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-   -   AudioPower DPS-500-DA in GB (http://www.diyaudio.com/forums/vendors-bazaar/250686-audiopower-dps-500-da-gb.html)

AP2 6th February 2014 03:29 PM

AudioPower DPS-500-DA in GB
 
1 Attachment(s)
Hi guys,
I can only manage version DPS-500/DA up to + /-56V 10A.

We must consider the voltage drop under transient audio that can offer this smps. For this reason, the measures put with typical mosfetAmp (2 mosfets per side) and 4R, -- 2.7 R load, just to see how much power we have.
The behavior I think is very well known, thanks to the two FB (one per side),and power regulator linear,synchronized, (not pwm use),also the balance is very fast, as the output very clean with 8A continuous.
well, coming soon new measures.

The price is € 230 for a couple. (includes as photo).
The amount is fixed at 25pcs for GB, an opportunity to have a smps created for amplifiers and at the same time save a little money, (maybe there is a free amp as gain).. :)

Continue ...

AP2 16th February 2014 01:20 PM

3 Attachment(s)
Hi,
Some first measure on DPS-500-DA/60V well tuned for Amateur Use.
I wait the first qty of all Nichicon Audio-Grade caps for this version for Tuesday.
-------
These measures demonstrate what he is capable technology.
So we have a smps , compact (30mm Height) , absolutely clean (- 78dB the fundamental 150kHz ) , Able to withstand large surge currents repeatedly , such as audio transient , with no compression on the envelope .
In terms simple, we can offers of course, excellent dynamics with unquestionable realism on fast attacks ( timbre of musical instruments) .
Also, the geometry of the audio envelope is closer to the real one, with a result of greater SPL product.
Note: All those who have, for example, the DPA-400/F3, ask if it is 800w :) but we measure only 320w at 4R SIN
These three performances, (sorry for some, for my statement ) , it is not subjective when listening .
The problem is , that we are not trained to listen psu that does not drop under the transients , the reason is simple ... we have not , before the DPS -500- xx .
-------------------------------------------------- -
The image sound ( stereo ) , height of the stage and other definitions have nothing to do with the PSU .
For sure, I will not spend my time trying to convince those of the old school.
maybe there a reason... why not have AudioPower smps normal? :D

P.S. The third pic (SIN- 4R Clip) , is outside of the physical, consider this smps , uses only 470uF in the Main filter cell.
Measure and photo Continue...

Regards

AP2 18th February 2014 11:09 AM

1 Attachment(s)
Hi Guys,

In center of your case... :)

Continue...

Regards

mj777 18th February 2014 01:53 PM

Hi Sir Roberto, I'm interested to buy one unit with 56 volt dc rail, with 230 volt ac source, I want to try it on my class AB amp. just tell me the cost of one unit plus shipping to Dubai U.A.E.

regards,
Marjohn

AP2 18th February 2014 02:50 PM

1 Attachment(s)
Hi,
Et voila! ...The version I dedicated amateurs.
The difference is immediately listenable at 5w (not as you think, just near the region of the clip, or just Increase the power on amps).
well, my job is done, as you can see I chose Nichicon audio grade for this version, I have to say that the difference is much more than what I thought, I had to completely revise the levels and constants in the two feedback, including current limiting .
At this point, we have set 1V rms drop under load, regardless of whether continuous or burst.

...Now it takes a very special Amp

Regards

AP2 18th February 2014 05:22 PM

Quote:

Originally Posted by mj777 (Post 3824141)
Hi Sir Roberto, I'm interested to buy one unit with 56 volt dc rail, with 230 volt ac source, I want to try it on my class AB amp. just tell me the cost of one unit plus shipping to Dubai U.A.E.

regards,
Marjohn

Hi Marjohn,
I can offer this new "special Edition" of THE DPS-500/DA-56V in GB at 136+32 UPS 3 days. products ready.

If you not need immediately, please add your name on thread.
I want show some measure and start the GB.

audiorasp 18th February 2014 06:14 PM

Hi AP2,

How would this supply work for the diyAB 150w "Honey Badger" amp ?

Thanks

AP2 19th February 2014 06:39 AM

Quote:

Originally Posted by audiorasp (Post 3824474)
Hi AP2,

How would this supply work for the diyAB 150w "Honey Badger" amp ?

Thanks

I do not have this amp, I just took a look now.
Certainly it is an amp that does not have problems PSRR, but like all amps, voltage requires a firm and clean. the exact reason, why I developed this new technology smps. one draw each amplifier, especially if using BJT, may offer a new sound, very dry even at low power, as "Toc" instead of "Tump", in an example of the big drum. hahaha sorry, I can not find the right words.

I hope that the amateurs to which I have devoted my time, understand quickly that we've had for 30 years, the linear psu with large capacitors bank, which failed, however, after 3ms, and in the case of continuous envelope, as classic music, not can no longer charge the capacitors. but the choice is forced, considering there is no other alternative.
Now there is. :)

Theodosis O. 19th February 2014 08:17 AM

Hi AP2,

Can one adjust the output voltage to +/-45 volt by turning the trimmer on-board ?

How many DPS 500/DA modules are needed to power a stereo First One amp. in
bridge configuration (total 4 FO modules) and have some headroom ?

Thanks

AP2 19th February 2014 09:18 AM

Quote:

Originally Posted by Theodosis O. (Post 3825236)
Hi AP2,

Can one adjust the output voltage to +/-45 volt by turning the trimmer on-board ?

How many DPS 500/DA modules are needed to power a stereo First One amp. in
bridge configuration (total 4 FO modules) and have some headroom ?

Thanks

Hi,
Thank you for this question , this allows me to illustrate a voltage table , in reference to unreg psu . can help you choose the correct voltage .
The difference part from the lower voltage as 4V , up to 8V , in the case of 60V .
this means , for example your 45V , 41V can be chosen in the case of the DPS -500 . or should know that the excess power , if voltage is 45V .
Soon I'll put a simple software , where you can enter also,the total rdson Vs. rail (or emitter resistance fr bjt) , and you can read some parameters related to the load , even dynamic . Obviously the software is free .

The trim is used to adjust essentially about 3V total in the final test. can be used.
(the required voltage is obtained with the trim at 50 %)

The DPS-500/DA has a precise differential limiter , delay of 120ms 10A ( peak 14Amp allows repeatable) .

There are no problems if the current flows simultaneously in the two outputs (as bridge amp)
The DPS -500- xx series, loses the ultra fast adjustment in case the current is simultaneously on the two outputs , but with intensity not equal ( in case of stereo) .
But we have 1000 reasons for wanting a psu for each channel. :)

In the meantime , if anyone wants to calculate the power of the load, just know that I have fixed the drop vs.load between 10mV to 1V max (at 10A continuos )
As writed on the first pic, the voltage can be selected (at purchase ) between 36V to 60V , independant of 110/230Vac.

Not knowing what load (in your example) link your full balanced amps, I recommend using 1 DPS-500 / S in this case, for a couple of Amps.


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