,
it could certainly gas out and become useless.....
Dave
(*) The cheap HF maintainers have inside the small plastic control box, a
circuit board mounted potentiometer. The back can be popped off the box
and the float voltage can be adjusted for custom settings. I like about
13.1 v. for the float charging on 12v. batteries. CW lowers the voltage and
CCW raises it...
____________________________________
----- Original Message -----
From: _Hopperdhh@aol.com_ (mailto:Hopperdhh@aol.com)
(mailto:aeroelectric-list@matronics.com)
Sent: Sunday, March 04, 2012 5:41 AM
Subject: Re: AeroElectric-List: battery chargers
Hi Bob,
The explosion I mentioned was in reference to a flooded battery, not an
Odyssey. I once put a charger on my tractor and forgot about it. A few
weeks later I found part of the battery case about 10 feet from the tractor.
The rest of the battery was still in the tractor battery box with the
innards showing! I assume that when the electrolyte got below the top of the
plates that some conductive debris shorted between them and set off the
oxygen/hydrogen explosion. This experience has caused me to be leery of battery
tenders. This could happen with even a 1/2 amp charger because the energy
that makes the spark comes from the battery, not the charger.
Thanks for the excellent information in your post on battery chargers.
Dan
RV-7A 766DH
In a message dated 3/3/2012 6:25:21 P.M. Eastern Standard Time,
nuckolls.bob@aeroelectric.com writes:
At 12:29 PM 3/3/2012, you wrote:
Hi David,
I agree with you on the type of battery you mention. Although, I don't
know anything about a $15 tender. If the electrolyte level gets low you can
have an explosion. How do I know that?!!
Let us consider the Odyssey Technical Manual which
may be downloaded from:
_http://www.odysseyfactory.com/documents/US-ODY-TM-001_0411_000.pdf
_ (http://www.odysseyfactory.com/documents/US-ODY-TM-001_0411_000.pdf)
First, I searched for the word "explosion" and didn't find
it.
Next I searched for the word "damage" and I find it
5 times. The word is used 4 times in the context of
mechanical damage to the battery or damage to surroundings
due to leakage.
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
(http://www.matronics.com/Navigator?AeroElectric-List)
(http://www.matronics.com/contribution)
Message 9
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| Subject: | Burnouts Arbitrary? |
Good point. Yes, but it is not connected to the GMA 340. It was about 30 F outside
when this happened with plenty of cool air coming in. I do not have a cabin
heater.
Thanks,
Glenn
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ed Gilroy
Sent: Saturday, March 03, 2012 4:15 PM
Subject: Re: AeroElectric-List: Burnouts Arbitrary?
Is your avionics fan working? Lost a Garmin GPS to that a few years back.
Sent from my iPhone
On Mar 3, 2012, at 10:36 AM, <longg@pjm.com> wrote:
> I have a Garmin 340 which burned up a main board a few weeks ago. Garmin gave
no particular excuse for the failure, so I thought Id throw out the question.
>
> - Is it common for Audio Panels to self destruct? Mine is about 8 years
old and worked normally up to the minute it failed.
> - The repair was flat rate at $600.00 so I dont want to throw it back
in and have it go up in smoke again.
> - Any tests I can perform? I am using 5 amp ATC fuse(s) for power. I
believe that is the recommended size.
> - The audio cables are custom built from Approach Fast Stack and have
not been altered since new.
>
>
> Thanks for the ideas.
>
> Glenn
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> 0
> t
>
>
===================================
===================================
===================================
===================================
>
Message 10
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| Subject: | Burnouts Arbitrary? |
Thanks Bob,
I did not open it up before it went to the shop. Garmin indicated they replaced
the main board in the process. They provided no explanation. I re-installed today
and grounded the case to the grounding forest. I will try a lower fuse size
to see if that creates activity. I never smelled or saw smoke of any sort.
Glenn
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III
Sent: Saturday, March 03, 2012 11:10 AM
Subject: Re: AeroElectric-List: Burnouts Arbitrary?
At 09:36 AM 3/3/2012, you wrote:
>I have a Garmin 340 which burned up a main board a few weeks ago.
>Garmin gave no particular excuse for the failure, so I thought I'd
>throw out the question.
>
>- Is it common for Audio Panels to self destruct? Mine is
>about 8 years old and worked normally up to the minute it failed.
No
>- The repair was flat rate at $600.00 so I don't want to
>throw it back in and have it go up in smoke again.
Did it actually 'smoke' . . . or at least smell bad?
>- Any tests I can perform? I am using 5 amp ATC fuse(s) for
>power. I believe that is the recommended size.
Sure, testing with a small fuse is one useful technique. I
use a current limited power supply for similar explorations.
You can set the short circuit current to any level from a
few milliamps up to full output from the supply. Let's you
explore a circuit's power management condition with little
risk of subjecting it to further damage.
Have you had it open? Can you see any char or signs of
overheating? A experienced bench technician can do the
sniff test and tell whether it's a component or burned
trace .. . but if it's a burned trace . . . it will be
obvious. Smoked integrated circuits can be hard to spot
sometimes.
Bob . . .
Message 11
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| Subject: | Coolie Hat Switch |
Does anyone have a source for a roll your own coolie hat switch?
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