- Dec 7, 2009
- Reaction score
The 4.7K 2W resistor started to smoke on first fire up of the amp and I need some troubleshooting help. I pulled the resistor its a little burned on the outside but it measures correctly at 4.7K so I dont think the resistor was the problem, I'll order a new one any way since its burned. So I'm not sure where to go from here, everything looks to be in the right place. One weird thing I wasnt expecting, I fired up the amp without tubes to check the voltages and was expecting to get 7.5V I was getting more like 2.8V so I wasnt sure about that. Then when I put tubes in it and took it off standby the 4.7K resistor started smoking. See pictures below, it looks messy cuz I didnt do any lead dress, I'll get to that later, I just wanted to make sure it worked first. Any help is appreciated thanks.