Quote:
Originally Posted by DavidTrap
5amp at 12v equals 60watts
DT
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Oh yes that's true. I was thinking of the 240 volt input to the transformer. So its not that much of a drain then.
Quote:
Originally Posted by peter_4059
Greg,
In the case of a dew heater, I believe all of the electrical power is converted into heat regardless of whether it is wire or thin film resistive device. The only difference will be how much of that heat is transferred to the place you want it. If the heater strap is not well insulated, some of the heat will pass to the surrounding air (convection) however if the contact between the strap and the OTA is good, the heat transfer rate from the strap to metal (conduction) will be much greater.
Kendrick also has a webpage discussing power consumption, heat distribution and capability of heater straps with a lower power rating:
http://www.kendrickastro.com/dew_flyheaters.html
I don't believe there will be any advantage in terms of power saving if you are running the strap in a temperature controlled mode. |
That may well be the case.
Thanks for that. My site does go down to 2C at the lowest but generally 5C.
If the Dew-Not does not work out I guess its a Kendrick one. Its the controller that's the more expensive item anyway.
Greg.