Bottlehead Forum
Bottlehead Kits => Crack => Topic started by: magicalmysterytour on January 02, 2021, 03:37:31 PM
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Hey guys,
I have a moderate crackle in the right channel with my Crack kit (no speedball). I built the kit a few months ago and it made sound but later developed a crackle. Thinking that it was a bad tube, I waited for a new tube (which didn't fix the problem). When I flipped the top plate over to look at the circuit I saw the plate resistor on the right channel is charred and the B+ wire coming from the 6080 is slightly charred. Could this issue be more then a bad joint? Any ideas?
Matthew
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From what I can see in your photos:
5L is unsoldered.
4U/4L have not been heated enough for the solder to flow out.
3U has not been heated enough for the solder to flow out.
3L looks unsoldered.
2L is a cold solder joint (needs more heat)
The green wire attached to B7 in the lower hole does not look to be soldered.
The joints at B8 look cold, but I can't see them all the way.
B2 needs more heat to flow out.
The wire at 9U needs more heat/solder.
I would need more photos to get an idea of what happened to the 22.1K resistor. Does it still measure at 22.1K? This resistor won't char unless you also have a voltage problem in the amp, and knowing what voltages are off could sure be helpful.