07-18-2014, 09:00 AM
Here's something about the chassis mount resistors: They are encased within their own heat sinks, but are designed to be mounted to metal for maximum heat dissipation. As a result, they are smaller than their ceramic brethren.
A 50 watt ceramic resistor is 4 inches long. The same 50 watt heatsinked chassis mount resistor is less than 3 inches long.
If the ceramic resistor gets hot due to the amount of current flowing through it and the watts dissipated by it, the surrounding air will become hot. Anything very close to the resistor, or touching it, will also get hot.
If the heatsinked resistor gets hot, the area of the chassis where it is mounted gets just as hot.
This is why I was considering replacing the heatsinked resistors with ceramic.
Your thoughts before I proceed to merely move the 3K heatsinked resistor are welcome.
A 50 watt ceramic resistor is 4 inches long. The same 50 watt heatsinked chassis mount resistor is less than 3 inches long.
If the ceramic resistor gets hot due to the amount of current flowing through it and the watts dissipated by it, the surrounding air will become hot. Anything very close to the resistor, or touching it, will also get hot.
If the heatsinked resistor gets hot, the area of the chassis where it is mounted gets just as hot.
This is why I was considering replacing the heatsinked resistors with ceramic.
Your thoughts before I proceed to merely move the 3K heatsinked resistor are welcome.
--
Ron Ramirez
Ferdinand IN
