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Thread: Dew Heater

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    Default Dew Heater



    As you guys and girls will notice this is my first post on the Forum thus i hope this post is in the correct section!

    I am busy building my own dew shield for my 5inch Mak. I would also like to add a heating element to the shield.

    Have anyone adapted a flexible and adjustable reptile heating pad to work as a heating element?

    How many watts will i require for a Konus Motormax 130 ? The scope is a 130 mm (5") Maksutov-Cassegrain telescope with a focal length of 2000 mm (79").

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    Default Re: Dew Heater

    Welcome to the forum. Hopefully someone will be able to help you with your DIY heater project.
    Mark
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    Default Re: Dew Heater

    Hi and welcome to the forums from Durban!

    Sorry I cannot assist with your question, but those in the know will be along to assist you soon.

    Cheers

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    Default Re: Dew Heater

    Quote Originally Posted by MariusR View Post

    Have anyone adapted a flexible and adjustable reptile heating pad to work as a heating element?
    Interesting idea that I hadn't considered.
    Jim
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    Default Re: Dew Heater

    I've seen a few articles about building up heat straps from a bunch of resistors in parallel. Looked like a lot of work espically if your not all that handy with a soldering iron.

    I have been home brewing electronic stuff for decades and even to me it looked like a daunting task to get all those resistors lined up.
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    Default Re: Dew Heater

    Building them from nichrome wire looks easier, but I have no personal experience.

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    Default Re: Dew Heater

    I've used nichrome wire. I simply taped on the insude of my dew sheild on the part that touches the ota.

    You can go to the dew not site and find the specs for the strap for your scope.

    I probably would just skip a dew controller but that is just my experience with my weather

    If I was going to build a dew controller I would use an adjustable dc dc converter rather than the popular pwm circuits
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    Default Re: Dew Heater

    Saw an article around here recently about re-purposing a LED pwm driver.
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    Default Re: Dew Heater

    I gutted one of these for a cheap 3 channel controller.

    http://www.amazon.com/Torchstar-KBDM...lor+led+dimmer

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    Default Re: Dew Heater

    Just to add to the list of considerations, I learned the hard way that not only is a heater needed for the dew shield, but also for the eyepiece.
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