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Valve DAC from Linear Audio volume 13
Valve DAC from Linear Audio volume 13
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Old 21st December 2019, 07:26 PM   #371
merlin el mago is offline merlin el mago  Europe
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Quote:
Originally Posted by MarcelvdG View Post
It looks like it will be a challenge to mount those Russian 15 nF filter capacitors...
There is smaller available: FT-1...
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Old 22nd December 2019, 10:56 AM   #372
snax is offline snax  United Kingdom
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Hi Merlin,

I agree that the FT1's would be better but it's finding a reliable source.

I have been to St Petersburg a few times and Moscow infrequently but never found what you would call a supplier. (that sentence might need rethinking).

Online is even more hit and miss when it comes to component supply. Most of the eBay caps come from the Ukraine and I have not had the opportunity to go.

So you get what you can when its available and this is why I have a parts bin full of random parts that never quite fit the boards that I populate.
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Old 22nd December 2019, 03:25 PM   #373
merlin el mago is offline merlin el mago  Europe
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I bought mine on ebay.
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Old 5th January 2020, 03:38 PM   #374
nautibuoy is offline nautibuoy  United Kingdom
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A little progress today...

The reconstruction filter output boards are all assembled and ready for use. As you can see from the pictures below, I've designed these so the slot into channels in the back panel of my chassis so they take up very little real estate and the connections can be nice and short.

Click the image to open in full size.

Click the image to open in full size.

I'm using a similar arrangement for mounting the toroids for the power supplies. Power supplies are almost finished and I've started to assemble the chassis so I can power them up and test them.

Ray
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Old 5th January 2020, 03:43 PM   #375
merlin el mago is offline merlin el mago  Europe
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Congrats Ray, your work really shine.
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Old 5th January 2020, 03:45 PM   #376
nautibuoy is offline nautibuoy  United Kingdom
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Originally Posted by merlin el mago View Post
Congrats Ray, your work really shine.
Cheers Felipe
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Old 5th January 2020, 04:30 PM   #377
MarcelvdG is offline MarcelvdG  Netherlands
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They certainly look better and more compact than my reconstruction filters (tan coloured board on the left, photo made by Piet Blaas).
Attached Images
File Type: jpg fotobuizenDACPietBlaas.jpg (362.8 KB, 302 views)

Last edited by MarcelvdG; 5th January 2020 at 04:42 PM.
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Old 5th January 2020, 04:52 PM   #378
nautibuoy is offline nautibuoy  United Kingdom
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Quote:
Originally Posted by MarcelvdG View Post
They certainly look better and more compact than my reconstruction filters.
Thanks Marcel. The inductors are the custom wound jobs from Don Audio, caps are obviously polystyrene types and resistors metal films.

My next objective is to get the power supplies installed and tested so I can power up the Beaglebone Black in-situ and test the isolator/reclocker; when that checks out I'll be able to start testing the main Valve DAC board (for clock and data signals) before I finish populating it.
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Old 14th March 2020, 07:32 AM   #379
audioillness is offline audioillness  United Kingdom
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Hi Ray,
Any progress made with this as yet?, I have been following this thread with interest.
Thanks 👍
Dave
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Old 14th March 2020, 08:05 AM   #380
nautibuoy is offline nautibuoy  United Kingdom
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Quote:
Originally Posted by audioillness View Post
Hi Ray,
Any progress made with this as yet?, I have been following this thread with interest.
Thanks 👍
Dave
It's been a bit slow on this project Dave, busy at work and I've prioritised completing my DSC2 and Soekris dam1121 HPA projects first. DSC2 is now done and Soekris is waiting for a friend to do some smd soldering for me (he's got a reflow oven!) so coincidentally I am planning to do some work on the Valve DAC this weekend. I'll report back idc.
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