Re: [APML] Home made Dew Shield?

["Bert Katzung" <katzung1@attbi.com>]

Hi People:
I am just coming into this thread, so I may be repeating information, but
here are a couple of good sources for home-made dew zapper information:
http://www.seds.org/billa/dp/dewpower.html
http://users.netconnect.com.au/~taylor19/workshop.htm
http://webhome.idirect.com/~rsnow/scopeheater.html

Source of nichrome heating wire in rolls:
http://www.omega.com/ppt/pptsc.asp?ref=NI60&Nav=temh03
The temperature/resistance specs for this wire may be found at:
http://www.omega.com/Temperature/pdf/NI60.pdf

Hope this is useful---
Bert

Bert Katzung
katzung1@attbi.com
www.astronomy-images.com

----- Original Message -----
From: "Monte Wilson" <montezinho@bigpond.com>
To: <astro-photo@seds.org>
Sent: Tuesday, August 13, 2002 2:06 PM
Subject: Re: [APML] Home made Dew Shield?


> All I know is the stuff I used is 14ohms per metre. So I guess you might
> want 4ohms per foot. The slightly thicker wire will be easier to work
with.
> I would call them and tell them what you are doing they will have some
> thoughts.
>
>
>
> ----- Original Message -----
> From: "Roland Roberts" <roland@astrofoto.org>
> To: <astro-photo@seds.org>
> Sent: Wednesday, August 14, 2002 5:30 AM
> Subject: Re: [APML] Home made Dew Shield?
>
>
> > >>>>> "Tim" == Tim Hart <Tim.Hart@haworth.com> writes:
> >
> >     Tim> That is VERY cool!  I've even found a supplier!!
> >     Tim> http://www.wholesalepartsandfilm.com/wire.asp
> >
> > Okay, so where do I find specs for Nichrome wire?  In particular, this
> > supplier has wire from 0.032" to 0.040" and some specified as "soft"
> > others as "1/2 hard".
> >
> > Then there is also Nichrome ribbon....
> >
> > I'm assuming there is a resistance value of the form
> > ohms/(cross-section x length)  that I can use to calculate the
> > resistance of my wires....
> >
> > roland
> > --
> >        PGP Key ID: 66 BC 3B CD
> > Roland B. Roberts, PhD                             RL Enterprises
> > roland@rlenter.com                     76-15 113th Street, Apt 3B
> > roland@astrofoto.org                       Forest Hills, NY 11375
> >
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