I got the gainclone bug bad after reading Decibel Dungeon, Electonet, and here. This is cool! I'm learning lots of stuff.
I have put together the Decibel Dungeon point-to-point inverted one, and Electronet's power supply pcb.
It makes good sound, with no humming or hissing, but it heats up real hot. Besides the heatsink, the resistors between pin 3 and the Zobel get too hot. They're two 0.47 ohm 5 watt ones in parallel.
Does this mean I've done something wrong with the grounding? The rails measure OK, -V-0-V+.
One thing I don't know what to do with, is the power cable's 3rd prong grounding wire. I had it soldered to the ground of the PS's pcb, where the capacitors come together. Then I moved it to the body of my transformer. I don't detect a difference. The transformer doesn't have a 3rd wire for the 115V power cord's ground.
I have put together the Decibel Dungeon point-to-point inverted one, and Electronet's power supply pcb.
It makes good sound, with no humming or hissing, but it heats up real hot. Besides the heatsink, the resistors between pin 3 and the Zobel get too hot. They're two 0.47 ohm 5 watt ones in parallel.
Does this mean I've done something wrong with the grounding? The rails measure OK, -V-0-V+.
One thing I don't know what to do with, is the power cable's 3rd prong grounding wire. I had it soldered to the ground of the PS's pcb, where the capacitors come together. Then I moved it to the body of my transformer. I don't detect a difference. The transformer doesn't have a 3rd wire for the 115V power cord's ground.