Designing and Building a Low Cost Dew Heater System

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  • เผยแพร่เมื่อ 5 ธ.ค. 2024

ความคิดเห็น • 16

  • @seabeepirate
    @seabeepirate ปีที่แล้ว

    Can't wait to do this myself! Another argument against the ladder arrangement is that in it's failure mode it will heat your OTA unevenly because the resisters are in parallel instead of in series. A series resistor is like a chain with the chain breaking if any link is cut. Parallel is like a chain net, if you cut one link there are others still working. Normally redundancy is helpful in electrical circuits but in this case I think not working at all is better than working unevenly.

  • @clarencemumphrey
    @clarencemumphrey 2 ปีที่แล้ว +1

    Where can I get my hands on that spreadsheet? Google gives me an error.

  • @thomasfretz9684
    @thomasfretz9684 2 ปีที่แล้ว +1

    Can’t get the spreadsheet it needs a google account or something I don’t have.

  • @keithkorthals6183
    @keithkorthals6183 4 ปีที่แล้ว

    Easy to make. I did it. I just applied the nichrome wire to duct tape make sure not to short out. Good quality duct tape.

  • @zeroed4x
    @zeroed4x 5 ปีที่แล้ว

    A great presentation, thanks for sharing.

  • @bretthaussmann2068
    @bretthaussmann2068 3 ปีที่แล้ว

    This is fantastic thank you.

  • @NikonJax
    @NikonJax 6 ปีที่แล้ว

    Great presentation! I am working on the controller now :)

  • @Jackcr33
    @Jackcr33 7 ปีที่แล้ว

    Very good information and presentation , I just made a resistor heater for my telrad which I found on the web it is made of a 2 watt 100oHM resistor , I am in Ontario Canada and we get lots of dewy nights

  • @andrepotgieter3722
    @andrepotgieter3722 5 ปีที่แล้ว

    Excellent presentation , build my own complete 4 port system along similar lines for a fraction of the cost of the commercial units.

  • @TheElz8
    @TheElz8 7 ปีที่แล้ว

    the MSPF is in inches (Watts/inch) , with that you calculate the total power (P) needed to defeat dew. Then you use R = V^2/P to calculate the resistance (R) needed. Now, assuming most people dont have a digital multimeter to actually measure the nichrome wire resistance, we use the charts(which show how much resistence per FOOT for a particular gauge of nichrome wire) to calculate the length of wire needed for R (most people have a tape measure or a rule)
    so.. {calc Watts needed} ---> {calc R for the desire Watts} ---> { calc length of wire based on R/FOOT} --->cut the wire, then build the heater based on the guidelines in the presentations.

  • @TheNakism
    @TheNakism 7 ปีที่แล้ว +2

    Is the MSPF you used 0.25/inch or 0.25/foot? The calcs in your exampes use per inch, but the table on the next slide says per foot.

  • @flyvezina
    @flyvezina 4 ปีที่แล้ว

    Nice video and seems easy to make. Does anybody have a recommended parts list? I live in an area where the light pollution is low and with COVID-19 and limit telescope and electronics stores nearby, forcing me to buy online. I like to order everything, so they arrive nearly at the same time. I ordered the 12V DC PWM Manual Knob Dimmer Switches for LED from China and it will take a couple months to receive them. I like to have the parts list, but what I really like to know, what is the size of the housing? Again very informative and eager to build it.

  • @talex001
    @talex001 6 ปีที่แล้ว

    Hi - I tried the spread sheet for this and it does not seem quite right - maybe I missed something - I entered the scope circumference I wanted to make a heater band for (10" Meade SCT) which is 36" and it says 113.1 inches heater element, heating element length 1 feet? .5 up and back? I am using .28 resistance wire and want to several length's and even though I have gone through the video twice I must have missed how to use the spreadsheet... help would be appreciated.

  • @robortiz4097
    @robortiz4097 4 ปีที่แล้ว

    I have a 2" dia. finder scope. When I plug this value in the spreadsheet, the length of the heating element calculates out as 17 ft. Is this correct? It seems like a lot of wire for such a small circumference.

  • @mjparker68
    @mjparker68 7 ปีที่แล้ว

    Hi there. I'm gathering the bits and pieces to make this project. Great information. Where did you get the gray wire you used and what type is it?

  • @joshmanske693
    @joshmanske693 7 ปีที่แล้ว

    this is awesome, any chance we can get a parts list?