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"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Probably a simple oversight.
I reckon that there is an error in the schematic diagram. The signal arrives at the centre lug of the tone pot. The upper frequencies are bled to ground via the capacitor. The remaining frequencies are bled to ground via the lug soldered to the pot chassis. (Exactly like any volume pot.)
1) Have the capacitor in circuit between the volume and tone pots.
2) Undo the permanent solder joint between terminal 3 and the chassis. Reconnect the "input" end of the capacitor to terminal 3.
Thanks all
The simplest way to correct it is to connect the cap between the volume pot end terminal and the tone pot middle terminal, in place of the black wire. If the cap isn't long enough, undo the solder joint between the end terminal of the tone pot and the casing, and connect the cap there instead.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
The diagrams were spruced up appearance-wise but there seemed to be no competent person willing or able proof read them. Thus, you could refer to four or five common circuit diagrams with no problems only to be foxed by the sixth because it has a howler in it.
The SD website Administrators were so pleased to be informed of this that they ran twenty red lights in my hono(u)r. Years later, the errors and omissions have still not been corrected.
In the case of the diagram used by the OP, somebody has included both of the commonest ways of connecting up a tone control.
On a positive note, the slavish following of official published diagrams by home guitar techs creates gainful employment for gents such as Steve Robinson.
Anything out of the ordinary and you need to break out pens, a napkin and a big bottle of correction fluid.
Twas ever thus. I originally registered on the Duncan forum to find out more about the old Active EQ series bass guitar pickups - the ones with little DIP switches on the casing. Turned out that I already knew more than the SD customer support employees whose jobs it was to answer customer queries.
Luckily, there were some seriously clever pickup geeks on that forum. Plenty of worthwhile wiring ideas and pickup modification suggestions.
It was never quite the same after Seymour relinquished control to his ex-wife and her new husband.
I'm afraid that the people in charge at SD Inc. seem to believe that they are infallible. They are more likely to snort it up rather than sort anything out.
If I added another volume.pot, could I wire one between the bridge and the switch, and one between the neck and the switch? Eg to give separate control of each?
I think I'd also ideally like the tone to only affect the neck (or at least not bridge only position). Could I position the tone between the neck and switch too? I'm guessing it might not work like that?!
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
And this one if you want it to work in the middle position regardless of where the volumes are set:
In both cases simply leave out the bridge tone pot and its cap.
In either scheme the tone control will work in the middle position when both volumes are up full.
"Take these three items, some WD-40, a vise grip, and a roll of duct tape. Any man worth his salt can fix almost any problem with this stuff alone." - Walt Kowalski
"Only two things are infinite - the universe, and human stupidity. And I'm not sure about the universe." - Albert Einstein
Pickup > individual volume > selector switch > master tone > output socket.