Op-Amp Gain

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

Thanks waht

cat27071987

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

edmondng

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

zeitghost

deakie

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

zeitghost

Recursion: See Recursion.