Hi all,
I have 2 of these excellent discrete diamond non-feedback IV output stages up for grabs. I set these up for the (also excellent) Miro AD1862 DAC with a 2k7 melf resistor for IV duty. These boards also have the facility to adjust offset so that they can be used for other current output DACs - they were designed for 1541 DACs. The boards were originally laid out for a group buy here on DIYaudio, and I had these printed from the gerbers on that thread. The full documentation of the circuit is available here. So if you want these for a 1541 then you need to add the few parts to adjust offset.
You'll need a ~ +/-19V supply for this build. I used matched 2sa970/2sc2240 in this build, and matched them tight enough that I didn't need DC blocking caps on the output. If you want to include caps, you can easily remove the jumpers I have in and fit the caps of your choice. All parts are from reputable sources, either Mouser or Reichelt.
Looking for 30e each plus postage (it looks like this will be 10-20e tracked anywhere in the world)
I have 2 of these excellent discrete diamond non-feedback IV output stages up for grabs. I set these up for the (also excellent) Miro AD1862 DAC with a 2k7 melf resistor for IV duty. These boards also have the facility to adjust offset so that they can be used for other current output DACs - they were designed for 1541 DACs. The boards were originally laid out for a group buy here on DIYaudio, and I had these printed from the gerbers on that thread. The full documentation of the circuit is available here. So if you want these for a 1541 then you need to add the few parts to adjust offset.
You'll need a ~ +/-19V supply for this build. I used matched 2sa970/2sc2240 in this build, and matched them tight enough that I didn't need DC blocking caps on the output. If you want to include caps, you can easily remove the jumpers I have in and fit the caps of your choice. All parts are from reputable sources, either Mouser or Reichelt.
Looking for 30e each plus postage (it looks like this will be 10-20e tracked anywhere in the world)
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