Need pre-amp with LM358

mindmad · 17th September 2010, 07:24 PM

hi all

i want pre-amp with tone control with LM358 IC

Can you help me find them

thank's

mjf · 17th September 2010, 09:12 PM

hello.
the lm358 is a conventional ic,not really an audio ic................
you can try to use a typ. audio schematic where you swap the ic's to the lm358.
example:tone control
greetings

wrenchone · 17th September 2010, 11:51 PM

The LM358 is a horrible excuse for an opamp. It has a class B output stage and slow speed, so it has big problems with crossover distortion. Even the much-reviled 4558 would be a better choice than the LM358.

mindmad · 18th September 2010, 12:33 AM

thanks for replay

can you help me to find stereo tone control circuit

mindmad · 19th September 2010, 03:56 PM

i found the ic TL072

but i cant found the schemes for stereo and treble & bass control

can any one help me

thanks

Mooly · 04:50 PM

mjf showed you one in post #2

Almost any opamp data sheet has a tone control shown as an application... and any opamp will work.

Here's another, perfect for a TL072

Edit... actually the one in post #2 has an error... the opamp inputs are shown incorrectly (reversed).

stratus46 · 19th September 2010, 07:01 PM

Quote:

Originally Posted by wrenchone

The LM358 is a horrible excuse for an opamp. It has a class B output stage and slow speed, so it has big problems with crossover distortion. Even the much-reviled 4558 would be a better choice than the LM358.

I looked the LM358 up after your comment and I think you were being a bit generous. I think a tin can and string could come close to beating it.

G²

mindmad · 20th September 2010, 12:50 AM

Thank you mooly

but you are send the schemes with LM4562

please can you send it complete like this

but with TL072

stratus46 · 20th September 2010, 01:01 AM

Quote:

Originally Posted by mindmad

Thank you mooly

but you are send the schemes with LM4562

please can you send it complete like this

but with TL072

If you build that remember to add the output DC blocking capacitor as the DC on the output should be around 15 volts or you could go to balanced power supplies and remove most of the bias components namely R1, R2, R3, C1, C2 and C5.

G²

Mooly · 20th September 2010, 06:04 AM

The circuits are complete... the opamp type makes no difference

You will have to transfer it to a PCB or stripboard and add power suppliers etc... it's all conventional stuff.

Page 7 here from the TL082 data sheet,
http://www.datasheetcatalog.org/data...r/DS008357.PDF

a 3 way tone control.

17th September 2010, 07:24 PM	#1
mindmad diyAudio Member Join Date: Apr 2009	Need pre-amp with LM358 hi all i want pre-amp with tone control with LM358 IC Can you help me find them thank's

20th September 2010, 06:04 AM	#10
Mooly diyAudio Moderator Join Date: Sep 2007	The circuits are complete... the opamp type makes no difference You will have to transfer it to a PCB or stripboard and add power suppliers etc... it's all conventional stuff. Page 7 here from the TL082 data sheet, http://www.datasheetcatalog.org/data...r/DS008357.PDF a 3 way tone control. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

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
MC pre pre amp for shelter 501 MK11	cjcc67	Analogue Source	19	24th May 2010 07:17 PM
Blown amp pre-amp in or HU pre-amp out?	scraph	Car Audio	5	23rd January 2009 12:58 AM
lm1458 and lm358 upgrades	crippledchicken	Parts	3	28th May 2004 04:30 AM
About lm358	rulezzz	Parts	2	8th January 2004 06:06 AM

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

17th September 2010, 11:51 PM	#3
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	The LM358 is a horrible excuse for an opamp. It has a class B output stage and slow speed, so it has big problems with crossover distortion. Even the much-reviled 4558 would be a better choice than the LM358.

18th September 2010, 12:33 AM	#4
mindmad diyAudio Member Join Date: Apr 2009	thanks for replay can you help me to find stereo tone control circuit

19th September 2010, 03:56 PM	#5
mindmad diyAudio Member Join Date: Apr 2009	i found the ic TL072 but i cant found the schemes for stereo and treble & bass control can any one help me thanks

20th September 2010, 12:50 AM	#8
mindmad diyAudio Member Join Date: Apr 2009	Thank you mooly but you are send the schemes with LM4562 please can you send it complete like this but with TL072