Hi 🙂
For my melodeon (small diatonic accordeon) I was looking for an amplification method / microphone, but the systems that existed back then such as this one: http://www.mrmicrophone.com/microvoxsite/accpage.htm are all discontinued. The only one I could find is this one: https://www.harmonik.com.br/ac3001hq?pgid=k5xwxvpm-fa9302e4-0e0b-4d92-9633-2c7ddcedd241&lang=en but it is made to be built in, and I need a setup such as the microvox, where it is velcro'ed to the melodion grille.
Since this is an array of 3 electret microphones, I figured it should not be very hard to make one myself. Electret mics are not that expensive, and I am proficient in soldering.
I just have no electrical knowledge at all.
Could anyone tell me what I would need to make this work, apart from 3 electret mics, some wires and a jack plug?
How to get started with this?
Thanks,
Vincent
For my melodeon (small diatonic accordeon) I was looking for an amplification method / microphone, but the systems that existed back then such as this one: http://www.mrmicrophone.com/microvoxsite/accpage.htm are all discontinued. The only one I could find is this one: https://www.harmonik.com.br/ac3001hq?pgid=k5xwxvpm-fa9302e4-0e0b-4d92-9633-2c7ddcedd241&lang=en but it is made to be built in, and I need a setup such as the microvox, where it is velcro'ed to the melodion grille.
Since this is an array of 3 electret microphones, I figured it should not be very hard to make one myself. Electret mics are not that expensive, and I am proficient in soldering.
I just have no electrical knowledge at all.
Could anyone tell me what I would need to make this work, apart from 3 electret mics, some wires and a jack plug?
How to get started with this?
Thanks,
Vincent
I´ve made may microphone systems for weird instruments (Google Les Luthiers from Argentina), including Accordion, Sax, Violin,etc.
Yes, 3 evenly spaced electrets will do .
In principle, they are "constant current" output since capsule drives a FET and output is its modulated Drain current, normally dropped through a resistor where the output signal develops, so in principle and for the absolute simplest setup, you can use all 3 capsules in parallel, feeding a common resistor connected to +9V
For starters, use 3k3 and check DC voltage drop across it, you want some 4.5V (half of the 9V supply) or nearby.
Try it and post results.
personally I fed each capsule independently, and mixed/amplified them with Op Amps, similar to the more complete example you show by Harmonik, but my "crude"/DIY version is closer to the simple cheap Microx one.
They use a plain 1.5V AA battery, too low in my experience, very easy to overload, that´s why I suggest 9V , way more realistic.
Yes, 3 evenly spaced electrets will do .
In principle, they are "constant current" output since capsule drives a FET and output is its modulated Drain current, normally dropped through a resistor where the output signal develops, so in principle and for the absolute simplest setup, you can use all 3 capsules in parallel, feeding a common resistor connected to +9V
For starters, use 3k3 and check DC voltage drop across it, you want some 4.5V (half of the 9V supply) or nearby.
Try it and post results.
personally I fed each capsule independently, and mixed/amplified them with Op Amps, similar to the more complete example you show by Harmonik, but my "crude"/DIY version is closer to the simple cheap Microx one.
They use a plain 1.5V AA battery, too low in my experience, very easy to overload, that´s why I suggest 9V , way more realistic.