POTENTIOMETERS: BY THE VOLUME...

This MIC MORSEL will deal with potentiometers, volume controls, 'pots'... We're pretty much talking about the same thing when we use these words. Its a variable resistor, its function is to control the amount of signal that goes through it. In the case of LORD MICROPHONE its purpose is to regulate the volume produced by the mic at the source prior to being sent on for amplification -most typically by an amplifier dedicated to that purpose.
Take a mixed half dozen of these little guys and your bound to find that they're not all created equal. Besides what you see in terms of physical scale, you'll likely find markings indicating the impedance it's rated to operate at (important to know when matching it to its task, say as a volume control for a specific type of microphone element) and often in conjunction with these numbers you'll find either an 'A' or a 'B'. 'A' indicates a pot with an "audio curve"; The 'B' indicates a "linear curve". Huh? Take two 5MEG potentiometers, one an 'A' and the other a 'B'. Altho rated the same, they will perform VERY differently when used as a volume control for a compatible element -in this case any full-size crystal.
What will they do? How can you 'mod' their behavior? In the words of the Governator, "I'll be back..."