texascavers Digest 20 Nov 2012 14:31:07 -0000 Issue 1666
Topics (messages 21035 through 21045):
Home Again
21035 by: dirtdoc.comcast.net
electronic question - help requested
21036 by: Geary Schindel
21037 by: Logan McNatt
21038 by: George D. Nincehelser
21040 by: Mark Minton
21043 by: Edward Gelsone
Ezell's Cave Preserve work day announcement
21039 by: Saj Zappitello
Re: Rolling Oaks Work Day Thanks! (TCMA)
21041 by: ellie watson
21042 by: Mark Minton
In the Moon - Where the sun don't shine
21044 by: Lee H. Skinner
Paging Fritz Holt
21045 by: Mark.Alman.L-3com.com
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----------------------------------------------------------------------
--- Begin Message ---
We are back home after an excellent trip to the karst of SE Asia. Now dealing
with 5,000 e-mails and 40 pounds of regular mail. If you sent something to me
in the last month that you really want me to read, it would be advisable to
send it again.
DirtDoc
--- End Message ---
--- Begin Message ---
Folks,
Sue and I are heading out camping this Thanksgiving and have a camping/caving
related question for the electronics gurus in the group. Sue has a sleep apnea
machine she uses. We've used a marine battery that has worked for as long as a
week without charging. I checked the amp hour rating of the battery and
compared it to the demands of the machine but I'm not sure I got it right or
was just lucky. On this trip, we're flying out to meet Graham and Aspen and
going camping in Deaf Valley - That's Death Valley, just checking to make sure
you're listening. Flying with a 70 pound marine battery probably isn't a good
idea. Anyway, we were thinking of purchasing a motorcycle battery from Autozone
in a nearby town and was wondering if folks think the battery would last for
three nights without charging.
We use an inverter connected to the battery to power the machine. The machine
is a Resmed. The specs are AC 100-240V 50-60 hz. 110v 400 hz, 2.5 a. DC 12 V
2.5 amp.
I didn't see the DC connection before so I'm wondering if I can get a 12 volt
DC cord. Anyway, I'm not familiar with motorcycle batteries and don't know
whether they are 12 v or 6 volt and how many amp hours they are. Anyone have
some suggestions as to what they do.
Thanks
Geary,
P.S. if you're thinking about breaking into my house and robbing me of my
vintage caving coveralls with real canvas grip patchs (a real collectors item),
we will have a full time housesitter and visiting friend.
--- End Message ---
--- Begin Message ---
Death Valley for Thanksgiving? Does that mean you'll be having turkey vulture
for dinner?
On 11/18/2012 10:37 AM, Geary Schindel wrote:
Folks,
Sue and I are heading out camping this Thanksgiving and have a camping/caving related question for the electronics gurus in the group. Sue has
a sleep apnea machine she uses. We've used a marine battery that has worked for as long as a week without charging. I checked the amp hour
rating of the battery and compared it to the demands of the machine but I'm not sure I got it right or was just lucky. On this trip, we're
flying out to meet Graham and Aspen and going camping in Deaf Valley -- That's Death Valley, just checking to make sure you're listening.
Flying with a 70 pound marine battery probably isn't a good idea. Anyway, we were thinking of purchasing a motorcycle battery from Autozone in
a nearby town and was wondering if folks think the battery would last for three nights without charging.
We use an inverter connected to the battery to power the machine. The machine is a Resmed. The specs are AC 100-240V 50-60 hz. 110v 400 hz,
2.5 a. DC 12 V 2.5 amp.
I didn't see the DC connection before so I'm wondering if I can get a 12 volt DC cord. Anyway, I'm not familiar with motorcycle batteries and
don't know whether they are 12 v or 6 volt and how many amp hours they are. Anyone have some suggestions as to what they do.
Thanks
Geary,
P.S. if you're thinking about breaking into my house and robbing me of my vintage caving coveralls with real canvas grip patchs (a real
collectors item), we will have a full time housesitter and visiting friend.
--- End Message ---
--- Begin Message ---
I'm on the road so I can't give a detailed answer, but Resmed has an online
guide for battery sizing.
http://www.resmed.com/us/assets/documents/service_support/battery_guide/198103_battery-guide_glo_eng.pdf
Let me know if you need more help and I'll look closer when I hit a motel. I'm
familiar with CPAP and Resmed.
George D. Nincehelser
Sent from my iPhone
On Nov 18, 2012, at 10:37 AM, Geary Schindel <gschin...@edwardsaquifer.org>
wrote:
> Folks,
>
> Sue and I are heading out camping this Thanksgiving and have a camping/caving
> related question for the electronics gurus in the group. Sue has a sleep
> apnea machine she uses. We’ve used a marine battery that has worked for as
> long as a week without charging. I checked the amp hour rating of the
> battery and compared it to the demands of the machine but I’m not sure I got
> it right or was just lucky. On this trip, we’re flying out to meet Graham
> and Aspen and going camping in Deaf Valley – That’s Death Valley, just
> checking to make sure you’re listening. Flying with a 70 pound marine battery
> probably isn’t a good idea. Anyway, we were thinking of purchasing a
> motorcycle battery from Autozone in a nearby town and was wondering if folks
> think the battery would last for three nights without charging.
>
> We use an inverter connected to the battery to power the machine. The
> machine is a Resmed. The specs are AC 100-240V 50-60 hz. 110v 400 hz, 2.5
> a. DC 12 V 2.5 amp.
>
> I didn’t see the DC connection before so I’m wondering if I can get a 12 volt
> DC cord. Anyway, I’m not familiar with motorcycle batteries and don’t know
> whether they are 12 v or 6 volt and how many amp hours they are. Anyone have
> some suggestions as to what they do.
>
> Thanks
>
> Geary,
>
> P.S. if you’re thinking about breaking into my house and robbing me of my
> vintage caving coveralls with real canvas grip patchs (a real collectors
> item), we will have a full time housesitter and visiting friend.
--- End Message ---
--- Begin Message ---
Geary,
Since the amperage is the same (2.5) for
both 110 v and 12 v, my guess is the machine is
running on 12v and has an internal transformer to
cut down mains voltage. That being the case, it
would be rather inefficient to use an inverter to
raise 12 v to 110 only to cut it back down to
12. Much better to get the 12-volt cord and run
directly off of the battery. Most modern
motorcycles are 12 volt. You'd need to know the
amp-hour rating of the battery to calculate how long it would last.
An easy way to keep your motorcycle or
car battery charged in the field is with a
briefcase solar panel like this one
<http://www.amazon.com/S-1116-12V-Briefcase-Solar-Generator/dp/B0018SC1SW>.
I have used such a panel coupled to a car battery
on a two-week caving trip to Mexico where we were
completely off the grid. The panel kept the
battery charged the entire time, and we charged
many things off of it (caving lights, drill
batteries, GPS, walkie talkies, etc.), including
some that needed an inverter. Any motorcycle
battery should work well coupled with such a
solar panel, which should work especially well in Death Valley.
Mark
At 11:37 AM 11/18/2012, Geary Schindel wrote:
Folks,
Sue and I are heading out camping this
Thanksgiving and have a camping/caving related
question for the electronics gurus in the group.
Sue has a sleep apnea machine she uses. Weve
used a marine battery that has worked for as
long as a week without charging. I checked the
amp hour rating of the battery and compared it
to the demands of the machine but Im not sure I
got it right or was just lucky. On this trip,
were flying out to meet Graham and Aspen and
going camping in Deaf Valley Thats Death
Valley, just checking to make sure youre
listening. Flying with a 70 pound marine battery
probably isnt a good idea. Anyway, we were
thinking of purchasing a motorcycle battery from
Autozone in a nearby town and was wondering if
folks think the battery would last for three nights without charging.
We use an inverter connected to the battery to
power the machine. The machine is a
Resmed. The specs are AC 100-240V 50-60
hz. 110v 400 hz, 2.5 a. DC 12 V 2.5 amp.
I didnt see the DC connection before so Im
wondering if I can get a 12 volt DC cord.
Anyway, Im not familiar with motorcycle
batteries and dont know whether they are 12 v
or 6 volt and how many amp hours they
are. Anyone have some suggestions as to what they do.
Thanks
Geary,
P.S. if youre thinking about breaking into my
house and robbing me of my vintage caving
coveralls with real canvas grip patchs (a real
collectors item), we will have a full time housesitter and visiting friend.
Please reply to mmin...@caver.net
Permanent email address is mmin...@illinoisalumni.org
--- End Message ---
--- Begin Message ---
Just a point here.
Don't travel with a lead acid motorcycle battery. Heavy and must remain
upright.
There are many suitable Gel Cells out there with the voltage and current
capacity you need.
Even though your power supply says it will give you 2.5 amps at 12 volts DC,
you need to research your actual CPAP and what settings you use. Some will
actually use less than an Amp and your sizing requirements can be very much
altered from settings that actually use more current.
I am a CPAP user and I have options for heated vapor on my humidifier and I
use a rather high pressure setting. (BAD SINUSES, BAD) Most motorcycle
batteries are rated at about 12 AMP hours. Drawing an actual 2.5 AMPs at
12Volts DC would mean the battery is really a one night unit. If your
actual draw is about an amp, that same battery will most likely last the
three day trip.
Solar chargers are good but pricey, Solar power is not really worth $69 for
a 13 watt charger. You can pick up a 40 watt panel for not much $$$ and
make your own.
I have a Solar power system on my house and I Love the cheaper electric
bills and I know I am least doing my part. Check out any of the ZILLIONs of
web resources for panels even eBay and you can set up a charger in a
heartbeat. Much more capacity and not much money. Get a Gel Cell with tabs
and set up the DC supply to just plug and go.
I have several "lay around" panels from 20 to 240 Watt laying around. I
have tried several types and layouts until I settled on my large array.
Check eBay for whatever you feel you need.
Ed
From: Geary Schindel [mailto:gschin...@edwardsaquifer.org]
Sent: Sunday, November 18, 2012 10:38 AM
To: texascavers@texascavers.com
Subject: [Texascavers] electronic question - help requested
Folks,
Sue and I are heading out camping this Thanksgiving and have a
camping/caving related question for the electronics gurus in the group. Sue
has a sleep apnea machine she uses. We've used a marine battery that has
worked for as long as a week without charging. I checked the amp hour
rating of the battery and compared it to the demands of the machine but I'm
not sure I got it right or was just lucky. On this trip, we're flying out
to meet Graham and Aspen and going camping in Deaf Valley - That's Death
Valley, just checking to make sure you're listening. Flying with a 70 pound
marine battery probably isn't a good idea. Anyway, we were thinking of
purchasing a motorcycle battery from Autozone in a nearby town and was
wondering if folks think the battery would last for three nights without
charging.
We use an inverter connected to the battery to power the machine. The
machine is a Resmed. The specs are AC 100-240V 50-60 hz. 110v 400 hz, 2.5
a. DC 12 V 2.5 amp.
I didn't see the DC connection before so I'm wondering if I can get a 12
volt DC cord. Anyway, I'm not familiar with motorcycle batteries and don't
know whether they are 12 v or 6 volt and how many amp hours they are.
Anyone have some suggestions as to what they do.
Thanks
Geary,
P.S. if you're thinking about breaking into my house and robbing me of my
vintage caving coveralls with real canvas grip patchs (a real collectors
item), we will have a full time housesitter and visiting friend.
--- End Message ---
--- Begin Message ---
Cavers, we need your help! The Texas Cave Management Association (TCMA) will
be having a work day to spruce up one of our properties, the Ezells Cave
Preserve in Hays County. We plan to prune limbs, cut weeds, haul off junk, and
just generally make the property more attractive. We need people, saws,
loppers, weed eaters, gloves, and maybe even someone with a trailer willing to
carry all the debris to the landfill. Bring your own drinks and snacks for the
work, but TCMA will treat all volunteers to pizza and drinks after we are done.
The date is Saturday, December 8, 2012. The time to meet is 9:00 am. Meet at
the 1500 block of Brown Street, San Marcos. Cell number for the day:
512-797-3817 (Ron Ralph).
If anyone wishes to enter the cave after the work is completed, the Preserve
Manager has agreed to that. All visitors to the Preserve will be asked to sign
a liability waiver. Please give Ron a call if you get lost or would likemore
details.
Thanks for your support!
Jim Kennedy, TCMA Preserves Chair
512-663-2287
Directions to Ezell’s Cave Preserve
If coming in on IH 35 from the north or south, take exit 202 (Wonder World) and
turn west passing the Valero and go over the railroad tracks.
At the traffic light, turn right on Hunter Road or FM 2439 (north), then left
on Dixon (across from Jack’s Road House), then jog right on Blevin and go past
the Habitat for Humanity houses that back up to TCMA property.
Turn left at the next street (Clara) and left again at the next intersection
(Brown).
Ezell’s Cave Preserve is the first jungle on the left.
-------------------------------------------------------------------------
An alternate route, less complicated is:
Exit IH35 onto Wonder World, go west to traffic light.
Turn north (right) on Hunter Road go to the first traffic light.
Turn west (left) onto Bishop Street and go to the top of the first hill.
Turn south (left) on to Brown Street.
Drive to the end of the street. The property is on the left.
--- End Message ---
--- Begin Message ---
Caver's,
Here is a public link for viewing pleasure:
http://www.flickr.com/photos/67526340@N08/sets/72157632042924701/
17 cavers logged 108 volunteer hours to TCMA!
Thanks cavers for all you do!
Ellie
On Thu, Nov 15, 2012 at 9:27 AM, Mark Minton <mmin...@caver.net> wrote:
> Ellie,
>
> All I get is a blank Facebook page. Does this only work for
> Facebook members, which I'm not? Please post a public link. Thanks!
>
> Mark
>
> At 01:31 AM 11/15/2012, ellie watson wrote:
>
>> Cavers,
>>
>>
>> Photos from 11.10.12: https://www.facebook.com/**media/set/?set=a.**
>> 10151136038709506.446051.**507449505&type=1&l=2676ee6a9b<https://www.facebook.com/media/set/?set=a.10151136038709506.446051.507449505&type=1&l=2676ee6a9b>
>>
>
> Please reply to mmin...@caver.net
> Permanent email address is mmin...@illinoisalumni.org
>
> ------------------------------**------------------------------**---------
> Visit our website: http://texascavers.com
> To unsubscribe, e-mail:
> texascavers-unsubscribe@**texascavers.com<texascavers-unsubscr...@texascavers.com>
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>
>
--- End Message ---
--- Begin Message ---
Thanks, Ellie! That works.
Mark
At 10:49 PM 11/18/2012, ellie watson wrote:
Caver's,
Here is a public link for viewing pleasure:
http://www.flickr.com/photos/67526340@N08/sets/72157632042924701/
17 cavers logged 108 volunteer hours to TCMA!
Thanks cavers for all you do!
Ellie
On Thu, Nov 15, 2012 at 9:27 AM, Mark Minton <mmin...@caver.net> wrote:
Ellie,
All I get is a blank Facebook page. Does this only work for
Facebook members, which I'm not? Please post a public link. Thanks!
Mark
At 01:31 AM 11/15/2012, ellie watson wrote:
Cavers,
Photos from 11.10.12:
https://www.facebook.com/media/set/?set=a.10151136038709506.446051.507449505&type=1&l=2676ee6a9b
Please reply to mmin...@caver.net
Permanent email address is mmin...@illinoisalumni.org
--- End Message ---
--- Begin Message ---
We need this robot in some of our caves too - as long as it leaves
nothing but tread tracks, breaks nothing but records, and kills nothing
but WNS spores.
http://www.nature.com/news/roaming-robot-may-explore-mysterious-moon-caverns-1.11842
Lee
--- End Message ---
--- Begin Message ---
Hey, Fritz!
Please contact me offline, or, if someone has his email, could you shoot
it to me?
Thank you. Thank very much!
Mark
--- End Message ---
