Quietest Humbucker:

ivan H said:
Hi Smitty, I'll have to search for them too ...
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Don't knock yourself out. It makes perfect sense because it does satisfy Faraday's Law - a magnetic field in a state of change over time (the vibrating magetized string) will induce a current in a conductor exposed to that magnetic field (the coil). I was more curious about the particulars of the experiment, as in how strong of a magnetic field was induced into the string for the experiment. Enjoy your weekend and don't bother hunting for obscure articles on the interwebs!

However, in a regular guitar pickup, I'm not convinced that ONLY the magnetized portion of string above the coil is responsible for the current flow in the coil.

(BTW, I'm not trying to put words in your mouth...please, correct me if I characterize your statements inaccurately).

Anyway, the reason I say this is that when two magnetic bodies approach each other, as their respective magnetic fields impinge, the magnetic lines of flux of both magnets (or magnetized bodies) will be distorted accordingly. (I read a research paper from Harvard that discussed this, but, like you...I can't find it!). So, it seems inevitable that as the magnetized portion of string vibrates within the magnetic field of the permanent magnet/pieces, that the magnetic flux of the permanent magnet/pole pieces must be distorted, as well. Hence, the current induced within the coil will be a product of both mechanisms - the magnetized string itself, and the resultant flux distortion of the pickup's magnet/pole pieces.

My head hurts, now!

At the end of the day, I guess all this is really just forum-cud to chew on. We're still gonna choose our pickups based on how they sound in our guitars, regardless of how that sound gets produced.

It's time for another cup of coffee!!!

Oh, and the music store emailed me...my new picks are in.

Yay!
 
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I don't see these two solutions as separable. The string becomes a part of the pickups's magnetic circuit and in doing so it becomes magnetised - if it didn't it could not produce an output. Moving the string around changes the reluctance of the circuit and that, combined with the permanent magnetism produces the varying flux that induces the EMF (output voltage).

For anyone interested the equation is a simple one EMF = -N * delta phi / delta t

N is the number of turns, and delta phi / delta t is the rate of change of flux.
 
DonP said:
I don't see these two solutions as separable. The string becomes a part of the pickups's magnetic circuit and in doing so it becomes magnetised - if it didn't it could not produce an output. Moving the string around changes the reluctance of the circuit and that, combined with the permanent magnetism produces the varying flux that induces the EMF (output voltage).
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That's what I was trying to say, but you said it more elegantly!
 
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Yeah, I know you were. But back to the magnetised string (and non-magnetised pickup). The string is so thin you can only make a really weak magnet from it, so it will give almost no output. Much better to get a big chunk of alnico or rare earth for some real power.
 
OMG Ivan, that is a lot of reading. I got half way thru and needed a nap. That's what happens when you are working on your 2nd week of a flu.
 
Thinking about it, of course you are right, it cant be anything but a product of both, or as Don says, the two are not separate. Chilli, hope you get well soon. Flu's can be debilitating. How's the amp coming along. Cheers
 
Amp on hold till I feel better and can concentrate so as to not ruin anything or get electrocuted while doing the bias work.
I will be conferring with you and Don when the time comes on the step by step to get her biased right the first time.
 
ivan H said:
Thinking about it, of course you are right, it cant be anything but a product of both, or as Don says, the two are not separate. Chilli, hope you get well soon. Flu's can be debilitating. How's the amp coming along. Cheers
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And that what makes this so great...guys from different countries, continents, and hemispheres kickin' around ideas and not getting into a tiff with each other over it.

Enjoy the rest of the weekend!
 
I admit to not understanding most of what has been written here, but I do know something about pickups and theirvmagnetic fields - I hate the magnetic pull on the neck pickup of a Stratocasterr-esque guitar.

With high gain, the warble is so pronounced its unreal.

One of the biggest factors in this anomaly is the cursed "vintage stagger" poles, originally designed for a wound 'G' string.

So, I was really excited to read about DiMarzio's new "Injector" line, which was designed especially to permit super-close string to pole settings without warble (Wolftones) and ohm for ohm they are said to have 40% less magnetic pull.
 
eSGEe said:
What you need is strategically placed Duct Tape ;)
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Look at the bridge...that's a Danelectro U2 Chambered Body with a what appears to be a Telecaster neck...

That bridge uses a sliding Rosewood wedge for intonation.

See our Sears Silvertone 1450 (Danelectro U1 variant) below for a closer look...

downloadfile-6.jpeg
 
Have you tried pushing the pole pieces through yet Robert? I have a set of custom shop Texas Specials sitting idle (got cheap because a friend reckoned he couldn't get a decent tone from) & just tried it on the neck pickup, it really pushed through very easily. I only pushed it in a tad. These have the fiberboard base though, it may not be so easily done on a pickup with a synthetic former. I'll have to try on my strat's pickups. Cheers
 
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