Going to Design (Preamplifier PCB).

Ayne · 14th April 2007, 04:57 AM

After searching enough, i found this
Preamplifier Circuit Page

Then i make them in simulator..

1st CIRCUIT PREAMPLIFIER
2nd CIRCUIT MICPREAMPLIFIER

In simulation their result is enough satisfactory..
But i use TL072 and i have listen that TL07X series is not good enough now a days.
What u suggest, Best OPAMP, Infact i want to connect this Preamplifier with Computer output..

OPAMP Should be dual(two OPAMP in single chip)..
I am asking best OPAMP here because, many expert members are here and i think they have dealed with enough OPAMPs. I want to take advantage from their experience...

I also request to expert members that put ur views about this Preamplifier over here..

After ur Responce i will make PCB of above both circuits..

Thanks.

vynuhl.addict · 14th April 2007, 09:23 AM

It depends what you are looking for,k best sonics or something that serves its function. The BB opa2134 is a good dual chip, op275, or opa2604. My personal fave which is unsurpassed by any single op amp is the Jung Composite Op Amp or the diamond buffer with a fet input op amp. With some careful choices you can put yourself in a position to be able to eliminate output coupling caps and caps between preamp stages.

Colin

darkfenriz · 14th April 2007, 10:01 AM

I do not like the mic section, you will have to use huge electrolytic capacitors and PSRR will be poor.

Ayne · 16th April 2007, 01:41 PM

Q no 1:- why we listen a sound when we put mic infront of speaker????

Can we minimize that sound.

Q no 2:- What is PSRR???

Please explain above both questions in detial.

Thanks.

sixtek · 16th April 2007, 01:55 PM

1., the system is "festering"
2., PSSR = power supply rejection ratio

Ayne · 16th April 2007, 02:19 PM

Thanks sixtek.

But i googling with "festering" and found nothing related to Sound and Mic..

Plz can u explain in more detial???

14th April 2007, 04:57 AM	#1
Ayne diyAudio Member Join Date: Apr 2007	Going to Design (Preamplifier PCB). After searching enough, i found this Preamplifier Circuit Page Then i make them in simulator.. 1st CIRCUIT PREAMPLIFIER 2nd CIRCUIT MICPREAMPLIFIER In simulation their result is enough satisfactory.. But i use TL072 and i have listen that TL07X series is not good enough now a days. What u suggest, Best OPAMP, Infact i want to connect this Preamplifier with Computer output.. OPAMP Should be dual(two OPAMP in single chip).. I am asking best OPAMP here because, many expert members are here and i think they have dealed with enough OPAMPs. I want to take advantage from their experience... I also request to expert members that put ur views about this Preamplifier over here.. After ur Responce i will make PCB of above both circuits.. Thanks.

16th April 2007, 01:41 PM	#4
Ayne diyAudio Member Join Date: Apr 2007	Some Questions Q no 1:- why we listen a sound when we put mic infront of speaker???? Can we minimize that sound. Q no 2:- What is PSRR??? Please explain above both questions in detial. Thanks.

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14th April 2007, 09:23 AM	#2
vynuhl.addict diyAudio Member Join Date: Mar 2006 Location: Vancouver, BC,Canada	It depends what you are looking for,k best sonics or something that serves its function. The BB opa2134 is a good dual chip, op275, or opa2604. My personal fave which is unsurpassed by any single op amp is the Jung Composite Op Amp or the diamond buffer with a fet input op amp. With some careful choices you can put yourself in a position to be able to eliminate output coupling caps and caps between preamp stages. Colin

14th April 2007, 10:01 AM	#3
darkfenriz diyAudio Member Join Date: Jun 2004 Location: Warsaw	I do not like the mic section, you will have to use huge electrolytic capacitors and PSRR will be poor.

16th April 2007, 01:55 PM	#5
sixtek diyAudio Member Join Date: Jan 2007	1., the system is "festering" 2., PSSR = power supply rejection ratio

16th April 2007, 02:19 PM	#6
Ayne diyAudio Member Join Date: Apr 2007	Thanks sixtek. But i googling with "festering" and found nothing related to Sound and Mic.. Plz can u explain in more detial???

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