Schematic 500 w

fjromero · 9th December 2006, 08:06 AM

Somebody has data of this amplifier.
Greetings

peranders · 9th December 2006, 01:17 PM

It looks rather conventional with conventional data also. Not rocket science. Where have you got this schematic?

Jan Dupont · 9th December 2006, 03:37 PM

I think that I have seen this schematic here on diy some time ago

mikeks · 9th December 2006, 06:49 PM

It's a poor design. Bin it.

Greg Erskine · 9th December 2006, 09:14 PM

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.

regards

djk · 10th December 2006, 04:40 AM

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.

peranders · 10th December 2006, 06:34 AM

Quote:

Originally posted by mikeks
It's a poor design. Bin it.

Mike, do you have any alternative to suggest?

9th December 2006, 08:06 AM	#1
fjromero diyAudio Member Join Date: Oct 2006	Schematic 500 w Somebody has data of this amplifier. Greetings

9th December 2006, 01:17 PM	#2
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	It looks rather conventional with conventional data also. Not rocket science. Where have you got this schematic? __________________ /Per-Anders (my first name) or P-A as my friends call me

9th December 2006, 03:37 PM	#3
Jan Dupont diyAudio Member Join Date: Apr 2003 Location: Copenhagen, Denmark	I think that I have seen this schematic here on diy some time ago __________________ Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com

9th December 2006, 09:14 PM	#5
Greg Erskine diyAudio Member Join Date: Jan 2002 Location: Sydney/Australia	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. regards __________________ Greg Erskine

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9th December 2006, 06:49 PM	#4
mikeks Account Disabled Join Date: Jun 2004 Location: Animal farm	It's a poor design. Bin it.

10th December 2006, 04:40 AM	#6
djk diyAudio Member Join Date: Feb 2001 Location: USA	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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