Is this just mojo? Or do carbon batteries actually have different electrical properties that alter their "sound" - and if so, what's responsible for it? The first thing that comes to mind is voltage output, but I've also heard mention of resistance and capacitance and whatnot. And could these traits be modelled in an effect's power circuitry?
Help much appreciated.
Carbon vs alkaline 9V batteries?
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lolbou
- Old Solderhand
The voltage output of a battery is related to the amount of current the circuit draws. The bigger the current, the lower the voltage, because of internal resistance.
Considering the (poor) curves below from Energizer:
1. Alkaline have better capacity (in Ah).
2. Alkaline have a slightly lower internal resistance (the drop after 100mA is slower), due to the electrolyte used (hydroxyde is one of the best ions when it comes to carry electrical charges, whereas ammonium/chloride are average ones) and due to the graphite used in the carbon battery.
3. if your pedal draws up to 100 mA, forget about batteries...
I've never heard of any capacitance until now
, though you can find some impedance values for batteries. If any, I guess that this parasitic capacitance is coming from the construction of the battery itself. Since both are roughly similarly constructed (same dimensions and spacings between electrodes), you can expect to get close capacitances.
For reference, the impedance @1kHz for a Duracell AA 1.5V battery is around 10 mohms.
Further research on this "unknown" (at least to me
) capacitance led me to this page, where you can find that the a battery can be modelled as this:
Considering the (poor) curves below from Energizer:
- Battery.jpg (40.55 KiB) Viewed 743 times
2. Alkaline have a slightly lower internal resistance (the drop after 100mA is slower), due to the electrolyte used (hydroxyde is one of the best ions when it comes to carry electrical charges, whereas ammonium/chloride are average ones) and due to the graphite used in the carbon battery.
3. if your pedal draws up to 100 mA, forget about batteries...
I've never heard of any capacitance until now
, though you can find some impedance values for batteries. If any, I guess that this parasitic capacitance is coming from the construction of the battery itself. Since both are roughly similarly constructed (same dimensions and spacings between electrodes), you can expect to get close capacitances.For reference, the impedance @1kHz for a Duracell AA 1.5V battery is around 10 mohms.
Further research on this "unknown" (at least to me
) capacitance led me to this page, where you can find that the a battery can be modelled as this: - image017.jpg (2.91 KiB) Viewed 743 times
I'm afraid it is anyway...the_floyd wrote:Is this just mojo?
- Are you a mod or a rocker?
- Uh, no, I'm a mocker.
- Uh, no, I'm a mocker.
. Much more cerebral, I like it!