I'm one of the many lurking learners here, and as part of my self-education I've been I've been going through the circuits of all the mics I actually own to see what I can learn.
I have a set of Nakamichi CM-300 small diaphragm battery powered electret SDCs, which have a very simple circuit that you can see about two thirds of the way down this page:
https://audiomods.datsunzgarage.us/cm300/
It's obvious from the diagram (and also just looking at the microphone) that the battery is in the signal path, and my question is this: is battery chemistry likely to influence the sound?
These mics originally came with a 9V mercury cell, which is now (rightly) unobtanium (and also a hazmat issue). I'm using them with a stack of 3V "dog collar" batteries, which I think are Lithium based, but there is also an alkaline cell available online for around $20.
Does anyone here know if battery chemistry a factor at all?
(I guess I could just pony up for the alkaline cell and do the experiment for myself, but I'm hesitant to spend on these mics, as I don't use them often.)
M
I have a set of Nakamichi CM-300 small diaphragm battery powered electret SDCs, which have a very simple circuit that you can see about two thirds of the way down this page:
https://audiomods.datsunzgarage.us/cm300/
It's obvious from the diagram (and also just looking at the microphone) that the battery is in the signal path, and my question is this: is battery chemistry likely to influence the sound?
These mics originally came with a 9V mercury cell, which is now (rightly) unobtanium (and also a hazmat issue). I'm using them with a stack of 3V "dog collar" batteries, which I think are Lithium based, but there is also an alkaline cell available online for around $20.
Does anyone here know if battery chemistry a factor at all?
(I guess I could just pony up for the alkaline cell and do the experiment for myself, but I'm hesitant to spend on these mics, as I don't use them often.)
M
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