07-18-2014, 03:12 PM
Ron, what you say regarding the ceramic resistor is true, but keep in mind the temperature of the ceramic will rise much higher, to several hundred degrees.
Since the heat is not being conducted to the chassis, the resistor temperature will rise to the point where the heat generated can be dissipated by convection and radiation to the air and surrounding components. Therefore, the underchassis components will be subjected to much higher temperatures than if the heat was conducted directly to the chassis. Since there is very little ventilation under the chassis, the heat will be trapped there until it warms the chassis surface where it will be eventually dissipated.
This was the reason Candohms were used in the first place. Instead of cooking the under chassis components and wiring, the heat could be transferred at a much lower temperature directly to the metal chassis which acts as a heat sink, where it could be dissipated to the surrounding air.
Since the heat is not being conducted to the chassis, the resistor temperature will rise to the point where the heat generated can be dissipated by convection and radiation to the air and surrounding components. Therefore, the underchassis components will be subjected to much higher temperatures than if the heat was conducted directly to the chassis. Since there is very little ventilation under the chassis, the heat will be trapped there until it warms the chassis surface where it will be eventually dissipated.
This was the reason Candohms were used in the first place. Instead of cooking the under chassis components and wiring, the heat could be transferred at a much lower temperature directly to the metal chassis which acts as a heat sink, where it could be dissipated to the surrounding air.
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