Quote:
Originally Posted by Frontieroptics
From my experience, I have found the best position for the heater is to be just behind the corrector plate housing. The corrrector only needs to be no more than 1 deg above ambient.
Placing the heater in front of the corrector will require more power as the heat is lost to the open air quicker before it gets to the middle of the corrector and is replaced by cold air, this can result in the middle of the corrector still dewing up while making the outer edges too warm as you crank up the power to try to compensate.
Using a good dew shield and as Monte has said, insulate your heaters from the cold outside air will bring your power consumption down to minimal levels and makes heating the corrector evenly to about 1 degree above ambient easier.
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Thanks Daniel.
I may be using too much power and need to make a PWM for it.
I think the corrector in fact was too warm ...much warmer than 1-2 degrees above ambient. Is 6 watt heaters too much ?
Geoff.