I would go to the archives and check the info out there. I built, using resistors
and (expensive) Radio Shack components, Dew Heaters made out of resistors wired in
various combinations of parrallel and series for my:

1. 5" Refractor objective
2. 90mm Guidescope objective
3. 8x30 finderscope
4. Adjustable eyepeice heater

with all cables, wiring, connectors, resistors, 4 way homemade distribution box and
the selectable power box controller (which adapts 12v to 12v, 9v, 6v and 4.5 v
selectable) all for about $50 which can be a lot less if you shop around for the
stuff. That is the price of one commercial heater without the controller.

All the info to make this is in the archives.
m.

Philip Freeman wrote:

> I also priced out wire and did some calculations. Buy the heaters, but build
> the controller. If you still want wire, one place I found was Amp-something,
> but I can't find the page now. It was a small web site, but gave a phone number
> to request a catalogue. As far as what wire to use, figure out what power you
> want and the voltage you plan to use, and the length of the wire. From that
> calculate the resistance needed. Alternatively Kendrick publishes the amps that
> his heaters draw full on (he calls them amp hours, but I'm pretty sure he means
> amps) and you could size acordingly.
>
> Phil Freeman
>
> Ron Levandoski wrote:
> >
> > I have an LX200 and here in Minnesota, there is a small problem with dew
> > :>((.A while back, I remember reading a post that discussed Nichrome
> > wire for use as a dew heater. A vendor was mentioned that had this wire
> > available in various gauges and resistances. Does anyone remember the
> > website for the wire manufacturer? Can anyone make a suggestion as to
> > the exact wire, length of wire and the appropriate voltage to use on a
> > 10" LX200?
> >
> > Thanks
>
> I priced out all the parts and decided that I should buy the Orion Dew
> Zapper instead.

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