DAC build TDA1541A/SAA7220P/B *will take som time*

Installed Vizual analyser a few days ago.
Today I got the "gadget" needed to connect between the probes and the soundcard. It connects to mic in.
Now all I need to do is learn how to use VA....

The box has diodes inside to protect the soundcard from voltage above 1,4V
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This how the PCB will be placed, all IC's as far away from the transformer as possible. 2 outputs for easy swapping between opamps and tube output. The cable is from an earlier project I planned for this enclosure, and will be re-done.
An externally hosted image should be here but it was not working when we last tested it.


Got a nice green 220Vac LED that matches the retro look.
An externally hosted image should be here but it was not working when we last tested it.
 
Hopefully I'll get the transformer and the TCXO this week, but that's if I'm lucky.
Sides and possibly front of the enclousure will be oak or similar, top will be black steel mesh(don't know if that's the word, steel plate with holes for ventilation).
 
Thats very fast 😕

Anyway, the cans are quite nice and fit exactly over the TCXO without touching other components or tracks. With some hot melt glue or epoxy resin they'll be perfect.
They even have a small removable lid.
I sent some spares this time so you can fit them in other machines too maybe.

Let me know when they arrive.
 
Thats very fast 😕

Anyway, the cans are quite nice and fit exactly over the TCXO without touching other components or tracks. With some hot melt glue or epoxy resin they'll be perfect.
They even have a small removable lid.
I sent some spares this time so you can fit them in other machines too maybe.

Let me know when they arrive.

Will do, and thanks again mate! 🙂

I've got shielded tubesockets and tubecaps as wel, so with a wall between the transformer and the rest...this should be a pretty well shielded dac 🙂
 
Feels a bit nostalgic...I just did the last bit of soldering on the PCB.

TCXO socket now in place.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.
 
Started with the internal wiring.
Braided 0,6mm pure silver in PTFE tube. This is the internal digital wiring
An externally hosted image should be here but it was not working when we last tested it.


An externally hosted image should be here but it was not working when we last tested it.


This is close to how it will be when pcb is in place and the cable soldered in place.
An externally hosted image should be here but it was not working when we last tested it.
 
Hi Mayday, Your making good progress. Keep us posted. I have all the parts now for my second build minus the chassis or enclosure. I'm going to mount it on a bread board first and once I'm happy I will finish it off in a nice enclosure. 🙂 Dave BTW: I have been watching, just battled 2 different colds. Hope that's over now.....