Re: [Texascavers] headlamp

[Charles Loving via Texascavers]

Yeah! He is back.

On Tue, Nov 29, 2016 at 2:19 PM, David via Texascavers <
texascavers@texascavers.com> wrote:

> It seems only fair to critique Mr. Kunath's post as he nostalgically
> critiques the newbie Texas Caver articles.
>
> However, I am retired from arm-chair caving and no longer burdened with
> such trivialities.
>
> I am now annoying Linux desktop users worldwide and have developed a
> similar reputation in that arena.   The development team of Mageia in
> France unknowingly welcomed me into their fold, and are now scratching
> their heads trying to figure out how to get rid of me.
> But one of them must like me, or they would have kicked me out by now.
>
> Below is a summary from past post on the headlamp topic aimed at newbie
> cavers:
>
> All focus lights have a tiny gap between the lens housing and the body
> housing.   Cheap lights have a bigger gap and no seal.   So water and dirt
> will get in and ruin things easily.Fancy lights have a quality
> tolerance and rugged machined materials with a silicone o-ring.Water
> and dirt still gets in and the o-ring will eventually need to be cleaned
> and lubricated and maybe even replaced.Better to not use those in super
> muddy caves.
>
> Most AAA headlamps are not suitable for a primary light source on a real
> caving trip.   4 AA is preferable, unless you can afford a specialized
> battery.
>
> All of the high-powered LEDs need a way to dissipate the heat.The
> cheap lamps will eventually fail.Better not use them for a primary
> headlamp.
>
> Unless you plan to camp in the cave, you should not have to change your
> batteries in the cave.   But that still means you need a backup plan and an
> emergency plan.
>
> It appears now that all the active cavers are mounting 2 or 3 or even 4
> small LED lights on their helmets.
>
> It would seem there is a now an excellent opportunity for a creative caver
> to build a modern fibreglass or ABS plastic or Kevlar or carbon-fiber
> caving helmet designed for multiple headlamps.
>
> See you all at the next NSS Convention.I doubt I will go anywhere
> before that.
>
> David Locklear
>
> P.S.   My Sequoia has not be repossessed yet.
>
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>
>


-- 
Charlie Loving
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[Texascavers] UT Grotto Meeting - Dec 7

[Aubri Jenson via Texascavers]

Greetings, cavers!

This week Wednesday we have a guest speaker, Dr. Weston Nowlin, an
ecologist at Texas State University! He'll talk on how the selective
pressures of subterranean environments result in unique physical and
behavioral adaptations, using examples from amphipods in central Texas.

The presentation portion of the grotto meeting will be live streamed via
Periscope https://www.periscope.tv/utgrotto at approximately 8:30pm CST
(the actual time will be announced via Twitter @UTGrotto).
***

The meeting is at 7:45pm in Burdine 116. Follow this link to a map of where
the building is located on the University of Texas campus:
http://www.utexas.edu/maps/main/buildings/bur.html


For information on Underground Texas Grotto activities, please see
www.utgrotto.org

Before the meeting, gather at the Taco Join on San Jacinto Blvd. This is
the best place to park and meet folks walking over to the meeting. After
the meeting we continue with the decades long tradition to reconvene for
burgers, beer, and tall tales of caving at Posse East! www.posse-east.com


See you there!
Cheers,
Aubri Jenson
UT Grotto Vice-chair
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