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

["Jim Janusz" <jjanusz@dc.rr.com>]

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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