Well, I read the brochure which is nice and colorful and only moderately useful. There is a chart out on page 15 that shows these things have a 6:1 ohms resistance change from room temp to glass temps (0.4 ohm/mm/m to 2.4) which is very close to a short circuit at cold temps. It's getting late so I won't type what I am thinking and be stupid.
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Mike Firth
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