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Old 5th July 2010, 05:02 PM   #151
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Default Too much big to be uploaded Kanwar

Also i have no Brazilian music in Flac format...the one may have is Mr. Professor.

I have one, but was traditional PCM format (wave)...and the one is even bigger.

My upload speed is slow.... maximum of 100 kbps.... the upload speed is 10 times bigger.

To send Flac or wave, represents 30 minutes of upload. (average)

regards,

Carlos

.................................................. .................................................. ...

BTW... is really you that is using Workhorse nickname?.... you seem different.... or your brother, or even Sami is using by you?
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File Type: jpg 30 minutes one music.jpg (679.6 KB, 591 views)
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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; 5th July 2010 at 05:09 PM.
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Old 5th July 2010, 05:05 PM   #152
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Okk Carlos
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Old 5th July 2010, 05:39 PM   #153
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Default My internet, dear Kanwar, also does not attach files bigger than 25 megabytes

So, i have tried but i could not.

Wave files and Flac files, usually are bigger than 50 Megabytes.

Quality difference is huge..... Flac is much better than MP3 320K

I have no FTP adress to send you computer to computer.

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 5th July 2010, 05:42 PM   #154
a.wayne is offline a.wayne  United States
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Nice pics of the DIY Brazil event carlos .............
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Old 5th July 2010, 08:15 PM   #155
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Default Thank you Wayne..... by your interest to see my videos

Thank you,

regards,

Carlos

YouTube - DIY Fest Rio 2010 - Dx Blame ST
YouTube - DIY Fest Rio 2010 - Farjon fotos
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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 5th July 2010, 11:51 PM   #156
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Default This brazilian friend made Dx Blame test using DAC and a pré amplifier

A tube pré amplifier called Aikido.

His name is Hudnes, he lives in Maceio, Capital of the state of Alagoas.... Northeast of brazil too... this state touches mine, has border with Pernambuco at south of my place.

YouTube - MY DIY STEREO, DX BLAME ST, AIKIDO

Video is not fine...but audio is nice.

enjoy,

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 8th July 2010, 07:17 AM   #157
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Dear Carlos, Is it possible for me to use +-25VDC for Blame ST, I don't need the full power from the amp, I guess with 25VDC I will get around 50W in to a 8 ohm Load (Which will be very very Loud) with this amp, Am I correct.
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Old 8th July 2010, 08:55 AM   #158
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by zeraphine View Post
Am I correct.
no.
A 50W into 8ohm amplifier must output 20Vac to an 8r0 load. P=Vac^2/R
The peak voltage will be 28.3Vpk.
You will lose ~2V through the amplifier so the PSU should supply ~+-30Vdc, when fully loaded, to the amplifier power terminals.
The PSU voltage will rise ~4V when unloaded. Expect the PSU to be ~+-35Vdc for a 50W amplifier.

If you start with +-25Vdc, then maximum power is likely to be 20W to 25W into 8r0.

If you listen to average levels of ~-20dB ref maximum power then your 25W amplifier will be delivering 250mW to the speaker when turned up to maximum with that 20dB overhead to prevent clipping of peak transients.
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Old 8th July 2010, 10:33 AM   #159
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Quote:
Originally Posted by AndrewT View Post
no.
A 50W into 8ohm amplifier must output 20Vac to an 8r0 load. P=Vac^2/R
The peak voltage will be 28.3Vpk.
You will lose ~2V through the amplifier so the PSU should supply ~+-30Vdc, when fully loaded, to the amplifier power terminals.
The PSU voltage will rise ~4V when unloaded. Expect the PSU to be ~+-35Vdc for a 50W amplifier.

If you start with +-25Vdc, then maximum power is likely to be 20W to 25W into 8r0.

If you listen to average levels of ~-20dB ref maximum power then your 25W amplifier will be delivering 250mW to the speaker when turned up to maximum with that 20dB overhead to prevent clipping of peak transients.
That's so informative, thanks so much andrew
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Old 8th July 2010, 10:33 AM   #160
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Default Yes...Andrew is right about the technical point of view

In the reality, audible difference when you compare a 25W amplifier with another one with 50W output is not clear..not huge....not easy to perceive...so....will play loud as you have imagined....about they can play loud and powerfull using 25 volts?...the answer is yes.

regards,

Carlos
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