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Post by vonFrenchie on Jul 18, 2006 0:18:04 GMT -5
I have a Jazz style bass (for those of you who dont know thats two single coil pickups two volume pots and one tone). Im planning on putting 2 on/on dpdt switches in it for phase inversion. Is it possible for me to put another dpdt on/on switch in it after the volume pots so I can switch between series and parellel? Im used to no pickup selection switch so that isnt necessary.
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Post by jhng on Jul 18, 2006 5:15:14 GMT -5
Have a look at ChrisK's series/parallel blender switch in the schematics board. You could do that using two separate volumes instead of a the blender pot.
Hastings
PS You only really need to phase invert one of the two pups. Two phase switches is overkill in my opinion. I'd rather use the left over one for something else (e.g. switching the tone control off).
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Post by vonFrenchie on Jul 18, 2006 11:12:35 GMT -5
I said two to avoid people telling me that I need two. Which kind of backfired. Thanks for the redirection though.
To bypass the tone pot could I just put a spdt switch with one end entering the tone and one going straight to the output and have the center connected to the second volume?
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Post by jhng on Jul 18, 2006 11:47:50 GMT -5
Cutting the tone pot out should be very straightforward. But I can't understand exactly what you are suggesting. All you need to do with the switch is use it to disconnect the tone control from the circuit.
You could have two phase switches if you want. But it is a bit redundant.
Hastings
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Post by vonFrenchie on Jul 18, 2006 17:05:08 GMT -5
Ok on a spdt switch there are 3 lugs. I'll call them the top, middle, and bottom. Now the top lug will go to the tone pot then out. The middle lug gets connected to everything before the tone pot (pickup selector volume pots and pickups in order). Then the bottom lug gets connected to the output. Would that work as a bypass?
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Post by jhng on Jul 19, 2006 4:06:53 GMT -5
Not quite.
The main signal doesn't actually pass through the tone control. The way it works is that the tone pot provides an alternative route that allows a variable amount of treble to take a shortcut to ground.
So wire it without the tone pot first. The attach a wire from the hot side of the jack to the middle lug of your SPDT. The attach the tone pot wire to one of the other lugs. That's it.
Have a look at the articles on GN1 about wiring up tone controls to get a bit of background.
Hastings
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Post by vonFrenchie on Jul 19, 2006 17:03:36 GMT -5
I dont care about tone bypass. I just want to know how I can wire 1 DPDT switch to change between series and parellel. I couldnt make sense out of chrisk's teleblender. There was no series/parellel blender so Im still lost. EDIT Could this be applied to my situation>  |
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Post by jhng on Jul 20, 2006 4:24:36 GMT -5
Yes, but the volumes will play up. ChrisK's series/parallel blender is one of the diagrams in the "module" thread started by Unk on the schematics subboard. Sorry, I hadn't realised it was so well hidden.
Hastings
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Post by vonFrenchie on Jul 20, 2006 13:05:35 GMT -5
Well couldn't a volume be placed at the hot coming from the bridge and the hot coming out of the switch before the two join.
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