Monday, May 28, 2012

Here it is almost done.  There were too many wires going from the amplifier board to the power board, so I  reduced the number by daisy chaining power and ground cables.  Hopefully this doesn't affect the sound negatively.
I have made changes to this since this picture, but this will be the general layout.
Now I have to finish drill holes in the front panel for the headphone jack, power switch, and LED, and in the back, I need to cut out the rectangle for the IEC.

Friday, May 25, 2012

Completed the AC->DC section.



The power section consists of 2 rectifiers, one each for the +15V and -15V rails.
The filter capacitors are Panasonic FM 1500µF 35V metal foil caps and a 1µF Epcos Polyester film cap.
The linear regulators are the 7815 for the positive rail and the 7915 for the negative rail.
The reservoir caps are Panasonic FM 3300µF 16V metal foil caps and a 1.2µF Vishay-Dale polyester cap.
The dual TO-220 heatsink is soldered to the board, and the regulators are stuck to it by pressure and Arctic Silver Ceramique thermal paste.

The 1/4" headphone jack is not part of the power section, but it is there because of it's location on the front panel and so it can support the board while mounted to the front panel.

Thursday, May 24, 2012

Construction on the amp has begun.



















The amplifier section was completed today,  I'm going home for the weekend, so this won't be dont till monday maybe.

Saturday, May 19, 2012

The amp is still coming.   Right now I'm still designing it and getting input on it.  I'll be ordering the parts sunday night.  I bought a drill to do case work.
Here's a schematic of it that looks like it was drawn by a retarded Dr. Frankenstein.