View Full Version : question about bass pots...
10-26-2005, 01:49 PM
I've had a Mex P-bass for years, and recently bought another one that appears to be made about the same time(approx. 15yrs ago)... "My" bass came equipped with 500k pots - and when I asked about replacements, a local music shop owner trotted out a Fender book that clearly showed 250k pots were the norm(although I bought "mine" brand new, and no one has ever worked on it)... The "new" bass(no marked value on the pots) doesn't seem to put out the same level signal as the "old" one - would changing out the pots to 500k ones help that at all, or is it probably a difference in pick-ups??? I notice there's a capacitor in there - could changing that make a difference - and if it would, how so???
Thanks in advance,
10-26-2005, 01:58 PM
The capacitor does really make a difference. For bass frequencies there isn't much difference between 500 and 250 K pots. With guitar frequencies, it is another story.
If you'v echanged the pickups, then that will really make a difference. A nice thing for everyone to try is to buy a few capacitors and then solder them into your bass, choose the one you like the most and keep that one.
The 0.1uf cap will roll off more treble with your tone pot,
resulting in a significant high cut. The 0.022uf cap will roll off less treble,
giving you a brighter sound with the tone pot in it's maximum cut position.
ps. if you haven't changed your pickups, make sure everything else is the same on your bass! Pickup height, amp settings etc etc.
10-27-2005, 07:45 AM
Thanks for the reply, kilian - after looking at the capacitors, "my" Mex P-bass has one that says "683J" - so I'm assuming that's a .068uf - and the "new" one says ".05M", "100V",and "Z5V" - so I'm not sure what value that one is... I did notice that the magnets on "mine" are significantly stronger than on the "new" one - so, I'm sure that's part of the difference... According to serial#s, the "new" one is actually about 8,000 units older than "mine" - so maybe those pick-ups are just old and tired - with any luck, I can scrounge up another set without spending too much $$$ on the project....
12-24-2008, 02:34 PM
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