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This one failed just slightly beyond the duration of its one-year warranty
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The thermocouple at the top of the Riser Tube reached 83 °C and was also affected by drafts.
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The J-B Industro Weld epoxy was in fine shape.
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Don’t install cartridge heaters without a thermal cutout: your insurance agent should not be given an opportunity to die laughing.
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Paradoxically, the crumbled resistor core in the picture came from the resistor in the best shape.
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The obvious question is whether you want a single high-wattage cartridge heater or a pair of low(er)-wattage units
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My Shop Assistant used a fairly new measuring tape and reported that the retracting crank handle fell off in “normal use”.
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I suggested making all the connectors from fishmouthed sections of the CPVC tube, which called for a bit of Quality Shop Time before the next build session.
The Smell of Molten Projects in the Morning 