dbishopbliss
New member
I played with a bunch of different bypass capacitors tonight; 0.1uF polyester film, 2.2uF polyester film, 2.0uF film obbligato, 10uF film obbligato. I couldn't hear a difference between any of them so I'm going to go with the cheapest 0.1uF polyester film cap I have.
I have also re-mounted the power transformer on hard rubber gaskets using screws and bolts that go through the wooden chassis. I was using wood screws before and because of the chassis shape, I could only get two of them into the wood (and one of those wasn't really very tight). I haven't had a chance to plug things in again because of other changes I'm making, but I assume the mechanical hum will be reduced significantly. Now that I think about it, the wooden enclosure may have even been acting as a resonator amplifying the vibrations. I'll let you know how things go tomorrow evening.
I have also re-mounted the power transformer on hard rubber gaskets using screws and bolts that go through the wooden chassis. I was using wood screws before and because of the chassis shape, I could only get two of them into the wood (and one of those wasn't really very tight). I haven't had a chance to plug things in again because of other changes I'm making, but I assume the mechanical hum will be reduced significantly. Now that I think about it, the wooden enclosure may have even been acting as a resonator amplifying the vibrations. I'll let you know how things go tomorrow evening.
