Stacked humbuckers

[RCW]

Re: Stacked humbuckers

No, each coil in a humbucker has one pole up and one down, from the coil's view. Magnetism always has both poles.

Sorry but I don't understand what you mean when you state "from the coil's view" A stack is nothing more than a full size HB with the coils placed one on top of the other.

Yes, a magnet always has a north and south pole. A bar magnet has a north and south edge with the center being dead (0 Gauss) and the rod magnets used in a stack are the same. The top (or end) is one polarity and the bottom is the opposite of it. The center is pretty much dead and that's usually where the bobbins meet.

I don't know how else I can explain it to you and I'm having a hard time understanding what part doesn't make sense to you.
Cheers.

 

[LtKojak]

Re: Stacked humbuckers

How does the Hot Stack design work using a blade pole piece..? Unles, there's the blade on top and a row of poles underneath it..?

Rob, you should try google patents and have a look of the several stacked humbucker designs, like the Kinman, the Di Marzio, while the patent holder of the Duncan STK design is Kevin Beller.

HTH,

 

[uOpt]

Re: Stacked humbuckers

Sorry but I don't understand what you mean when you state "from the coil's view" A stack is nothing more than a full size HB with the coils placed one on top of the other.

Yes, a magnet always has a north and south pole. A bar magnet has a north and south edge with the center being dead (0 Gauss) and the rod magnets used in a stack are the same. The top (or end) is one polarity and the bottom is the opposite of it. The center is pretty much dead and that's usually where the bobbins meet.

I don't know how else I can explain it to you and I'm having a hard time understanding what part doesn't make sense to you.
Cheers.

In a normal humbucker the field that matters to the electric induction is an upright oval around the coils, or around the passive polepieces, one has north up and one has south up.

For a humbucking effect to work you must have either opposing magnetic fields per coil or one coil must not have a field.

A design with a blade on top of rods makes perfect sense because then you can just make one of them non-magnetic and you are all set.

 

[uOpt]

Re: Stacked humbuckers

ETA: there is no such thing as "dead" or no field in the middle of a rod. If you were to simply put a coil around the lower half of a long rod magnet then the field that matters to induction is a field with north one side of the coil and south on the other side, one of them being being in the middle of the rod.

That's how magnetism works. There is never a "north only" or "south only".

 

[JHN]

Re: Stacked humbuckers

if you think of this then you may understand it.Can you make a one string humbucker with a U(horseshoe) shaped magnet and one identical coil on the edge of each pole top,?Answer is yes.Two coils,one magnet but it works.Now instead of that U magnet put a smaller magnet on the bottom and attach vertically at each magnetic pole a typical sh1 polepiece (it has no magnetic properties on it's own).One polepiece will show north along the whole length of it with a compass,the other south.Now wind a coil on each polepiece.Congratulations,you have a one string Humbucker.If you widen the bottom magnet to attach 6 polepieces per north and south one next to the other and surround each 6 per side polepieces with an identical coil you have a six string humbucker pickup

 

[uOpt]

Re: Stacked humbuckers

You realize I studied physics, right?

 

[JHN]

Re: Stacked humbuckers

Please then tell me what is wrong in the terminology of what I asked because in practice it works.

 

[uOpt]

Re: Stacked humbuckers

Please then tell me what is wrong in the terminology of what I asked because in practice it works.

You got a little condescending there in that earlier message.

Yes it works, but the coil fields are really all having north and south.

And the humbucking effect require opposite magnetic polarity for the two coils (unless you want out of phase sound), or the absence of a magnetic field in one coil.

 

[JHN]

Re: Stacked humbuckers

I think i understand what you say now,The point of argument here is most people in this forum,consider the coils NOT having magnetic properties such as north and south,but only hot and cold,ie start and end of coil,and direction of current.And after that they take in consideration the inductive properties as a result of them coiled around a north or south pole.Still not sure which approach of seeing it is correct,though.
Sometimes I wish we guitar players,would just take the mind trip most common people do. North Pole --> Peter North

 

[RCW]

Re: Stacked humbuckers

ETA: there is no such thing as "dead" or no field in the middle of a rod. If you were to simply put a coil around the lower half of a long rod magnet then the field that matters to induction is a field with north one side of the coil and south on the other side, one of them being being in the middle of the rod.

That's how magnetism works. There is never a "north only" or "south only".

Get your Gauss meter out and run the probe along the side of a charged rod magnet. When you get near the center it will read zero Gauss. Technically, the dead spot is where the polarity changes from N to S.

The stacked alnico rod pickup has one coil around the south end of the rods and the other coil around the north end of the rods.

I'm not sure why you're trying to dispute a design that obviously works as something that won't work.
I'm not being demeaning or rude. I just cant figure out what aspect of the design you're having such a hard time understanding.

 

[RCW]

Re: Stacked humbuckers

Can you make a one string humbucker with a U(horseshoe) shaped magnet and one identical coil on the edge of each pole top,?Answer is yes.Two coils,one magnet but it works.

Now simply take that horseshoe magnet and straighten it out. Turn it 90* and you have a stacked HB.

 

[JHN]

Re: Stacked humbuckers

Now simply take that horseshoe magnet and straighten it out. Turn it 90* and you have a stacked HB.

That's exactly the reason I described it that way.If Bottom coil is wired having opposite current direction to the top one,total resulting noise is cancelled,since bottom coil noise is out of phase with the noise produced from the top coil

 

[DeathMetalRob]

Re: Stacked humbuckers

Gentlemen, we're drifting from the point a little.

I wind two coils around an ultra thin blade. One is clockwise, the other anti clockwise. I have a magnet on the bottom of both coils, like a regular pickup. Do I get a stacked humbucking pickup..?

This piece is only a part of a bigger plan. If I try and wind this thing myself and get a decent result, I can send it to Seymour and have a proper model made.

It may even save money on the R&D side of things.

 

[uOpt]

Re: Stacked humbuckers

Get your Gauss meter out and run the probe along the side of a charged rod magnet. When you get near the center it will read zero Gauss. Technically, the dead spot is where the polarity changes from N to S.

The stacked alnico rod pickup has one coil around the south end of the rods and the other coil around the north end of the rods.

I'm not sure why you're trying to dispute a design that obviously works as something that won't work.
I'm not being demeaning or rude. I just cant figure out what aspect of the design you're having such a hard time understanding.

No, it really doesn't work that way. The magnetic field that a coil around the lower half of a rod magnet sees, and hence the field that is responsible for the induction of current for your signal, is not in the middle. That field, that coil, sees the middle of the magnet as north. There is no northless magnetic field.

Or think about breaking it in two, now you have two magnets with north and south ends each. Not one with north-to-neutral and one south-to-neutral.

 

[DeathMetalRob]

Re: Stacked humbuckers

Get your Gauss meter out and run the probe along the side of a charged rod magnet. When you get near the center it will read zero Gauss. Technically, the dead spot is where the polarity changes from N to S.

The stacked alnico rod pickup has one coil around the south end of the rods and the other coil around the north end of the rods.

I'm not sure why you're trying to dispute a design that obviously works as something that won't work.
I'm not being demeaning or rude. I just cant figure out what aspect of the design you're having such a hard time understanding.

The blade I have is not a magnet itself but, if I put a magnet on the bottom of two opposing coils, would I get a humbucking single..?

 

[RCW]

Re: Stacked humbuckers

No

 

[uOpt]

Re: Stacked humbuckers

The blade I have is not a magnet itself but, if I put a magnet on the bottom of two opposing coils, would I get a humbucking single..?

You mean two blades, one per coil, and a magnet on the bottom north one coil south one coil? That's how it is supposed to work.

 

[DeathMetalRob]

Re: Stacked humbuckers

You mean two blades, one per coil, and a magnet on the bottom north one coil south one coil? That's how it is supposed to work.

So, I'd cut the blade in half, I suppose and then put one on top of the other. I'm using a neodymium magnet for this and very thin gauge wire.

Theorize gentlemen, if you will, a stacked pickup made this way. Would the magnet go between the coils in this case..? The blade is 0.5mm thick, thence, I can fit more wire on for a higher (in theory) output and a monstrous magnet for the coils.

I know there are gaps in this, I'd like to have them filled.

 

[uOpt]

Re: Stacked humbuckers

So, I'd cut the blade in half, I suppose and then put one on top of the other. I'm using a neodymium magnet for this and very thin gauge wire.

Theorize gentlemen, if you will, a stacked pickup made this way. Would the magnet go between the coils in this case..? The blade is 0.5mm thick, thence, I can fit more wire on for a higher (in theory) output and a monstrous magnet for the coils.

I know there are gaps in this, I'd like to have them filled.

No, that way the two coils would have same magnetic polarity.

 

[DeathMetalRob]

Re: Stacked humbuckers

No, that way the two coils would have same magnetic polarity.

OK so, how about winding them in the same direction? Same deal or would turn things around?