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David, I have a Thousand Oaks controller and various Dewnot straps and a DG-1 heater on the secondary. I also have a 12V gel battery with an ammeter in the circuit so I can monitor consumption. When I get time, I'll plug in various heaters, twiddle the dials and report the current consumption.
The other very dewy night, I wanted to point my camera at the sky. I took my finderscope dewnot heater and wrapped it around the lens. I found a little AC powerpack lying around which was spec'd at something like 10V 200mA and connected it and let it rip. A rough measurement suggested it was drawing 300mA! Well it ran for several hours, powerpack didn't blow up or even feel hot, heater strap didn't feel to be overheating and camera lens stayed completely clear in the misty air while dew settled everywhere else!
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