Modified Gigaworks DAC form ebay

Aluminium case from Italy http://www.autocostruire.com/
Output transformers: Lundahl LL1690
Power transformer from the scrapyard(230v/9v 20VA)
BNC connector for Digital input
Silver wires with teflon

Class-A 2SK1058 MOSFET Amplifier

For my first amplifer project, i decided to build this simple amp based on Mark Housten ZCA design. You can visit http://www.diyaudioprojects.com for more information. 

 For the power resistor I used one 15ohm 100w wirewound resistor from Arcol. Instead of a potmeter on the input I used one 47,5kohm resistor. As I plan on using the volume control on my PC, I dont want any unnecessary parts to ruin the sound. The mosfet I got from Ebay. Bypass Caps are Mundorf Mcap supreme. I just happend to have them laying around. I belive there are other cheaper caps that will do the job just as good. The wire from the RCA connectors are pure silver with teflon insulation. The rest of the wires are cheap solid copper. 






For the choke I used two 4,7mH, one at the positiv rail and one at the negativ. The big electrolyt caps are 15000µF from rifa(x4)

Zen ver 4

My second amplifier project

Zen ver 4 (Penultimate Zen)

http://www.passdiy.com/

Homemade pcb with nailpolish(105µm CU)

Finished pcb

Amp layout

Heatsinks ready tapped and with the 6 mosfet mounted. A little change in plan. I did not have room for the 2x500W transformers so I will make an external powersupply. 

Power supply