I fitted a single coil pick up to my gone fishing cbg with a volume control but alas nothing would work!
I wired every thing up as per instructions.
mmm me thought I'll try the peizo wired that to the volume but no worky?
so I wired the peizo directly to the jack its working! so I re soldered the single pick up no worky again
swapping wires around made no difference.so out came the single pick up .
I then put the earth wire to the amp jack plug ..tip.. and the red wire to the lower pin it worked.
I tap the pick up and it made a tapping noise through the amp .so that proved that the pick up is working ok ,but why it wouldn't it work wired directly to the jack ,the peizo did so the jack is wired ok.
here's some pictures..
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I manage to get it sorted it was the earth problem like you guys said.
the picture john gave me doesn't show the earth wire to that little lug on the turning knob .!!
had time today to fanny on with my cbgs etc .
my neighbor popped in and notice my cbg gone fishing.
he was quite impress and also like the sound and you know what! so did I.
as for the knob! I don't think it is necessary for home use,stage maybe yeah.
Glad it worked out!
Dont you also need a tiny capacitor for your ground leg, as this determines what part of the signal goes to ground.?
Ahah... If you use a tone pot
I have something like this to work on...!
yikes!
it splits pickups right and left via stereo,
Good luck hope you get yours working.
Whats the pot value if its too high it may be a problem?
Grounds is normally to the outside of the jack socket and would be one issue..
You can also get phase cancelling with 2 pickups but this is mainly the fun of using 2 wound pickups, hence why a strat middle pickup is different and wired differently.. and why a humbucker has north and south poles.
John, I didn't see in here if you changed the volume POT wiring.
The pickup wires go to the left and right lugs of the volume POT.
The TIP connector on the jack goes to the center lug and the SLEEVE connector on the jack goes to either the left or right lug. It doesn't really matter which, one will give you a clockwise volume knob and the other will give you a counterclockwise volume knob.
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It is common (but not essential) to 'ground' the metal case of the POT to the SLEEVE connector of the jack so you don't get humm every time you touch the volume knob. That's why the drawn picture shows the volume POT's right lug bent backwards to touch the POT's case and the solder connecting one pick up lead, the bent lug, and the SLEEVE connector from the jack.
With coil pickups it is also common to 'ground' the strings to that same SLEEVE ground point to reduce humm. A metal string moving in the magnetic field of the coil pickup generates its own AC charge and long metal strings can act as antenna for things like fluorescent lights.
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(And now my apologies for the electronics 101 that follows to any of y'all that already know this)
The outside lugs of a POT are the opposite ends of a huge resistor, 250,000 or 500,000 ohms is common. The pickup generates 0.05 to 0.20 Volts. With the pickup connected to the opposite ends of the resister, the POT acts as a uniform voltage divider. The knob moves a sweep connector along the resister and the center lug is your connection to that sweep. With the knob turned 80% of the way, the center lug picks up 80% of the 0.05 to 0.20 Volts. With it turned 30% of the way the center lug picks up 30% of the 0.05 to 0.20 volts.
If the pickup is not connected to both ends of the POT's resister, then it acts as a variable load, and it is trying to push that little 0.05 to 0.20 volts of power through 50,000 to to 220,000 ohms of resistance, and you will only get 0.00001% of the 0.05 to 0.20 volts coming out of the center lug.
Ie the resistance will vary...
This is how multiple volume controls eg Gibsons etc are usually done, and a lot more than .0001% or whatever gets thru...
I do 'blend' controls like this all the time..
Way finder to your other, have you heard of the impedance mismatch between piezos and regular guitar amps? This is what causes the 'quack', almost a square wave... Well adding another piezo in series will DOUBLE this discrepancy....
Look pickups.. It's a very subjective thing.. Guys string up their first few cigar box guitars... And it sounds GREAT,. To them. Dude I remember the rush myself. It doesn't mean it is great. (Nor necessarily that it is not)...
We talk about piezos and one guy hates em.. Another says hey I've used em dozens of times and they work GREAT! Hmm what does that even mean? Does this guy have a 100w Marshall or an iRig ???
Now the truth is no one uses disc piezos in a production instrument. Not even in the $75 first act jobs at K Mart. Use em if you must but that's the truth of it. So putting two of em in series?? Well take everything I hate about em... And double it lol. :)
Make sure there is some pressure on them
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