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Old 18th March 2014, 02:01 PM   #541
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For the input im using a balanced wire.

blue +IN / white -IN / shield AGND on SDA-400 side
and on the DAC side I connect white cable and shield together. I'm using this setup because I don't have small jumpers avalaible. Since I'll have to buy some resistors I'll buy some jumpers in the same time

Roberto now that we know the resistors has burn what do you think could have caused this?
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Old 18th March 2014, 02:43 PM   #542
AP2 is offline AP2  Italy
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Quote:
Originally Posted by PandazYa View Post
For the input im using a balanced wire.

blue +IN / white -IN / shield AGND on SDA-400 side
and on the DAC side I connect white cable and shield together. I'm using this setup because I don't have small jumpers avalaible. Since I'll have to buy some resistors I'll buy some jumpers in the same time

Roberto now that we know the resistors has burn what do you think could have caused this?
Smoke the res,obvious amp turn in big Unbalanced condition. in your case I'm sure a auto-oscillation. (or you have smoked power mosfet) but in this case, the dps-400 stop,and is not able to re-start (in presence of short-cut I mean). also,you can measure simple with tester, from Power DC pin to gnd in SDA, if have short-cut just before you switch-on. (in presence of short-cut,or current >500mA,the dps-400 LED, blink continuos,smps not start ).

Input need very short connection to AGND under SDA or via JMP.
... with your connection, you have create a perfect "Link" to capture signals.
I have protected very well this amps...hope , also, The output stage (toroidal incluse) it's made for big current output or 500-600w quiet.
Maybe,other diy with other types of amps and smps , in the same circumstances , would have destroyed smps and amp ...and speaker. I mean,the protections are very important.

Last edited by AP2; 18th March 2014 at 02:59 PM.
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Old 19th March 2014, 06:17 PM   #543
AP2 is offline AP2  Italy
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Hi, this is the kit SDA-400-Mono € 120 + UPS
Also, the Stereo sda with Nichicon, as I said before. € 230 + UPS
Available identical at 120Vac (this version uses direct conversion on the DPS-400 (no voltage doubler in main filter cell), is unique in offering performances as power and dynamics, far away from the transformer or traditional smps.

Info
These which I have shown, are products ready (final test need) for
DrizztDo & Vis

Regards
Attached Images
File Type: jpg Mono-SDA400-Kit.jpg (181.6 KB, 230 views)
File Type: jpg DualMono-SDA-400-Kit.jpg (145.8 KB, 233 views)
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Old 20th March 2014, 12:36 AM   #544
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Looking forward to it !
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Old 20th March 2014, 05:00 PM   #545
Vis is offline Vis  Switzerland
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Yeah, me too !!
Yummy

Vis
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Old 26th March 2014, 12:44 PM   #546
AP2 is offline AP2  Italy
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Hi,

To Vis & DrizztDo: package ready waited today UPS.
As I have, send track via pm.

Well, I received some email of Happy customers with this SDA/MDA Amplifiers.
Thanks to all
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Old 1st April 2014, 07:30 AM   #547
Vis is offline Vis  Switzerland
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Hello,

Just a quick message to say that I received my package yesterday.
I only had time to quickly unpack it. That took some time due to the quality of the packaging.
I will have more time this week-end to look at it in detail.

Thanks Roberto.

I am looking forward to try those amps.

Vis
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Old 3rd April 2014, 07:56 AM   #548
tinitus is offline tinitus  Europe
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posts removed

please consider this is public space
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no comments please
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Old 3rd April 2014, 10:15 AM   #549
AP2 is offline AP2  Italy
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Hi,
At end, is not bad that customers see "how is made" the compact Dps-400.

I want to explain in a few steps, some design strategies that will certainly have raised the cost slightly, but they allowed me to obtain a very low irradiation RFI / EMI and Ultra Low conduction of harmonics, via DC output (essential for audio).

We start just with small module Osc./Driver...next step.

Regards
Attached Images
File Type: jpg DPS-400-Standard-1.jpg (250.7 KB, 114 views)
File Type: jpg DPS-400-Standard-2.jpg (377.4 KB, 111 views)
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Old 5th April 2014, 02:24 PM   #550
AP2 is offline AP2  Italy
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Hi Vis,
very thank for shared your products.
If you need some advice, I'm happy to help.

P.S. maybe these photos were better on the thread of the GB. also for discussions on the assembly, may also be valid for the other.

apart, this thread will become very hot also. eheh!
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