Please help a chip amp guy

raindog · 31st January 2010, 09:58 AM

Hello everybody,

I was wondering if anybody has a schematic for a simple 2-3 watts solid state amp.Personaly I like chip amps but a few weeks ago a friend asked me to build him a low power guitar practice amp and pretty soon I discovered that low power chip amps ( like lm386 or tea2025 ) don't ,,like" guitar effects ( especialy distorsion ) - I think the protection circuts kick in -. And since my friend doesn't want to change his music style to something more mellow

I hope someone can help.

Paul

jaycee · 31st January 2010, 10:41 AM

if it's just a practice amp for headphones you can probably use a 5532 opamp to drive the headphones directly. Alternately you could use a pair of transistors as a current buffer on the end of the opamp to provide a bit more juice.

Headphone Amplifier is an example of the circuit I mean. You could scale this down ab it and drive it from 2x9V batteries if you want it portable. Instead of BD139/140 you could use something like MPSA06/56.

raindog · 31st January 2010, 11:05 AM

Thanks jaycee, I think Mr. Elliott's design will be perfect for the job.
I'll start building as soon as I have all parts.

31st January 2010, 09:58 AM	#1
raindog diyAudio Member Join Date: May 2003 Location: Timisoara	Please help a chip amp guy Hello everybody, I was wondering if anybody has a schematic for a simple 2-3 watts solid state amp.Personaly I like chip amps but a few weeks ago a friend asked me to build him a low power guitar practice amp and pretty soon I discovered that low power chip amps ( like lm386 or tea2025 ) don't ,,like" guitar effects ( especialy distorsion ) - I think the protection circuts kick in -. And since my friend doesn't want to change his music style to something more mellow I hope someone can help. Paul

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Suitable woof & tweet for CV Full Range chip amp?	lunchmoney	Chip Amps	3	20th March 2011 06:00 PM
Chip Amp LM3886 stereo kit - built & ready to go	cdoggy81	Swap Meet	8	24th February 2009 08:26 PM
Who has tried a current boosted op-amp (with a transistor) as a chip-amp buffer?	sardonx	Chip Amps	18	19th March 2005 12:23 PM
Chip amp vs discrete amp temp compensation of bias.	Circlotron	Chip Amps	35	7th January 2004 12:07 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

31st January 2010, 10:41 AM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	if it's just a practice amp for headphones you can probably use a 5532 opamp to drive the headphones directly. Alternately you could use a pair of transistors as a current buffer on the end of the opamp to provide a bit more juice. Headphone Amplifier is an example of the circuit I mean. You could scale this down ab it and drive it from 2x9V batteries if you want it portable. Instead of BD139/140 you could use something like MPSA06/56.

31st January 2010, 11:05 AM	#3
raindog diyAudio Member Join Date: May 2003 Location: Timisoara	Thanks jaycee, I think Mr. Elliott's design will be perfect for the job. I'll start building as soon as I have all parts.