Re: APS-1: What cap value to use?
tone said:
So if I used a 500k volume pot, then a .047 would probably be a good choice?
Not really - the pot value and the tone capacitor value have separate effects.
Since a potentiometer is a variable resistor, it allows
all frequencies to bleed to ground equally (or not, as you raise the value of the resistor). For reasons I don't exactly understand, as you lower the value of the resistor you hear less of the high end of the frequency spectrum. In other words, as you roll the volume pot down from "10" to "1", the tone gets muddier.
A capacitor, on the other hand, acts as a filter that allows some frequencies to pass by and blocks lower frequencies. A .01 cap passes a narrow band at the top of the frequency range. A .047 cap passes a much wider band, reaching down into the upper-mids. As a tone cap, those frequencies that pass through the cap go to ground instead of into your signal.
So a 500k tone pot rolled down to the point where it's a 250k resistor, connected to a .047 cap, will dump more upper mids to ground than a 250k tone pot at "10" with a .022 cap. At "1", the 250k pot with a .022 cap will sound brighter than the 500k pot with the .047 cap.
I'm not saying that there's a wrong answer here! So much depends on your pickups, guitar, playing style, cables, effects, amp, speaker - basically everything between your fingers and your ears - and most importantly, what you want to hear.
This forum wouldn't be any fun if Seymour could just type out "
Thou shalt only use .022 caps with single coil pickups" and solve everyone's tone-quest
Hope this helps more than it confuses...
Chip