My Aleph30 is Completed

I finally completed my ALeph30. Here the serie of pictures. The sound is so gound that I'm having problem listening to any other amp. Thanks Nelson Pass.

Here the mechanical assy is almos done.

Here The Heatsink and the Thermal Protection

The one thermal protection on each channel, connected in serie.
They are installed on the heatsink on the hotest side, see the fan option in the next post...

One Channel

Here one complete channel

Complete Power Supply

Here the almost complete power supply (without the CRC filter) mounted in the frame.

Power Supply CRC Filter

Here a side view of the Power Supply CRC Filter. You can see the Panasonic FC cap and bypass MKT4 filter mounted on the transfo. You can also see the CRC resistor 0.5 ohms, 10W, Dale mounted on the bottom frame.

Side Open View

Here a view of the side open, one channel not installed. You can see the shielded transfo, The star ground bolted to the bottom, the rectifier bridge also bolted to the bottom and the CRC filter.

Rear View Open

Here the rear of the amp opened. You can see the mechanical clearance is rather small. It is really a compact desing. I was limited by the front and rear panel dimensions for reasons that you will see...

Front View

Almost done, here the front panel with the blues led power indicator (it matches the BOZ preamp that I used with it).
You can see a nice finish for this panel. The secret, I used two old Hayes modem case that I cut in two. This nice cases were made of aluminium extrusion. I kept only the top section that I used for the front and back. These panels limited the amp width, here the call for the amp being so compact. The panel height matched perfectly the heatsink that I used. Great look I think...

Rear Panel

Here the nice and complete rear panel.

Top View

Here the complete top view...

Fan option

For the look and the mechanical assy I installed the heatsink horizontally, not good. I lost some of the efficiency of this nice 0.4 deg C/W heatsink. The temperature was a little bit to high, around 65C, outch. So I added a fan option. Now I'm around 45 deg C, much better. I used ball beearings small 12Vdc fan and reduced their speed using a serie resistor. A switch can be used to shut them down. We cannot hear them listening to music...

My complete setup

Here the amp ready for musing in my workshop with my Copland CD player and NAD Serie reference tuner, great...

Some of my lab

And here were the amp was born. A section of my workshop...
Bye.