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where to get a chordless hair dryer?

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16 years 11 months ago #56184 by fguihen
where to get a chordless hair dryer? was created by fguihen
I have been searching for the last 2 weeks for a chordless hairdryer to de-dew my scope. i have searched hardware stores, stores for womens beauty goods, car stores( as some screen defrosters are similar to hair dryers). I just cannot find it anywhere. do any of you guys use one and if so, where did you get it from?

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16 years 11 months ago #56186 by jmcc5
Replied by jmcc5 on topic Re: where to get a chordless hair dryer?
Not sure if this is what your looking for. It's a 12V Dew Remover Gun and works off the power pack for the scope.


www.telescope-service.com/OrionUSA/acces...cessories.html#Foehn

Joanna
Cork Astronomy Club

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16 years 11 months ago #56196 by Seanie_Morris
Replied by Seanie_Morris on topic Re: where to get a chordless hair dryer?

Not sure if this is what your looking for. It's a 12V Dew Remover Gun and works off the power pack for the scope.


www.telescope-service.com/OrionUSA/acces...cessories.html#Foehn


Now, if you can also get that to run off a set of 9V batteries, you'd be laughin'!

fguihen,
all you really need it a fast air current to blow across your objective if you do not have a (Kendrick-or-similar) heater to wrap around the tube. It won't keep dew/frost away for as long as the heater, but it is cheaper/easier to run. For small aperture scopes, a USB fan (like what you might plug into a laptop, and it has a bend/flex arm) will run from 4.5 volts for a very long period of time.

Midlands Astronomy Club.
Radio Presenter (Midlands 103), Space Enthusiast, Astronomy Outreach Co-ordinator.
Former IFAS Chairperson and Secretary.

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16 years 11 months ago #56199 by fguihen
Replied by fguihen on topic Re: where to get a chordless hair dryer?
so the air doesnt need to be heated?? cool ( nice pun there!)

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16 years 11 months ago #56202 by bertthebudgie
Replied by bertthebudgie on topic Re: where to get a chordless hair dryer?
Hi

I did look into the hair dryer route as a method of defeating the dreaded dew. The main disadvantage of them as I saw it was;

1) They take an enormous amount of power to run, anything up to fifteen amps. If you are running off a battery in the field you will find that a hairdryer will suck the power down pretty good.

2) They are only a temporary solution and dew will begin to form again almost immediately afterwards.

3) They have been known to crack the corrector plate if too much heat is applied.

Thats why I personally opted for dew strips in the end. Some brands now draw as little as 1.5 amps even at full power and I find they will stop dew forming all night long even at half that power.

Just my humble opinion though :D

DB

Eqipment
Lx90 8' SCT, UHC Narrowband filter
SPC900 Webcam, Atik 16ic
Astrozap Dew Heater
Meade eyepieces & barlows 9,26 and 32mm
Moonfish 32mm 2"
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"Always pass to the man in space"

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16 years 11 months ago #56205 by fguihen
Replied by fguihen on topic Re: where to get a chordless hair dryer?
do dew strips just literally fit around the curcumference of the scope on the corrector plate end? i have never saw any so want to know how they are fitted etc.

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