Hello,
I'm interested in building a preamp for a piezo contact mic like http://www.richardmudhar.com/blog/piezo-contact-microphone-hi-z-amplifier-low-noise-version/#comment-4719.
I already tried buillding something like this with a mpf102, and it worked (a bit), but it only worked on a guitar amplifier, has no overvoltage safety, and I had the fear of breaking my equipment when plugging it in. Now I want to go with the circuit described in the link. But I don't know if it will actually work with my piezo and my power-amp/recording tool (sorry, I'm a noob in calculating electronical compatibilitys). For example, I use a piezo of type 717770, which has a impedance of 800 ohms, but I thought that piezos usually have a very high output impedancy? Also, I don't know if the circuit is compatible with 'normal' line-ins, for example my ax-390 amplifier or a common notebook mic input (in my case, a t400). Can you maybe help figuring out if I can use this circuit with my equipment? It would be cool to be able to plug it into the most common inputs. Thanks!
Please, I really need an answer. It would already be cool if you can point me to some technics to calculate if the circuit is compatible (regarding the impedance, voltage and current levels).
Do I have to edit my question or why are there no replys?
I'm interested in building a preamp for a piezo contact mic like http://www.richardmudhar.com/blog/piezo-contact-microphone-hi-z-amplifier-low-noise-version/#comment-4719.
I already tried buillding something like this with a mpf102, and it worked (a bit), but it only worked on a guitar amplifier, has no overvoltage safety, and I had the fear of breaking my equipment when plugging it in. Now I want to go with the circuit described in the link. But I don't know if it will actually work with my piezo and my power-amp/recording tool (sorry, I'm a noob in calculating electronical compatibilitys). For example, I use a piezo of type 717770, which has a impedance of 800 ohms, but I thought that piezos usually have a very high output impedancy? Also, I don't know if the circuit is compatible with 'normal' line-ins, for example my ax-390 amplifier or a common notebook mic input (in my case, a t400). Can you maybe help figuring out if I can use this circuit with my equipment? It would be cool to be able to plug it into the most common inputs. Thanks!
Please, I really need an answer. It would already be cool if you can point me to some technics to calculate if the circuit is compatible (regarding the impedance, voltage and current levels).
Do I have to edit my question or why are there no replys?
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