timtam
Meter Reader 1st Class
Posts: 59
Likes: 29
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Post by timtam on Jun 25, 2024 8:56:40 GMT -5
Adding to our information on pickup design/testing processes at pickup manufacturers, this was the equipment on one of the pickup designer's workbenches at Lollar in the recent youtube video below. Not particularly exciting, nor very surprising. And not as sophisticated as the previous threads on PRS and Seymour Duncan ... both of which use resonant frequency/Q factor/bode plots.
I think Jason Lollar has spoken before about their emphasis on inductance. Which begs the question why they don't include it in their published pickup specs. What's the point of explaining here what inductance is unless you list it ? Particularly since the one measurement they do list - DCR - then comes with their long list of caveats as to why it can be misleading ...
Equipment:
Digital multimeter - Fluke 117
Analog multimeter - Tekpower TP7050
LCR meter - BK Precision Model 880
Gaussmeter - AlphaLab GM1-ST
Screenshot:
From video:
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Post by stratotarts on Jun 25, 2024 10:22:51 GMT -5
The explanation of inductance that is on that page displays a weak understanding of what inductance is, or to be extremely generous, is incomplete. It does not mention the reactance produced by back EMF in the coil. In fact, it does not mention the effect of inductance on tone, only on output. So it's not very surprising if they don't list it in their product specs.
Lollar has a long standing brand presence - most of his customers are more interested that they are from Lollar, than about any technical details. So he may consider those secondary to the business. That's pretty much the norm with custom builders.
Often, technical language is employed more to create an image of knowledge and competency than for practical reasons. Knowing that most of the audience is not qualified to fully understand or fact check what you say.
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Post by kitwn on Jun 25, 2024 22:41:05 GMT -5
The explanation of inductance that is on that page displays a weak understanding of what inductance is, or to be extremely generous, is incomplete. It does not mention the reactance produced by back EMF in the coil. In fact, it does not mention the effect of inductance on tone, only on output. So it's not very surprising if they don't list it in their product specs.
Lollar has a long standing brand presence - most of his customers are more interested that they are from Lollar, than about any technical details. So he may consider those secondary to the business. That's pretty much the norm with custom builders.
Often, technical language is employed more to create an image of knowledge and competency than for practical reasons. Knowing that most of the audience is not qualified to fully understand or fact check what you say.
As one of my technical lecturing colleagues used to say: If you can't blind them with science, baffle them with bullcrap.
Kit
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Post by ms on Jun 26, 2024 6:27:58 GMT -5
The explanation of inductance that is on that page displays a weak understanding of what inductance is, or to be extremely generous, is incomplete. It does not mention the reactance produced by back EMF in the coil. In fact, it does not mention the effect of inductance on tone, only on output. So it's not very surprising if they don't list it in their product specs.
Lollar has a long standing brand presence - most of his customers are more interested that they are from Lollar, than about any technical details. So he may consider those secondary to the business. That's pretty much the norm with custom builders.
Often, technical language is employed more to create an image of knowledge and competency than for practical reasons. Knowing that most of the audience is not qualified to fully understand or fact check what you say.
I have a couple of Lollar pickups; they are very well made; if you want a special boutique pickup, he is one good guy to go to. "When iron or an iron-based (ferrous) metal moves within a magnetic field, it has the capacity to induce a current in any conductive material also in that magnetic field (i.e. the copper wire coil). This is inductance—a measure of the physical property to induce a current. In general, the greater the inductance, the greater the output and greater the bass response." Why be so nice about it? This is one of the stupidest things I have ever read about inductance. From it, you could not realize that an air core coil has inductance (or even just a piece of straight wire). You could not figure out that inductance is a property of a two terminal device (used to make up a network, a circuit), resistors and capacitors being the other two you need to know about. If you cannot explain what an inductor is or what it does, then you are not even qualified to get the physics behind it wrong. |
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