I have an Acoustic 370 head and the rotary pots on the front have gone bad. So I decided I'll replace them. Unfortunately, there is no model number on them and I doubt I can get ahold of the same ones anyway so I decided to check the schematic: http://acc.homeunix.net/images/schematics/370a1.jpg http://acc.homeunix.net/images/schematics/370b.jpg http://acc.homeunix.net/images/schematics/370c.jpg
According to the schematic, all of the pots are 50k. But when measuring with a multi meter, I get this:
Vol: 42 k
Treble: 20 k
Mid: 22 k
Bass: 25 k
So I'm wondering, which is right? 42 k is within normal tolerance of 50 k pots I suppose and the 20 and 22 ones is probably 20 k pots and the 25 k... well... 25 k maybe?
But why do my measurements differ from the schematic? Different revisions? Or are the pots on my amp just bad and need to be replaced?
So... should I go for schematic or measurement?
Another question, I assume the volume pot should logarithmic, but what about the tone pots? Lin or log?