Re: [APML] Dry air purging--thanks Joe

[Joe Mize <jmize@globe-net.net>]

Jim

    The cheap pump I bought, having only one outlet, is pretty quiet on its
rubber feet.  12-15 ft away you cannot hear it at all.  I was tempted to get one
of the dual diaphragm pumps but held off.  Maybe the extra diaphragm makes more
noise.  Dunno.

     Yes, I enjoy the night's quiet too.  I'm trying to identify a night time
bird call which I hear a couple times a night/year.  It's not the usual
identifiable bird calls, it is soft and hushed un-owel like...joe  :)

Jim Janusz wrote:

> Just one small comment regarding using desiccant and a pump.  I use a small
> pump to keep the 4x5 TP flat while exposing and it is VERY annoying when
> running.  If you are with friends, be sure to bring some type of sound
> deadening box for the pump.  Otherwise you are liable to ruin the quiet of
> the night for yourself and friends.  Something about tar and feathers?  (G)
>
> Just my two cents.
>
> Jim
>
> ----- Original Message -----
> From: "steve banbury" <banburys@sonic.net>
> To: <astro-photo@seds.org>
> Sent: Monday, September 02, 2002 3:27 PM
> Subject: [APML] Dry air purging--thanks Joe
>
> > Hi Joe--thanks for providing the specific tips on using the drierite
> > setup. It looks perfect for my outings! And there's a hobby shop not far
> from my
> > office so I should be able to get just about everything I need in pretty
> short order.
> >
> > I drop a note and let you know how things work out.
> >
> > Thanks again--Steve
> >
> > Joe Mize wrote:
> >
> > > Steve;
> > >
> > >      If you're building a dry air setup like Herm's you'll need the
> filter.  If
> > > you get one of the Drierite canisters,
> > > http://www.drierite.com/default.cfm?goto_page=page5.cfm it already has a
> filter
> > > built in.    Notice the white line at the top an bottom of the
> desiccant, that's
> > > about 1/4" of cloth-like filter material.
> > >
> > >      The 26800 canister costs only $47.28, a pleasant surprise these
> days.  When I
> > > received mine I was impressed by its quality and heavy construction.
> The
> > > desiccant is spring loaded between the two filter pads and the canister
> is sealed
> > > with an O-Ring.
> > >
> > >      You don't need a high flow rate, just enough to displace the moist
> air in
> > > your camera.  The 26800 canister lasts me at least 7 full nights,
> sometimes 10, in
> > > Central Fla before it needs to be recharged.  To recharge the Drierite
> it takes
> > > 1hrs @ 425deg.  My total cost was about $60, but you can spend more if
> you get
> > > carried away you get with your fittings and air pump.
> > >
> > >      HINT #1:  I used 1/4" RC Airplane Silicon Fuel Line to maintain
> flexibility
> > > in the winter.
> > >      HINT #2:  ACE Hardware soft plastic pipe end covers, seal your
> lines when not
> > > in use...joe  :)
> >
> >
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> >
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--
       "May You Go Among The Imperishable Stars"

                              Joe Mize
                      http://sfo.sciastro.net
                  mailto:jmize@globe-net.net
                       Current Moon Phase
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