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yes it's correct, 3.1 ohm, before I cut the cables length it was 3.4 ohm. But because they are connect in serial of each other the voltage over each is only 2.5 Volt. It gives 2 Watt each. U^2/R = P.
If I want to have lower power I have to use the included regulator, it's like a very slow pulse width modulated device. With that I can have the 1/1, 1/2 or 1/4 setting, the last should give about 1/2 Watt at each heating band.
What power do you have on your heating devices and to what lens or telescope ?
/Lars
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