August 11, 2023

This morning I ran the SMC2 for the first time using the working MCU from the Hideaway Unit. The PCC had already been tested in the prior SMC1. It all works great! Selections are made and the amp has great sound with really good tight bass. It works but there’s still a long way to go.

Last night I had put the MRA4 amp on the kitchen table that doubles as the “inside” bench to see if I could find the source of the hum. I like to do an hour or so of amplifier work before turning in. Usually 9-10pm. I ran a new ground to a couple of high voltage axials that were mounted on stand-offs. I couldn’t see where they were grounded as the caps obscured the view. I resoldered two other grounds in the high voltage circuit and found another ground that has several leads mounted to it. The leads were twisted around and the lug had never been soldered. One of these findings just about has to be the source of the hum. I installed the big 15 inch speaker and then the amp. With crossed fingers I turned the juke on, selected a record and….NO HUM. I can’t run around in circles patting myself on the back just yet. There was another time when the hum went away. Still, considering what I had found the night before I was fairly confident it was gone for good.

Eric S. from Ft. Worth dropped by to pick up the beautiful tear drop. It’s going to a good home where it will be lovingly admired. I pointed out the pair I have on the wall telling him they weren’t connected and never would be. I just like to admire them. He grinned and said that is pretty much what he would do too. There’s something about that style I really admire. He told me of a very recent aquisition of another tear drop needing restoration. He took a picture of the color code on the can of paint I had used. I’m certain he will make a match to the one he got from me. I’m gonna offer him the left over grill cloth I used so he really can have a match.

Leave a comment