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Thread: Dew Management.....

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    Gx8ES102's Avatar
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    Default Dew Management.....



    Because I've always been a summer observer I've only occasionally run into dew issues. Now that I am mostly EAA and imaging I have to take the jump as I've missed a couple of the rare fall/winter clear nights due to dew. Looking at an Astro zap controller and DewNot heaters, probably with have to run 3 (scope/EP/guider). Anyone want to give me some advice. Also getting a LapDome for the Laptop running sharpcap and TeamViewer. Looking for any and all advice.
    C90 (USA Rubberized, 1996), C8 (2000), ES 102 Triplet (2018), Orion ST 80 w/2" GSO focuser (2018), Starmaster 20 x 80 (2015), Eagle Optic Rangers 10 x 50 (2004), Sirius AZ-EQ G PRO (2018), LXD75 (2" legs, 2007), SLT (2008), Manfrotto 055 CF (2007) , ZWO224, Panasonic Gx8 (8 second live view, 4 shot stacking in camera)
    I tend to keep my Astro stuff Forever
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    Lots of software and other "Stuff".....

  2. #2
    Gabby76's Avatar
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    Default Re: Dew Management.....

    what information about the dewheaters are you looking for?
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the
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    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

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    Default Re: Dew Management.....

    Which are good and which are not.
    C90 (USA Rubberized, 1996), C8 (2000), ES 102 Triplet (2018), Orion ST 80 w/2" GSO focuser (2018), Starmaster 20 x 80 (2015), Eagle Optic Rangers 10 x 50 (2004), Sirius AZ-EQ G PRO (2018), LXD75 (2" legs, 2007), SLT (2008), Manfrotto 055 CF (2007) , ZWO224, Panasonic Gx8 (8 second live view, 4 shot stacking in camera)
    I tend to keep my Astro stuff Forever
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    Lots of software and other "Stuff".....

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    Gabby76's Avatar
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    Default Re: Dew Management.....

    My experience has just been with Kendrick Type IV controller and dew heaters and a Thousand Oaks controller.
    The Kendrick dew heaters have been outstanding, some are over 10 years old and still working perfectly and I have had them working down to -35°C (-31°F)
    I switched to the 4 channel Thousand Oaks controller only to get more individual channel control.

    I know AstoZap hass an excellent reputation with their dew shields and such but have never paid much attention to the heaters. I would assume that they will work well.

    http://www.kendrickastro.com/dew_premierheaters.html
    http://thousandoaksoptical.com/shop/...-control-unit/
    Gx8ES102 likes this.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
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    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite Eyepieces: A-Z

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    The weakest link in the optical chain is the large nut located directly behind the
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    / camera. - Gabrielle

    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

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    Default Re: Dew Management.....

    The AstroZap model I am looking at is 4 outputs, 2 channels (so you can have different current to the two channels which each cover two outputs).
    C90 (USA Rubberized, 1996), C8 (2000), ES 102 Triplet (2018), Orion ST 80 w/2" GSO focuser (2018), Starmaster 20 x 80 (2015), Eagle Optic Rangers 10 x 50 (2004), Sirius AZ-EQ G PRO (2018), LXD75 (2" legs, 2007), SLT (2008), Manfrotto 055 CF (2007) , ZWO224, Panasonic Gx8 (8 second live view, 4 shot stacking in camera)
    I tend to keep my Astro stuff Forever
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Lots of software and other "Stuff".....

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    Default Re: Dew Management.....

    If you get in a situation where you need to run more heaters, you can also use a Y adapter to double your outputs as long as you do not exceed the rated amperage of the controller.
    This is how I used to run 8 heaters from either of my controllers. Two heaters per output.
    rca-plug-to-2xrca-jack-adapter-y-adapter_NID0007396.jpeg
    Gx8ES102 likes this.
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
    Mounts: Celestron SLT w/ pier mod & EQ-3 tripod, Celestron hypertuned CG-5 w/ tracking motor & Argo Navis, Manfrotto 028B w/ Stellarvue M2C, Manfrotto 055PRO w/ 128RC, TAL-1 HD EQ, Vixen SXP w/ HAL-130 SXG & half pier Diagonals: 2" Astro-Physics MaxBright, 2" Zeiss/ Baader prism, 2" Baader Herschel Wedge (Photo Version), 2"
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Amici prism, 2" Stellarvue Dielectric, 2" TeleVue Everbrite Eyepieces: A-Z

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    The weakest link in the optical chain is the large nut located directly behind the
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    / camera. - Gabrielle

    Ya gotta keep this Apo/
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    thing in some balance of perspective. Apos are awesome, but long focus Achros aren't that far behind them - Siriusandthepup (CN)

    Refractors kick arse precisely because they don't hide behind excuses. That is, they have no obstructions to hide behind. - Jon Isaacs (CN)

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    Gx8ES102 (11-10-2018)

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    Default Re: Dew Management.....

    Gx8ES102, you don't specify in your signature but if your 224 is cooled you want to avoid using it when the humidity is high.
    Dennis. ~ 45 years of astronomy and not giving up anytime soon!
    Explore Scientific 16" truss DOB; Explore Scientific 152mm carbon fiber triplet w/3" Feathertouch; ES 80mm triplet; Apertura 10" DOB w/tweeker's; Celestron 9.25" Edge; Celestron Edge 14" with Feathertouch; Celestron CGE Pro mount; Celestron AVX mount with ADM "D" saddle; QHY Polemaster; and my first, a Sears 60mm F/11 doublet; ZWO ASI294MC-Cool; ES field flattener; ES 3" flattener/FR; Televue 0.8 field flattener/FR; lots of TV and ES eyepieces; Lunt solar wedge with Celestron XLT 102

  9. The Following User Says Thank You to bikerdib For This Useful Post:

    Gx8ES102 (11-10-2018)

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    Default Re: Dew Management.....

    bikerdib - thanks but mine is the more pedestrian uncool(ed)
    bikerdib likes this.
    C90 (USA Rubberized, 1996), C8 (2000), ES 102 Triplet (2018), Orion ST 80 w/2" GSO focuser (2018), Starmaster 20 x 80 (2015), Eagle Optic Rangers 10 x 50 (2004), Sirius AZ-EQ G PRO (2018), LXD75 (2" legs, 2007), SLT (2008), Manfrotto 055 CF (2007) , ZWO224, Panasonic Gx8 (8 second live view, 4 shot stacking in camera)
    I tend to keep my Astro stuff Forever
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Lots of software and other "Stuff".....

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    Default Re: Dew Management.....

    Since astronomy is a hobby for me and not something I want to spend thousands of dollars on, here is what I did for my dew problems. I operate everything from main power at my home, no batteries involved. I bought a Dew-Not strip for my 8" scope off eBay for 43.00 and a 30A LED dimmer for 10.00, so my total cost for dew control was 53.00. I just adjust the dimmer until the temperature of the strip is sufficient to keep the dew off, without the expense of a dedicated dew controller. Dew controllers become pretty necessary when operating off battery power, but not when you have an unlimited 12V source from a power supply. Works great!
    Juno16 likes this.

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    Default Re: Dew Management.....

    Dew controllers can get very pricey. DYI controllers can easily be made for half or a quarter of the price. My original dew controller was based on one from a club member:
    Build a 3-Channel Dew Controller

    Currently I'm building a second five-output dew controller for less than $50. Actually almost half of that. Many of the parts ordered from China came in packets of 10. You can find many variations of the above dew heater controller on the internet. The premise is the same....the led dimmer uses PWM to control the voltage supplied to the heater straps. The LED dimmers work very well in a dew controller application.

    Another consideration is the use of AC where available. This power converter allows you to use your dew controller with AC.
    PWR+ UL Listed 120W-Converter AC to DC

    When it comes to dew straps I'm not to keen on the DYI route but many have been successful. I've heard a lot of good things about R-Sky Astro Instruments and the quality of their products. The finder heater will soon make it to my astro-stable.

    Clear skies!!
    - Rick
    Astronomical League Member-At-Large
    Scopes: Zhumell Z10, Explore Scientific AR152, Celestron 8SE, Meade Infinity 80
    Eyepieces: ES 82° - 30mm, 24mm, 18mm, 14mm, 11mm, 8.8mm, 6.7mm, 4.7mm, ES 2" 2X Focal Extender
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