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Old 12th October 2012, 12:17 PM   #7101
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Default Dx Custom is the name and i am starting to make it

Here you have a video...next video today.

Dx Custom - 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 12th October 2012, 05:21 PM   #7102
Riff is offline Riff  Indonesia
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Quote:
Originally Posted by destroyer X View Post
It almost ready to 4 ohms loads...more than 700 watts RMS at 35 hertz with less than 0.6% distortion.

To the ones are preparing pcboard:

Supply rail condensers are huge...left side (input side) is 1000uf/100V and to the right side we have 2200uf/100V...they are big in size...and soon they gonna have small capacitor in parallel...circuit is not ready.

The heat sensor diodes are high speed TO220 devices, made of plastic (have plasticity, you can make shape with that material) and the internal junction is electrically insulated from the heatsink.

I will try big transistors (output units) as drivers and maybe as VAS...so...it is not a good idea to prepare pcboard for a while.

regards,

Carlos
we wait for the final scheme....regards
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Old 13th October 2012, 01:55 PM   #7103
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Default Dx Custom give up... the powerfull amplifier for bass is not that powerfull

Was not approved.... a video explains:

Dx Custom not approved! - 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 13th October 2012, 11:41 PM   #7104
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I really want it to have this created but not always things come out the way you want it, this is what I have so far on the layout I really want to see it completed.
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File Type: png vistual board3.png (458.1 KB, 394 views)
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Old 14th October 2012, 02:49 PM   #7105
evette is offline evette  Canada
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Beautiful Works you truly are an artist. Evette
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Old 14th October 2012, 03:13 PM   #7106
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Default Yes... he is very good...also his videos are nice

You will not believe if i say he made an overhaul of his old Toyota Corolla.

This guy knows what is good...first the Toyota Corolla and second a Dx amplifier

His hands are magic.

regards,

Carlos
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Old 14th October 2012, 03:21 PM   #7107
evette is offline evette  Canada
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Also his hands. Evette
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Old 14th October 2012, 05:41 PM   #7108
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Well I have the heat sink ready, for now I just design a new power supply "simple" not complicated and is unregulated, I took the idea from a eBay power supply that look interesting so I making my own one, is a double side board and I'm going to try etching it but I need to get me a laser printer first lol hey guys if you have any ideas that can you share with me let me know.

Regards
vargasmongo3435
Attached Images
File Type: png top 40.png (171.9 KB, 320 views)
File Type: png bottom 40.png (177.3 KB, 296 views)
File Type: png virtual view C1.png (249.0 KB, 292 views)
File Type: png virtual view C2.png (134.0 KB, 272 views)
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File Type: pdf universal power supply C1 mirror.pdf (6.7 KB, 58 views)
File Type: pdf universal power supply C2 mirror.pdf (26.4 KB, 50 views)

Last edited by vargasmongo3435; 14th October 2012 at 05:51 PM. Reason: missing files
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Old 14th October 2012, 07:38 PM   #7109
AndrewT is offline AndrewT  Scotland
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you need a connection for the centre tap at the rectifier end of the capacitor bank.
I would also "neck" (narrow) the common ground strip between the first pair of caps and the second pair. This may help reduce the charging pulses that will try to travel towards the output in search of the lowest impedance.
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Old 14th October 2012, 08:12 PM   #7110
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the board is double side, the center tap is already connected to the center of the board, the red is the top side of the board and the blue one the bottom but if I'm wrong I will check it again, when you refer to "narrow" is the blue one or the red one that has to be change it to avoid the pulses?

Regards
vargasmongo3435
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Last edited by vargasmongo3435; 14th October 2012 at 08:16 PM. Reason: error writting
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