Dx Supply, output adjustable, stabilized power supply - Page 7 - diyAudio
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Old 28th February 2013, 01:11 PM   #61
wiljj78 is offline wiljj78  Philippines
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Default Very nice 3D!

Is this the final version of DX supply???

Regards,
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Old 28th February 2013, 01:32 PM   #62
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Willy!!! what up man, no is just a 3D prototype of it mister Zimmer will make a version of it so this is just a montage not actually final product.

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Juan
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Old 28th February 2013, 02:00 PM   #63
potepuh is offline potepuh  Slovenia
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Why not consider TO220 diode be used for bridge in the layout?
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Old 28th February 2013, 02:19 PM   #64
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well that will be mister Zimmer who is going to decide that now, but is possible to make it that way too.

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Juan
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Old 28th February 2013, 02:36 PM   #65
wiljj78 is offline wiljj78  Philippines
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Default Hello Juan... I like your 3D image man! looks cool...

I can’t wait to build that PSU, but as Uncle Charlie mention from his previous post that his going to upgrade or make it even better the way it is, so I’m just waiting the final version of it before I build, anyway my Stereo Super A are waiting for their partners, cool stuff dude… Thanks for sharing….

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Old 28th February 2013, 07:30 PM   #66
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Default Juan sent me pictures...then you have a video made with them

Dx Power Supply - YouTube

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 2nd March 2013, 10:51 AM   #67
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Default Zimmer made a first layout and was not approved and he is doing it again

T0220 may need more room...more clearance than this thin vertical bridge rectifier...we are fighting to reduce size, because this represents more clearance, more free space and room to install several pcboards inside an enclosure.

To operate 2 ohms we gonna need two Dx Supplies inside..and big heatsinks to both of them.... also two amplifier channels having huge heatsinks and power transformers.... we have worries not to make a "Transatlantic sized amplifier"

This amplifier can put out more than 300 watts RMS each channel, undistorted, at 2 ohms loads..continuous, with low distortion...so...it is really a huge power..because if you accept distorted peaks this may represent 800 watts or more of audio power.... this means much more than 1000 watts of power consumption... a lot of heat to dissipate..all this needs room...if we do not think about then you will have damaged transistors..so..this is serious thing to be analised with a lot of care.

Juan know how we analise the stuff in details.

Soon he will have a new layout...first one had some clues to fix.

I will keep you all informed, there are several orders from outside Brasil waiting for these pcboards too.

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg

Last edited by destroyer X; 2nd March 2013 at 10:54 AM.
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Old 2nd March 2013, 07:30 PM   #68
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Default I am making changes together Zimmer

We decide to make two boards side by side..two supply boards..in a such way you can split them in two or to use them together.

Why two supplies?

- This amplifier drains a lot of current if you push it hard into the limit (2 ohms) and no way to a single supply hold the job...to do that we have to put a lot higher voltage into the regulator input and having huge voltage drop into the series pass transistors we would have excessive heat...so, the decision was to use two supplies instead of a single one to the ones wants to push it hard.

The ones do not want to push it hard, then can split the pcboard and to use a single one, having an extra regulator to other kind of use, or other amplifiers or laboratory supply application.

Using 8 ohms we can use a single supply...even 4 ohms is possible with a single supply..but if you have two gonna be better because you gonna split the heat in several transistors in the place to use two, or to install extra transistor out of the pcboard.

Board shape gonna be different compared to the Juan's pcboard, as we decide to obbey if possible, the golden rule created by the ancient Greeks (1.6 ratio of lenght and width)..the rule of beauty.

This is what is going on.

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 3rd March 2013, 12:03 PM   #69
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Default TEST!... Dx Super A plays 4 hertz with and without the Dx Supply

Dx Super A - 4 hertz with and without the Dx Supply - YouTube

Could you perceive the difference?

regards,

Carlos
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Power supply; ripple, filter, noise, stability and the use of capacitance multiplier... Portuguese and English; https://www.youtube.com/watch?v=sSm0ku1eIgg
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Old 3rd March 2013, 01:32 PM   #70
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Default We are changing our minds about the dual supply

We are discussing.

I do think we may use two supplies instead of one..not sure about the twin circuit board because of manufacturer..we gonna see that.

regards,

Carlos
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