Schematic diagram

Matthewong · 6th August 2005, 04:03 PM

Does anyone out there has a schematic diagram for a simple power amplifier. I'm new to this forum and also to this kind of audio gadget, but i'm very interested in it, so i hope that you guys can help to build my new power amp, but first, I need a good and simple power amp schematic diagram.

Nelson Pass · 7th August 2005, 01:18 AM

Maybe you could tell us a little more about what kind of
amp you want.

rnrss · 7th August 2005, 02:55 AM

Quote:

Originally posted by Matthewong
Does anyone out there has a schematic diagram for a simple power amplifier. I'm new to this forum and also to this kind of audio gadget, but i'm very interested in it, so i hope that you guys can help to build my new power amp, but first, I need a good and simple power amp schematic diagram.

http://home.indy.net/~gregdunn/dynaco/components/ST120/

http://www.tnt-audio.com/ampli/hawk_a18_e.html

http://search.ebay.com/mcintosh-mc_W0QQfnuZ1

http://www.amplifierbuyer.com/highpo...tateamplifier/

www.one-electron.com/FC_Consumer.html

Nelson Pass · 7th August 2005, 04:07 AM

Wow, thanks for the reference.

jleaman · 7th August 2005, 04:58 AM

WEll it was a few days ago and i was reading my audio express magazine and i was reading artical on some audio filter's and stuff i go and flip the page to read the next one and , I see this big add for www.passdiy.com Sweet.. pass labs has some add's now advertizing there diy stuff..

rnrss · 7th August 2005, 11:28 AM

Here are a few more from my archives

buck a watt kit

http://www.swtpc.com/mholley/Catalog...atalog%20Pages

70w mos amp
http://wiredworld.tripod.com/tronics/mosfet_amp.html

couple watt amps
http://www.techlib.com/electronics/audioamps.html

http://ludens.cl/Electron/audioamps/AudioAmps.html

GRollins · 7th August 2005, 11:19 PM

Well, let's see, there's simple and then there's simple...
I once knew a fellow who rebuilt engines for fun. He claimed it was simple. From my point of view, there were way too many parts to keep track of. If I had a Chiltons or something, I might be able to do it, but he did it with no reference at hand.
It's the same with electronics. Once man's simple is another man's confusion.
Now, the first thing to ask is: How much power were you thinking of?
1000 watts? That's a little ambitious. Not in the simple category. Even if the circuit is simple enough conceptually, it's going to involve a lot of money and the consequences of a bad solder joint could be spectacular in the fireworks sense of the word. Crushing disappointment and financial ruin are not good memories to take from your first project.
If it's a first project, then a more modest 10 or 20W amp would be a good bet. The relationship between watts and volume is not linear, so although it won't crack the plaster in the ceiling, it will play louder than you might expect, especially if your speakers are efficient.
There are numerous small amps here and there on the web, but the pedigree of some of the mutts is questionable.
In the running for Simplest Amp Possible is the Son of Zen. Two transistors and a few resistors. Can't beat that for simplicity. But...it runs seriously hot (by design) and requires a power supply the size of a Volkswagon. Okay, I'm exaggerating, but it's not necessarily the best choice for a first project. One notch up the complexity scale is the Zen. A few more parts, but a lot more versatile in terms of matching with speakers. Not a bad choice.
Where to find? www.passdiy.com
There have been something on the order of about seventy trillion Zens built and a large percentage of the builders are available right here to answer questions if you get stuck.
Build a Zen and see how you like it. Afterwards, you may feel like making a run at something more elaborate.
Enjoy.

Grey

Mark A. Gulbrandsen · 8th August 2005, 02:00 AM

If you're new to this hobby then the Pass(or is that Grollins) Mini is hard to beat. You might want to contact jleaman above in this thread for more info. Perhaps he has a few kits left over?????

Mark

jleaman · 8th August 2005, 02:07 AM

Quote:

Originally posted by Mark A. Gulbrandsen
If you're new to this hobby then the Pass(or is that Grollins) Mini is hard to beat. You might want to contact Kleaman above in this thread for more info. Perhaps he has a few kits left over?????

Mark

that's jleaman..

kleaman would be my mom..

GRollins · 8th August 2005, 02:26 AM

Call it Rollins after Pass. The Mini-A was a quick take on shrinking a real Aleph into a smaller package. Nelson did all the hard parts. I just kinda refigured a few things.
A Mini-A is somewhat like a Zen with a front end. The parts count is a little higher. It's a little more efficient. The specs are presumably a little better than a Zen, but do not make the mistake of assuming that means it necessarily sounds better than a Zen--there's more to this than the numbers would have you believe.
It was just a toy that I threw together in order to have a building block to use whilst pursuing the Aleph-X project.

Grey

6th August 2005, 04:03 PM	#1
Matthewong diyAudio Member Join Date: Jun 2005 Location: KL	Schematic diagram Does anyone out there has a schematic diagram for a simple power amplifier. I'm new to this forum and also to this kind of audio gadget, but i'm very interested in it, so i hope that you guys can help to build my new power amp, but first, I need a good and simple power amp schematic diagram.

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7th August 2005, 01:18 AM	#2
Nelson Pass The one and only Join Date: Mar 2001	Maybe you could tell us a little more about what kind of amp you want.

7th August 2005, 04:07 AM	#4
Nelson Pass The one and only Join Date: Mar 2001	Wow, thanks for the reference.

7th August 2005, 04:58 AM	#5
jleaman Banned Join Date: Apr 2002	WEll it was a few days ago and i was reading my audio express magazine and i was reading artical on some audio filter's and stuff i go and flip the page to read the next one and , I see this big add for www.passdiy.com Sweet.. pass labs has some add's now advertizing there diy stuff..

7th August 2005, 11:28 AM	#6
rnrss diyAudio Member Join Date: Jul 2005 Location: na	Here are a few more from my archives buck a watt kit http://www.swtpc.com/mholley/Catalog...atalog%20Pages 70w mos amp http://wiredworld.tripod.com/tronics/mosfet_amp.html couple watt amps http://www.techlib.com/electronics/audioamps.html http://ludens.cl/Electron/audioamps/AudioAmps.html

7th August 2005, 11:19 PM	#7
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Well, let's see, there's simple and then there's simple... I once knew a fellow who rebuilt engines for fun. He claimed it was simple. From my point of view, there were way too many parts to keep track of. If I had a Chiltons or something, I might be able to do it, but he did it with no reference at hand. It's the same with electronics. Once man's simple is another man's confusion. Now, the first thing to ask is: How much power were you thinking of? 1000 watts? That's a little ambitious. Not in the simple category. Even if the circuit is simple enough conceptually, it's going to involve a lot of money and the consequences of a bad solder joint could be spectacular in the fireworks sense of the word. Crushing disappointment and financial ruin are not good memories to take from your first project. If it's a first project, then a more modest 10 or 20W amp would be a good bet. The relationship between watts and volume is not linear, so although it won't crack the plaster in the ceiling, it will play louder than you might expect, especially if your speakers are efficient. There are numerous small amps here and there on the web, but the pedigree of some of the mutts is questionable. In the running for Simplest Amp Possible is the Son of Zen. Two transistors and a few resistors. Can't beat that for simplicity. But...it runs seriously hot (by design) and requires a power supply the size of a Volkswagon. Okay, I'm exaggerating, but it's not necessarily the best choice for a first project. One notch up the complexity scale is the Zen. A few more parts, but a lot more versatile in terms of matching with speakers. Not a bad choice. Where to find? www.passdiy.com There have been something on the order of about seventy trillion Zens built and a large percentage of the builders are available right here to answer questions if you get stuck. Build a Zen and see how you like it. Afterwards, you may feel like making a run at something more elaborate. Enjoy. Grey

8th August 2005, 02:00 AM	#8
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	If you're new to this hobby then the Pass(or is that Grollins) Mini is hard to beat. You might want to contact jleaman above in this thread for more info. Perhaps he has a few kits left over????? Mark

8th August 2005, 02:26 AM	#10
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Call it Rollins after Pass. The Mini-A was a quick take on shrinking a real Aleph into a smaller package. Nelson did all the hard parts. I just kinda refigured a few things. A Mini-A is somewhat like a Zen with a front end. The parts count is a little higher. It's a little more efficient. The specs are presumably a little better than a Zen, but do not make the mistake of assuming that means it necessarily sounds better than a Zen--there's more to this than the numbers would have you believe. It was just a toy that I threw together in order to have a building block to use whilst pursuing the Aleph-X project. Grey