Dew Heaters

15 years 3 months ago #9136 by dmcdona
Dew Heaters was created by dmcdona
Folks - anyone got any feedback on dew heaters? Being a victim of foreshortened observing sessions, I think I should invest...

I heard Kendricks are very good...

Dave

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15 years 3 months ago #9138 by astroguy
Replied by astroguy on topic Re: Dew Heaters
I have a Kendrick set and they work great. But since i have found this site and their prodiucts are vey similar but cheaper:
store.yahoo.com/yhst-1469288697390/dewheaters.html

Have fun

LX 200 GPS, Williams optics 80mm APO, Meade LPI, Canon 300D, Skymap pro, Lunar phase pro, Image plus, Exploradome.

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15 years 3 months ago #9141 by larrylart
Replied by larrylart on topic Re: Dew Heaters
yip. Kendrick with Dew Buster - cloudynights.com/accessories2/dewbuster.htm - a perfect combination.

Larry

_______
larryo.org

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15 years 3 months ago #9142 by gnason
Replied by gnason on topic Re: Dew Heaters

Folks - anyone got any feedback on dew heaters? Being a victim of foreshortened observing sessions, I think I should invest...I heard Kendricks are very good...Dave



Dave,

Well, I'm glad you changed the first version of your post!

Kendrick dew heaters are excellent but you could make your own for less money. I made one for my SCT which works well. Can't recall what plans I used as it was some years ago but here's a couple of links. Radionics or Peats can supply the components.

obs.nineplanets.org/dp/dewpower.html
webhome.idirect.com/~rsnow/resister.html

Gordon

Gordon

SDAS

Stargazer am I
It seems that I was born
to chart the evening sky

Mark Knopfler - Sailing to Philadelphia

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15 years 3 months ago #9145 by dmcdona
Replied by dmcdona on topic Re: Dew Heaters
Gordon - thought I'd deleted that quick enough for no-one to see it... :oops:

Hope it wasn't a Freudian slip!

Thanks for the links - will follow them up!

Dave

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15 years 3 months ago #9158 by michaeloconnell
Replied by michaeloconnell on topic Re: Dew Heaters
Dew heaters are a MUST if you have a schmidt/mak type scope. I got mine from Telescope House in the UK and it's fine.

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15 years 3 months ago #9168 by dave_lillis
Replied by dave_lillis on topic Re: Dew Heaters
I find that they work fine on medium size SCTs pretty well,
I have a 12" and find that I must use a dew shield with the kendrick heater, and even at that, I eventually get dewed up.
SO I bought an adjustable power fan heater which I use to clear the plate when dew comes, it ruins viewing for a small while but it does the trick.

Just one thing I found about a dewed corrector plate with an SCT, I find it much easier to collimate the scope like this as the twinkling effect of the atmosphere is blocked out and all you can see are the diffraction pattern in the out of focus star as the image is very still. You need to use vega or some other bright star for this. Give it a try next time you scope fogs up.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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15 years 3 months ago #9173 by markdj
Replied by markdj on topic Re: Dew Heaters
Dewbuster looks great though I went for the BC and F which is equivalent to the Kendrick system. I see BC and F are doing the temperature controlled type too now.


M

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