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Old 24th February 2011, 04:57 PM   #1711
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Default These are stereos inside enclosure..i have build more 12 channels

during the prototype work...these are final ones..needing some details only.

123 stereo sets of boards sold inside group buys in Brazil and inside this same forum... a very few have etched their own board...less than 5 percent.

Rudi have sold almost 40 stereo sets i suppose.... red board's group buy from Rudi.

It is big and heavy...i could measure 340 watts RMS each channel at 4 ohms..distortion at this power reaches 1 percent.... at 150 watts the distortion is around 0.003% THD - 8 ohms..it is rated as 100 watts each channel.... underated alike Sansui did.

We have also offered in brazil a kit containing protector boards having delayed insertion and DC detector a transistorized unit (no chips).... a surge protection board (only in brasil) and supply boards.

Wanna see them...visit here:

*

regards,

Carlos
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File Type: jpg Big and very heavy.jpg (205.6 KB, 1572 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; 24th February 2011 at 05:09 PM.
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Old 24th February 2011, 11:53 PM   #1712
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Originally Posted by destroyer X View Post
during the prototype work...these are final ones..needing some details only.

123 stereo sets of boards sold inside group buys in Brazil and inside this same forum... a very few have etched their own board...less than 5 percent.

Rudi have sold almost 40 stereo sets i suppose.... red board's group buy from Rudi.

It is big and heavy...i could measure 340 watts RMS each channel at 4 ohms..distortion at this power reaches 1 percent.... at 150 watts the distortion is around 0.003% THD - 8 ohms..it is rated as 100 watts each channel.... underated alike Sansui did.

We have also offered in brazil a kit containing protector boards having delayed insertion and DC detector a transistorized unit (no chips).... a surge protection board (only in brasil) and supply boards.

Wanna see them...visit here:

*

regards,

Carlos

Very nice! The way I like it...a power switch, a volume control and an input selector!.What else can we ask for eh?.
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Old 27th February 2011, 10:49 AM   #1713
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Default here is my 5w class a single ended

you all know the ZCa,5w single ended class a.


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Last edited by huseying; 27th February 2011 at 10:52 AM.
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Old 27th February 2011, 11:36 AM   #1714
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Default Very good...congratulations Huseying

Thank you as you have shown us your amplifier.

Thank you also Lanchile.

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 27th February 2011, 04:46 PM   #1715
felixx is offline felixx  Romania
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For the same topology can you increase the power for 50W on 8 ohms?
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Old 27th February 2011, 05:24 PM   #1716
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Default Ahahahahha..... hot isn't it?

After you produce an amplifier, respecting this style and topologie, producing 50 watts RMS...then Artic and Antartic will become this way (picture).

These sweet rose river waters will be boiling and plants will continue green while cooking.

regards,

Carlos
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File Type: jpg Veeeery hot!.JPG (29.2 KB, 248 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; 27th February 2011 at 05:28 PM.
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Old 27th February 2011, 06:26 PM   #1717
felixx is offline felixx  Romania
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Quote:
...then Artic and Antartic will become this way (picture).
After that,Brasil and Romania will be one...........finaly I will eat,sorry,meet some "hooty" chocolate
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Old 27th February 2011, 07:19 PM   #1718
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After that,......finaly..."hooty" chocolate
Maybe we could tag team to speed things up.
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Old 5th March 2011, 02:23 AM   #1719
jgray is offline jgray  United States
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Here are some pictures of my Class A Amp that I recently completed. My sons said it sounded "Not Too Bad" so I call it the NTB
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File Type: jpg IMG_3648 (640x457).jpg (131.5 KB, 333 views)
File Type: jpg NTB Class A Amp (2).jpg (114.9 KB, 386 views)
File Type: jpg NTB Class A Amp inside (640x480).jpg (217.2 KB, 668 views)
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Old 5th March 2011, 07:15 AM   #1720
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Here are some pictures of my Class A Amp that I recently completed. My sons said it sounded "Not Too Bad" so I call it the NTB

is this a headphone amplifier ??? since everything loooks kinda small for a class A design ....Unless you have 130db speakers ...
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