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Take one old hair dryer.
Remove heater coil.
Straighten out a few feet and use an ohmeyer to give you a couple of amps worth of ohms (v=IR).
Test temp of section when 12 volts is placed across it.
Should be just hot enough to hold onto without screaming.
Place wire inside some silicone sheathing.Wrap around ota near objective .
Cost = about 3 dollars for an old hair dryer.
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