Archive for December, 2009

Finally finished! (mostly…)

December 16th, 2009 1 comment

I finished the wiring on the amp just before Thanksgiving, but haven’t had time to update the blog, due to other pressing projects.  I was able to fire up the amp briefly to try it out.

Completed wiring

Completed wiring


Everything seems to be working but there are some issues I will need to troubleshoot once I have time to work on this again.  There is a constant, low-level hum that I need to track down.  I’ve done a quick check of the wiring by moving leads around with a chop stick, with no effect.  I’ll need to check further but I’m hoping that at least means that my leads are run okay.  I’ll also try different tubes, and double check my solder joints and component values and see where that takes me.

I also need to do something about the voltages in the circuit – everything seems to be running much too high.  I’m assuming this is due to my choice of power transformer.  I’ll probably deal with this problem first, on the outside chance that it’s contributing to my hum problem.

Categories: Ampeg B15NC Project Tags: