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I gave the heater controller a good run last night. I hooked 4 heater straps up 12", 2of2" and .96"and ran the whole thing of a selaed lead acid battery (the sort that goes in burgler alarms etc).
For most of the evening the ambient temp was a couple of degree's above the dew point but with the 5 degree margin I use so the heaters were running at a light duty cycle. With a dew point of 17 and ambient of 19 the sensors just under the heater straps were reporting a temp of 22.
The battery did not seem to have any trouble keeping it all going and showed only marginal voltage drop under load. The optics all remained dew free while others were having dew problems.
The ugly part was the wires running all over the scope, I do need to find a way to tidy that up.
Bob
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