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PostPosted: Tue Jun 19, 2007 1:13 pm 
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Showy Hen
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Can any one tell me roughly what would be an acceptable temperature variation for an incubator? Acceptable as in how much change is enough to cause problems.
Im trying to work out if my thermostat is up to the job or if it is allowing too much drop before cutting in.
Hope you understand what I mean.


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PostPosted: Tue Jun 19, 2007 2:09 pm 
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Great Game
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Hey there.

I try and keep my incubators within 2 oF. 1oF +/- of the desired temperature.

What type of incubator have you got?

Cheers

Ash :wink:


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PostPosted: Tue Jun 19, 2007 2:12 pm 
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Showy Hen
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Sorry, should have said in my first post it is a home made one.
(yes I know, makes it very tricky)


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PostPosted: Tue Jun 19, 2007 2:16 pm 
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Great Game
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If you can try, make sure that the thermostat doesnt fluctuate more than 1oF up or down from the desired temperature.

Fan forced incubator - 99oF-101oF

Still Air Incubator - 100oF-102oF

Im sure you can work out the conversions :P

Cheers

Ash :wink:


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PostPosted: Tue Jun 19, 2007 2:21 pm 
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Showy Hen
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Thanks Ash.
Gives me something to go on so its another step closer.


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PostPosted: Tue Jun 19, 2007 2:24 pm 
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Great Game
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No worries, Feel free to ask any other questions that you have.

Or feel free to pm myself or Jocler, I know he is pretty up to date with the technology side of things...

Cheers

Ash :wink:


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PostPosted: Tue Jun 19, 2007 2:30 pm 
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Showy Hen
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You may regret that kind offer! Its driving me nuts.
Thought I had the temp and humidty spot on but ended up with dead in shell with no sign of a pip (left them in for a lot longer than 21 days just in case.
Im at the point of putting it all in the too darn hard basket until the weather warms up in the hope that this will help.
Just wish my black silky would come back into lay so I could let her do all the work :)


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PostPosted: Tue Jun 19, 2007 2:34 pm 
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Great Game
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DIS chicks that develop right up until day 21 and then don't pip are usually humidity related.

Make sure that you take close notice of the size of the air sac in the DIS. As you make find that the air sac is too small for the chick to successfully pip through, which means that you need to decrease the humidity level. I have found that it is much better to have too little humidity than too high.

Cheers

Ash :wink:


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PostPosted: Tue Jun 19, 2007 2:39 pm 
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Chookmad,

What are you using as the thermostat? I usually find that the forced air incubators are far better regulators then still air.

J

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PostPosted: Tue Jun 19, 2007 2:42 pm 
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Showy Hen
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Ash I can not thank you enough!
I went an looked (feel ill and want to cry but had to do it)
and the air sac is very small (about what the brinsea handbook shows for day 15)
For the first 17 days it was 40-50 (mostly closer to the 50) then just over 70 for the last run.
Im guessing that the humidity in the first 17 days is the problem?


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PostPosted: Tue Jun 19, 2007 2:47 pm 
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Great Game
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The importance of the humidity level is an Average level over the 21 days of incubation...

For eg. If you have the humidity too high for 17 days and then try to decrease it, it is too late.

Where as if you were to run it too high for 4 days, then let it drop for 4, the average humidity will even out.

Try to make sure that the humdity isnt too high from day 1 to day 18, but then when you get to day 18-19, the higher the humidity the better.

I have found that I can run my incubator in wetter months with no water in the tray, but mist the eggs daily and still have good success. It depends on your climate.

Cheers

Ash :wink:


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PostPosted: Tue Jun 19, 2007 2:52 pm 
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Showy Hen
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Jocler sorry I missed your post.
I have a petzone theromostat.
Have just a little cheap hygrometer but hubby borrowed a wizz bank electronic one and we checked it against this and it is accurate.


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PostPosted: Tue Jun 19, 2007 2:54 pm 
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Showy Hen
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and there is a small computer fan in the box.
Weather here is freezing at the moment but we have the incubator in the lounge room as its the warmest room in the house. Its not too near the wood fire and not near a window.


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PostPosted: Tue Jun 19, 2007 3:26 pm 
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Chookmad,

Building your own incubator is very satisfying.

Incubators, in general, are a matter of trial and error and there are many "little" things that can go wrong until you get to know your incubator and how it works in your weather conditions. Building your own, you learn a lot as you will know it inside and out and develop it as you go.

Dont give up on it.

Agree with Clucky, humidity is an average across the incubation cycle. I also tend to let mine run dry in the first 2 weeks. I half fill the water container once a day until about day 16, then fill the container once per day so that there is water in there all the time.

J

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PostPosted: Tue Jun 19, 2007 3:33 pm 
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Showy Hen
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Thank you for the encouragement. (desperately needed)
Will keep playing with the humidity and will try running it dry so thanks for that information.


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