How and why was ASAR PICKUPS born? How do these pickups differ from the others?
With the same size and shape of the magnets, the neodymium ones, more precisely NeFeB, generate magnetic fields which, to put it very simplistically, boast much higher energy densities than in the case of the fields, instead, produced by other types of magnets commonly used for making both guitar pickups and speakers. These are AlNiCo (including grade 5), ferrite (or ceramic magnets if you prefer) and the samarium-cobalt alloy (SmCo).
Just to give a rough but explanatory example, imagine making a Stratocaster single coil pickup around the usual cylindrical magnets, but neodymium instead of being made of the classic sintered AlNiCo alloy.
Well, once the pickup is made and installed on the guitar, the magnetic field produced by the magnets would be so intense that it is practically impossible to play the guitar itself.
So much so that, as in the classic case of ceramic magnets (those dark gray bars that you have probably seen attached under some pickups), even the neodymium ones are normally used, in pickups, together with pole pieces made of carbon steel plated with nickel, which have the task of interfacing between the real magnets (placed in the lower part of the pickup) and the strings. In other words, the aforementioned polar expansions do nothing, once placed in close contact with the magnets, other than act as conductors of the magnetic field, which otherwise alone they would not be able to produce, towards the strings.
The most clever will immediately understand
how it is possible to juggle with the dimensional relationships between the
magnets and the polepieces to generate more or less intense magnetic fields.
These magnetic fields, by appropriately and simultaneously managing the size (also
understood as the number of coil turns) and geometry of the winding as well as
the thickness of the wound wire, allow the sufficiently experienced
manufacturer to vary, even by a lot, the sonic characteristics of the pickup
that intends to realize.
Attack, soustain, output levels, more or less
bright or fat tone, contrast, richness of harmonics (on which hand winding of
the coils and the conducting style of the winding are also typically influent),
are all factors which can be varied more or less at will by the expert
manufacturer.
However good and experienced he may be,
however, there are intrinsic limits of an eminently physical nature, beyond
which it is not possible to go anyway. With the same spools and types of wire
used (but also pole pieces), these impassable limits are dictated precisely by
the peculiar characteristics of each type of magnet, of which I have already
mentioned the most widespread and commonly available categories for the
construction of guitar and bass pickups, without going unnecessarily into the
sub-categories and classifications of each one.
As for me, a few years ago, that is in 2014, I
wanted to take away the satisfaction of building some pickups on my own, but
not so much for the sake of mere DIY, but with the intention of trying to
achieve something, in particular, that maybe it left its mark not only on
myself, but also on my guitarist friends. Unlike what I experienced in my
thirty-year experimentation with amplifications, in which I have always had a
very similar approach, the pickups seemed to be too simplified machines, at
least in the number of components influencing the result and their available
variables, to allow any "lift of genius” that could actually make the
difference.
I must admit that I came across a video published
by some good hobbyist on YouTube, almost by chance, in the same year,
explaining how to "upgrade" guitar pickups by simply replacing the
stock ceramic magnets with neodymium ones.
Neodymium was a material that was already
known to me for its use in the loudspeaker sector and for the superior
performance that these same speakers (alas, higher in cost) boast compared to
their colleagues equipped with the almost ubiquitous ferrite or some replica
cases vintage of AlNiCo equipped speakers.
So it was that ... I was conquered by the idea
of trying in my turn, to touch the goodness of the idea firsthand. Especially
since, until that moment I had never heard of commercial pickups made around
neodymium magnets. So I did a quick online search from which I discovered
Entwistle in England and a craftsman in New York (if I remember correctly), and
I-SPIRA pickup from us in Italy. That was enough for me to get the
"hint" and from there I no longer started researching in this sense.
The next step was, of course, to investigate
the possibilities of finding neodymium magnets of sufficient size, quality and
quantity to make at least some pickups without necessarily having to take out a
trentennial mortgage.
Since, since then, I have made dozens of
neodymium pickups (but also ceramic ones), both for guitar and bass, the answer
is obviously affirmative.
After the first, exciting experiments quite
well exitated, I began to get carried away to fine-tune several sets of pickups
and even pre-wired pickguards (mainly for Strat, but now I've started to do
some for Precision 4-string bass too).
I wrapped my first pickups with a wrapping
machine that I had crouched on a wooden frame, using, as a crank, that of the
machine to make fresh pasta . So I made my first pickups by winding them
completely by hand, in the sense that while the right hand guided the lwire
into the bobbin, the left operated the crank that made the spool rotate.
Now I don't know I would still have all that
patience, however within a few months, after having procured the right
material, first of all the electric motor, I designed and built the electric
winder that I still use today.
Obviously, in my pre-wired pickguards I only
install pickups of my own production and, in their conception and construction,
I believe I have done my best not only with regard to the electromagnetic
shielding of the pickguards themselves and the pickups, but also in terms of
versatility of use. In fact, having the pickguards for Strat typically three
pickups installed, it is my custom to also install one or more switches (almost
always of the push pull type) in order to:
1) allow the connection (always in parallel)
also of the neck pickup with the bridge pickup, as well as the classic bridge +
central and central + neck, typical of positions 2 and 4 of the 5-way selector;
2) allow you to split the humbucker at the
bridge (HSS) or both the humbucker at the bridge and the neck (HSH) depending
on the pickup configurations adopted, as my pickups are always characterized by
lively charachters and generous output levels to which, even when in humbuckers
only one coil is operated, their single coil sound is more than believable and
it would be a shame not to use it.
Furthermore, since more often than not I
produce single coil pickups (by the way: P90, Strat and Telecaster bridge)
so-called "coil tap", that is, equipped with a single coil but
equipped with both the output taken at the end of the winding and a 'output
taken at an intermediate level, the last switch named can be used, instead of
splitting the humbucker (s), to select the COIL TAP / FULL COIL output of the
coil tap bridge pickup, or the same outputs if they are coil tap both the
bridge and neck pickups. I have also produced and produce pre-wired pickguards
equipped with a bridge humbucker (PAF-like or Hot Rails-like dimensions) and a
Strat single coil "coil tap" installed on the neck so that the
switch, typically installed on the third knob, splits at the same time the
humbucker and “coil tap” the Strat single coil.
I hope that anyone who has been able to read
this far hasn't had a headache or other discomfort ...
Someone might ask, at this point, if I make
only and always pickups equipped with neodymium magnets or not.
The answer is no, as I also make ceramic ones
because, although they are cheaper and at least to a certain extent less
complex to produce, they still boast more than decent performances, even if,
intuitively, not of the absolute at the top as in the case of neodymium.
I have never made and never will make any
pickup equipped with AlNiCo magnets, for three precise reasons:
1) It will be my personal whim, but I don't
like the fact that, since AlNiCos are not natural but induced magnets, in the
same way (relatively easy, at least in the factory) with which they can be
magnetized, just as easily or accidentally, they can come demagnetized.
The latter could happen, in theory, even with
neodymium magnets, but only if they were to exceed the temperature of 80
degrees Celsius at which, however, I believe that not only the magnets installed
in the pickups should be thrown away, but the same musical instrument. I do not
think it is easy to find a musician capable of leaving his guitar in a car
exposed to the sun and with the windows completely closed, in summer and in a
hot country.
2) I am not enthusiastic about
"vintage" sounds and, in any case, there is such a boundless and too
often homogeneous production of AlNiCo pickups (also for reasons of force
majeure) that, also for the originality and effectiveness innovation reasons
above mentioned, do not arouse my interest at all.
3) As for sonic performances, both on paper
and based on the results of the "American style" comparisons (not
boundless but in any case anything but episodic) that I have experienced
together with guitarist friends on the same types of pickups, I mean humbucker
vs humbucker, P90 vs P90, Strat sigle coil vs Strat single coil and so on, the
typical trend is characterized by generally compressed and euphonic sounds of
AlNiCo, even famous ones, compared to the greater dynamics, contrast, depth,
touch response and extension in frequency of my neodymium ones.
With neodymium the clean sounds are of a
disarming naturalness and depth while, thanks above all to the richness of
harmonics, the distortions are really full, granite and consonants at the same
time.
Waxing topic: I mix pure paraffin with beeswax
purchased from beekeepers in my area, in a 3:1 ratio (weight / weight). I melt
the wax inside a glass jar of the appropriate size, heating it in a water bath.
Then I immerse each wrapped coil in it (obviously when the wax is in the right
temperature range) for about fifteen minutes. This, together with a certain
treatment that I carry out on my reels (of industrial origin) and following the
necessary destructive tests performed on the samples, makes me sure that my
waxing method also reaches the innermost turns of the reels. So much so that,
since I developed it, I have never had "squeal" problems with my
pickups, nor have they ever been reported to me by those who bought them.
I also published a short video, about the
creature, in which you can see the bubbles of air that leave the inside of the
coil to make room for the wax. The video link is the following: https://www.youtube.com/watch?v=DXQqwbUemyc
Finally, the official channel with which, at
least currently, I am exhibiting my pre-wired pickups and pickguards to the
public, is the window of my virtual shop ASAR boutique amplification &
pickups which can be found on the Reverb.com website.
Anyone wishing, for various reasons, to
contact me directly, can do so via the email address
asar.amplification@gmail.com. If it's not some time wasters, I usually reply
within a few days at the latest.
As for the demonstration videos topic, since I
am practically only a former electric bassist (despite myself, due to lack of
free time), as well as an electronic technician, it is not easy for me to
organize myself in this regard. That's not definitely for the future, however,
until recently I improvised some amateur videos together with a guitarist
friend of mine, I elaborated them and then published them on my ASARchannel
YouTube channel. If you really want to get at least a vague idea about my
pickups sound...
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