MrPolarBear
- Feb 25, 2023
- 4
- Joined
- Feb 25, 2023
- Messages
- 4
Hi all
I recently picked up a kingshill 36v5c power supply. I got it working from a previous zombie state, exept now i have an issue with the wattage of a resistor. It has two 1k resistors in parralel that helps drop voltage to create a negative bias for the opamp.
The issue arises in that the manual says the two resistors should be 1/2w, so 1w in total. Exept someone else has replaced these with two 1w resistor, so 2w in total, but the are burning hot when running and killed a transistor that was situated next to it, i replaced it with a 3w resistor but it is still very hot. The measured voltage across the resistor is 24.5v with 0.05A running through it. P=V x I = 1.2w so why is it still hot?
I recently picked up a kingshill 36v5c power supply. I got it working from a previous zombie state, exept now i have an issue with the wattage of a resistor. It has two 1k resistors in parralel that helps drop voltage to create a negative bias for the opamp.
The issue arises in that the manual says the two resistors should be 1/2w, so 1w in total. Exept someone else has replaced these with two 1w resistor, so 2w in total, but the are burning hot when running and killed a transistor that was situated next to it, i replaced it with a 3w resistor but it is still very hot. The measured voltage across the resistor is 24.5v with 0.05A running through it. P=V x I = 1.2w so why is it still hot?