[MLB-WIRELESS] AP Box cooling

[Weeties]

Woops, forgot about that one, also spiders, insects, dust, I thought
afterwards

I was feeling a bit cold earlier, must have been trying to attract some heat
cheers all

----- Original Message ----- 
From: "Dean Collins" <dean at collins.net.pr>
To: "Weeties" <tymmo at adsl.on.net>; <melbwireless at wireless.org.au>
Sent: Friday, October 03, 2003 5:45 PM
Subject: RE: [MLB-WIRELESS] AP Box cooling


> Wont that allow condensation to form inside the box because it is no
longer
> airtight? (I don't have an external ap so I don't know how airtight these
> boxes are in the first place).
>
> Dean
>
> -----Original Message-----
> From: owner-melbwireless at wireless.org.au
> [mailto:owner-melbwireless at wireless.org.au]On Behalf Of Weeties
> Sent: Friday, 3 October 2003 5:30 PM
> To: melbwireless at wireless.org.au
> Subject: Re: [MLB-WIRELESS] AP Box cooling
>
> Hey all,
> wow! Soooo much trouble
>
> Why not just insert a 90 degree PVC bend facing downwards at the bottom
side
> of the box (i.e. on the side, not the bottom, but the bottom side)and one
at
> the top. (4 if need be) Available at any hardware and in many sizes.
Silicon
> them in and you've got convection cooling, and rainproof
> Probably look a bit like a moon landing module, but cheap and easy. Hide
'em
> by painting the flat black. (Don't start about the heat, they're outside
the
> box)
> Sometimes there's just too much brain power in this mailing list
>
> cheers
> ----- Original Message -----
> From: "Gizi" <gizi at iinet.net.au>
> To: <melbwireless at wireless.org.au>
> Sent: Friday, October 03, 2003 5:08 PM
> Subject: Re: [MLB-WIRELESS] AP Box cooling
>
>
> > Hi,
> >
> > There are a few reasons why this may not work, a solar light is off
during
> > the day and on at night, it therefore has the entire daylight period to
> > charge (probably into some low loss capacitor or such).  During night
when
> > on the 'battery' is used to light the LED's not the solar cell.
> >
> > Now most LED's require bugger all power, 0.02A @ 3.5V (=> 0.07Watts), my
> > guess would be that the solar cell built into these is a lot less
> powerful,
> > guessing say 0.01Amps @ 3.5V => 0.035Watts.
> >
> > The lowest power consuming fan I have seen (quick look) is 80mA (or
0.08A)
> > at 12V => 0.96Watts, as you can see you would need a lot of solar lights
> to
> > power the fan, even at 25% six lights under optimal conditions.
> >
> > However if you picked up one of those $25 solar cells from tricky
dickies,
> > 12V at 0.07A you might just squeeze some rotation out of your fan under
> good
> > conditions (ie direct sunlight, the right angle, etc, etc).
> >
> > But all in all why make life any more complicated than it needs to be,
you
> > have to get voltage up to the box to power the AP so spend the extra
bucks
> > on a 12V power pack, a 5V regulator and just tap the raw 12V.  If you
want
> > to get real tricky buy a light activated switch kit to turn your fan
> on/off
> > as needed.
> >
> > Mark
> >
> >
> > ----- Original Message -----
> > From: "Gordon Staines" <gstaines at theage.com.au>
> > To: <melbwireless at wireless.org.au>
> > Sent: Friday, October 03, 2003 3:50 PM
> > Subject: Re: [MLB-WIRELESS] AP Box cooling
> >
> >
> > > And here am I thinking that a small fan at the bottom, power by one of
> > > those cheap solar panels from dick smith.
> > >
> > > The solar reason: The fan would run fastest when there was the most
heat
> > > - ie direct sunlight. and be off at night (when we use AP the most,
> > > hence less noise from the motor) also when its generally not too light
> > > when its raining and cold
> > >
> > > Also can get those solar powered garden lights which have a mount, are
> > > weather proof etc, it wouldnt take much to take the light out and
retro
> > > fit one, and they cost under $25 at bunnings
> > >
> > > cheers
> > >
> > > G
> > >
> > >
> > > darrend at ndpgroup.com.au wrote:
> > >
> > > >Mike would keep it cool by launching it into orbit (from the Hawthorn
> > > >Aerospace launch site) strapped to the side of a rocket. All the way
> moon
> > > >bouncing the 2.4GHz video footage back to earth, realtime encoded to
5
> > > >simultaneous media streams :P
> > > >
> > > >Darren Dreis
> > > >Vice President
> > > >Melbourne Wireless Inc.
> > > >vicepresident at wireless.org.au
> > > >http://www.wireless.org.au
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >Michael Borthwick <holden at netspace.net.au>
> > > >Sent by: owner-melbwireless at wireless.org.au
> > > >03/10/2003 11:33 AM
> > > >
> > > >
> > > >        To:     melbwireless at wireless.org.au
> > > >        cc:
> > > >        Subject:        Re: [MLB-WIRELESS] AP Box cooling
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >>Steven wrote:
> > > >>
> > > >>Has anyone added a cooling system to their AP box?
> > > >>
> > > >>
> > > >
> > > >There are a couple of ways of approaching this depending on your
> > > >point-of-view.
> > > >
> > > >Darren would install the entire AP into a slotted waveguide and use
> that
> > > >as an enormous ventilated heatsink.
> > > >
> > > >Vak would run Liquid Nitrogen over Ethernet (LNoE) using specially
> > > >reinforced and insulated CAT-5 cable containing glass fibre capillary
> > > >tubes terminated with blue anodized aerospace connectors.
> > > >
> > > >Clae would install a peltier effect cooling module from Oatley
> > > >Electronics powered by an array of ex-Telstra solar panels suspended
> > > >from a balloon filled with hydrogen created by electrolysis from a
> > > >converted Kombi alternator that doubles as an arc welder.
> > > >
> > > >Tony would point out that your cooling problems are trivial compared
to
> > > >those that hams fans running ATV in the same part of the band who
could
> > > >wipe your signal out any time they wanted too.
> > > >
> > > >Rick would have a BBQ and pour beer over it.
> > > >
> > > >To unsubscribe: send mail to majordomo at wireless.org.au
> > > >with "unsubscribe melbwireless" in the body of the message
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> >
>
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