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Old 9th December 2006, 08:06 AM   #1
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Default Schematic 500 w

Somebody has data of this amplifier.
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Old 9th December 2006, 01:17 PM   #2
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It looks rather conventional with conventional data also. Not rocket science. Where have you got this schematic?
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Old 9th December 2006, 03:37 PM   #3
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I think that I have seen this schematic here on diy some time ago
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Old 9th December 2006, 06:49 PM   #4
mikeks is offline mikeks  United Kingdom
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It's a poor design. Bin it.
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Old 9th December 2006, 09:14 PM   #5
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hi fjromero,

Your schematic looks like an earlier version of this amp (Studio 350):

http://www.siliconchip.com.au/cms/A_100503/article.html
http://www.siliconchip.com.au/cms/A_...ntArticle.html

http://www.altronics.com.au/index.as...=item&id=K5185

There has been a few threads about this amp.

The drawing style of the schematic suggests it is from the same magazine.

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Old 10th December 2006, 04:40 AM   #6
djk is offline djk
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Looks basically OK to me.

A few minor improvements:

A film cap for the input.
A 0.1µF film cap in parallel with the 100µF in the feedback loop.
A 0.1µF film cap in parallel with D1 and D2.
Increase the cap in parallel with Q9, up to as much as 220µF.
Add a series resistor in the base of Q6, try 270 ohms.
Add a 2.2µF cap in parallel with the emitter resistor for Q10, Q11.
Change ZD1 to an LED with the cathode connected to the emitter for Q7.
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Old 10th December 2006, 06:34 AM   #7
Electrons are yellow and more is better!
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Quote:
Originally posted by mikeks
It's a poor design. Bin it.
Mike, do you have any alternative to suggest?
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