Re: rewire my jazz bass

"Steve" <smcyr@xxxxxxxxxxxxxxxxxx> wrote in message
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RichL wrote:
"Steve" <smcyr@xxxxxxxxxxxxxxxxxx> wrote in message
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Stevie;

You were misinformed. See my comments below.

--Steve

Stevie wrote:
"Axtman" <daxt@xxxxxxxxxxxxxxxxxxxx> wrote in message
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I love jazz basses except for the volume/volume/tone control. I want
to
rewire it to volume/pan/tone. Anybody know where I can find a wiring
diagram? Also I would like wire them so that the tone is not sucked
out of
them when you turn down the volume.

Thanks!
DA
I was looking into that and I read that the pan pot prevents you from
being
able to have both pickups played at once at full volume - the only
time
any
pickup is at full volume is when the blend pot is turned all the way
left or
right. This made sense to me since the pan pot is actually two
stacked
variable resistors which are mechanically opposite of each other. As
one
pickup is turned up, the other is turned down and although the knob
when
set
in the middle has both pickups at equal volume with each other, they
are
not
at full hilt.

Not correct, unless it's an improperly-designed blend pot. The blend
pot is designed so that both pickups are at full volume at the center
position.

Steve, based on the diagram you posted, what's going on is that the
total
output from P1 and P2 remains constant as you turn the pan pot.
Consider X
to be the percentage of the output from P1 that's getting to the volume
control. If V1 and V2 are the voltages output from P1 and P2, then the
voltage at the volume control is

X*V1 + (1-X)*V2 ,

so that if the outputs of the two pickups are the same, the total at the
volume control is independent of X. It's exactly like a pan pot on a
mixer,
where the correspondence is P1 --> left, P2 --> right.

The pan pot, or "balance blend pot" as it's called in the diagram, is
two
ganged, carefully matched linear taper pots.

To the OP: If you don't want your signal to turn to mush, drop a small
capacitor in between the "hot" and "wiper" lugs on the volume control.
In
the diagram that Steve posted, this would be the left and middle lugs of
the
control. Values between .001 and .0005 (microfarads) should do the
trick.



So you're saying that I was misinformed, not Stevie. Sorry about that.
Come to think of it, the only volume/blend setups I've seen have been
with preamps, so that makes sense.

In a sense, you're correct. Because the relative contributions from the two
pickups are adding in *series*, you will perceive the volume as staying
roughly the same as you pan the pot from one extreme to the other. As I
said, if you consider the analogy with the pan pot on a mixer, the volume
you perceive stays the same as you pan from right to left. It's not weaker
when it's in the middle.


.

Relevant Pages

  • Re: rewire my jazz bass
    ... I was looking into that and I read that the pan pot prevents you from ... volume control is independent of X. ... The pan pot, or "balance blend pot" as it's called in the diagram, is two ... So you're saying that I was misinformed, not Stevie. ...
    (alt.guitar.bass)
  • Re: rewire my jazz bass
    ... I was looking into that and I read that the pan pot prevents you from ... unless it's an improperly-designed blend pot. ... Steve, based on the diagram you posted, what's going on is that the total ... volume control is independent of X. ...
    (alt.guitar.bass)