So yesterday I posted that the top plate was complete. Today I can say that the new spud amplifier is totally complete and ready for testing.
This afternoon I got the top plate mechanically installed on the chassis and completed all the final wiring. Here’s how the inside looks.
I even installed the #47 indicator light and a 1A/250V fuse. Then I panicked.
In all of this planning I had not thought to ensure that there was an acceptable set of tubes for this amp in my stash. A few tense minutes pasted as I dug through the parts closet and finally came up with a nice set of GE 6EM7s and a GE 6CA4 rectifier.
Damn! Just now, as I was looking at the picture I just took, I realized that I had forgotten something rather important. I have not tied the chassis grounds together. The rear plate with the power/speaker/signal connections is tied to safety ground. However the top plate and front plates are not. I think I’ll get that done before I decide to apply mains power.
So soon it will be time for some initial power and voltage checks, then some time listening. The detailed characterization will come after I’ve decided I like the sound. Time to sally forth.
As always, questions and comments are welcome.