Salas hotrodded blue DCB1 build - Page 271 - diyAudio
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Old 17th February 2013, 12:07 PM   #2701
Salas is offline Salas  Greece
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Quote:
Originally Posted by mike_mcf View Post
I have been following the nCore thread for some time (a future project). The consensus is that the nCore SMPS is as good as a linear PS. Expensive, but it proves that a SMPS can be made well enough for audiophile applications.
For power amps surely. I haven't looked in to its specs like output impedance, its flatness, extension, rejection, and absolute noise so to know if it can be better than a Jung reg linear standard of performance for instance when looking for state of the art regs for low PSSR preamp circuits.
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Old 19th February 2013, 06:40 AM   #2702
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Quote:
Originally Posted by Salas View Post
That ripple goes to 60mV peak to peak when it gives 1A. It receives linearly regulated DC input in the test, I don't know if it adds even more stuff if fed from just bridge and capacitor. Typical laptop bricks can be worse or bit better but that's the deal more or less. Silent SMPS are costly and sophisticated. Like those for Hypex Ncore amps.

Hi Salas,
Gee, I hadn't thought to look at that wave form,I bought some(10) of those from the manufacture S-ure for some audio use ,maybe some r's and caps would smoothe it out? or build some more Salas shunts and don't worry about that problem,lol
NS
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Old 19th February 2013, 07:03 AM   #2703
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here's my setup with DCB1,It's on a board to help me get a cabinet layout Idea ,I am using 8 class A Fet amps.The cabinet will have 4 slide in/out draws ,with a 2 mono blocks per shelf ,with Power supplys outside of the box to help with the shielding and heat removel,I am real happy with the DCB1 works GREAT! The 2 amps in the pics are STD F5's that are water cooled as the rest will be also,They are running at 1.3 amp per fet and the water at the sinks are staying at 100 degrees ,I haven't added a radiator yet but will,I made the sinks from server copper heatsinks cut in half and covered with copper sheet and a outlet and inlet of .5" copper tube ,I'll need it with 2 f5's for tweeters,2 F5 turbo's for mids,2 F5 turbo's for Mid bass and 2 V3's for xoc1's subs, almost all is ready, soon they will all get to play together,LOL. The cabinet is being bent up this weekend,a little paint and some wiring ...........
Regards,
NS
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Old 19th February 2013, 05:28 PM   #2704
Salas is offline Salas  Greece
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Quote:
Originally Posted by noSmoking View Post
Hi Salas,
Gee, I hadn't thought to look at that wave form,I bought some(10) of those from the manufacture S-ure for some audio use ,maybe some r's and caps would smoothe it out? or build some more Salas shunts and don't worry about that problem,lol
NS
Surely smooth it out further and see results on the scope. There are circuits with low bandwidth and good PSRR that you may find them switchers enough for them. They are good for up to 10W power when the bottom is dissipating on a metal plate. Watch the temperature on the individual components on that tiny PCB though to know up to what amperage is good for the provided cooling. Tell tale borderline is when you can hear the 33uH SMD coil squealing loud enough.
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Old 19th February 2013, 05:30 PM   #2705
Salas is offline Salas  Greece
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Quote:
Originally Posted by noSmoking View Post
here's my setup with DCB1,It's on a board to help me get a cabinet layout Idea ,I am using 8 class A Fet amps.The cabinet will have 4 slide in/out draws ,with a 2 mono blocks per shelf ,with Power supplys outside of the box to help with the shielding and heat removel,I am real happy with the DCB1 works GREAT! The 2 amps in the pics are STD F5's that are water cooled as the rest will be also,They are running at 1.3 amp per fet and the water at the sinks are staying at 100 degrees ,I haven't added a radiator yet but will,I made the sinks from server copper heatsinks cut in half and covered with copper sheet and a outlet and inlet of .5" copper tube ,I'll need it with 2 f5's for tweeters,2 F5 turbo's for mids,2 F5 turbo's for Mid bass and 2 V3's for xoc1's subs, almost all is ready, soon they will all get to play together,LOL. The cabinet is being bent up this weekend,a little paint and some wiring ...........
Regards,
NS
Steam punk feel diy stuff. Cool.
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Old 19th February 2013, 05:41 PM   #2706
stajo is offline stajo  Sweden
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Originally Posted by Salas View Post
Steam punk feel diy stuff. Cool.
Indeed!
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Old 21st February 2013, 08:26 PM   #2707
KT is offline KT  United States
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Hi, guys.

Nice looking work.

I have a quick question. I'm sure it's been addressed by now, just haven't had time to look through the entire thread.

It's this: Can the board be cut in two to separate the audio circuit from the power supply circuit? I'm almost sure this has been asked and answered at some point.

I have the black circuit board from the red, black, and white kit. I'm really interested in using the DCB1 to buffer the output of an optical volume control. Obviously, it is of great benefit to keep the hot power supply away from the LDRs, as they really drift with temperature.

My desire is to house the power supply in an outboard box and connect it to the optical control/buffer via an umbilical cord.

Can it be done?

Thanks!
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Old 21st February 2013, 09:23 PM   #2708
Salas is offline Salas  Greece
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Yes.
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Old 21st February 2013, 10:04 PM   #2709
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I chopped up a mesmerize board with a chopsaw, and used just the channel switcher part and then with another chop, isolated just the positive rail to power the leds in my optical resistor volume control. The negative channel went in the bin in this case.

(I added a full DCB1 hot-rod and a remote control volume pot for the opticoupler, and that is my current pre-amp.)
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Old 21st February 2013, 10:27 PM   #2710
KT is offline KT  United States
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Originally Posted by Salas View Post
Yes.
Awesome! Thanks.

I will look at the board closer when I have it in front of me. Can it be done with one straight cut across the board, or are there components that need to be cut around?

This is good new for keeping those LDRs cool while reaping the benefits of the hotrodded power supply.

Great!
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