Using a LM741 op-amp to amplify millivolt signals from a piezo hydrophone

[Adder_Noir]

Hi,

I'm currently making a hydrophone and I'm planning to use a piezo crystal as a sound receiver whose output I then intend to put through an op-amp. Berkeman recently raised an interesting point about voltage issues with op-amps so I thought I'd pose this question before proceeding any further.

I expect the signal to be of the order of millivolts and I want to turn it into something audible with headphones. Would a LM741 op-amp be okay for this or are it's limitations to severe? I'm guess I'd need a gain of about 1000 for it to work?

Can anyone help? Sorry to post yet another topic but why not take advantage of other people's expertise

 

[waht]

I'd recommend you use a TL082 for a microphone, probably is also avialable in radio shack. The chip is based of jfets which provide a very high input impedance, much higher than LM741. Also you get two opamp in this chip.

 

[Adder_Noir]

I'd recommend you use a TL082 for a microphone, probably is also avialable in radio shack. The chip is based of jfets which provide a very high input impedance, much higher than LM741. Also you get two opamp in this chip.

Thanks what

 

[cat27071987]

please shows me about LM741 or MA741.Thank You very much!

 

[edmondng]

please shows me about LM741 or MA741.Thank You very much!

http://www.google.com/search?hl=en&q=LM741+MA741&btnG=Google+Search

 

[zeitghost]

http://www.google.com/search?hl=en&q=LM741+MA741&btnG=Google+Search

 

[deakie]

hahaha...is this an example of a closed loop search?

 

[zeitghost]

Recursion: See Recursion.