Pickup String Spacing – choosing a humbucker

 

Pickup string spacing is something you need to be aware of when you’re buying guitar pickups, particularly humbuckers. Guitar bridges come with different string widths so pickups need to match that. In this blog post I’m going to explain what It’s all about and how to measure it.

Table of Contents

What is a Pole Piece?

What you don’t need to know

Pickup String spacing – what you need to know

How to measure string spacing

What is F spacing?

What is a Pole Piece?

Pickups have pole pieces, think of these as magnets mounted in the pickup listening for string movement. Sometimes they are actual magnets, sometimes pieces of steel directing magnetism towards the strings. In this case they are steel screws.

This is what we mean by ‘pole spacing’ its the distance between the outer most poles, centre to centre.

What you don’t need to know

The way a pickup works is the string sitting inside the magnetic field actually becomes a temporary magnet and when it vibrates it disturbs this magnetic field and creates an electrical signal in the coil of wire around the magnet.

It’s a tiny signal but enough to get through your guitar’s on board circuit and down a cable to an amplifier. It’s hard to imagine that such a small amount of electricity can produce such a lot of sound. Have a think about it next time you’re at a big gig. What you’re hearing is just that small amount of electricity generated in a coil of wire. It’s really cool stuff and I find it fascinating. But you don’t really need to know all that.

Pickup String spacing – what you need to know

What you do need to know is that the string needs to align with the magnet to get the best signal. Magnets are, however, not lasers, they generate a magnetic field and not a precise beam. If the string isn’t in perfect alignment it’s fine. If the slightest misalignment made a difference then string bending would cause a drop in volume. Have a look next time you bend a string how far the string moves away from the pole.

As you can see, a little bit out of line makes no difference. Eddie Van Halen used a vintage PAF on Van Halen I with a Fender type bridge – the PAF ‘s were 49.2mm (1 15/16″) spacing and Fender bridges are usually 52mm. If there had been a problem he would have noticed.

Please remember that if a humbucker has 49.2mm spacing or 52mm spacing it’s outer dimensions are the same. The overall size of the pickup doesn’t change. So if you take out a 49.2mm humbucker and replace it with a 52mm it will still fit, it’s just the pole alignment to the strings that will be different.

Guitar bridges come in various sizes giving different string spacing. So if you have a Gibson ABR Tune-o-matic your string spacing will be narrower than a Fender Strat bridge, for instance.

By the time the strings get to the neck pickup the spacings are just about the same so neck pickups don’t vary in width. We’re just talking about bridge pickups here.

So we really want the strings to line up as best as possible with the pickup’s poles but we’re not getting too hung up on it.

How to measure string spacing

The measurement is the distance from the first to the sixth strings centre to centre at the bridge pickup. This diagram should help:

You can simply do this with a ruler, like I have.

As you can see this ’89 Strat bridge has 52mm string spacing. If you wanted to choose a bridge humbucker to make it a HSS Strat than choose the 52mm option.

If you’re buying a Mr Glyns Pickup and have any doubt just send me a pic of your bridge and I should be able to advise you.

What is F spacing?

F spacing simply means a wider spaced bridge humbucker – 52, 52.5 or 53mm. The F stands for either ‘Fender’ or ‘Floyd Rose’. It isn’t clear which and doesn’t really matter.

Why 49.2mm not just 49mm? You may well ask! It’s the metric equivalent of the pole spacing for a Gibson PAF which is the pickup most humbuckers are based on. The original measurement in imperial is 1 15/16″ – which if you ask me is no less silly a number that 49.2 but we’re stuck with it.

If this has given you a need for a new set of humbuckers you can find the Mr Glyns Pickup humbucker range here.

Here is a link to my YouTube playlist for humbucker demos.

Hamurana Guitars NZ

 It’s always interesting to see where my pickups end up, in this case Hamurana Guitars NZ.

Hamurana Guitars

They make World class guitars combining looks, playability and tone. I’ve played a few – they are outstanding.

Hamurana have used my pickups in a few builds and it’s always great to see what he comes up with. This time he’s used a pair of my my Black Sand humbucker size P90’s.

You can get in touch with Hamurana Guitars and order your dream guitar here:

https://www.hamuranaguitarworks.co.nz/

Here’s more info on the Black Sand pickups:

The humbucker sized P90 is a great pickup – it sits tonally between a humbucker and and a strat type pickup. If your neck humbucker is a bit thick and woolly sounding for you, you want more clarity, or just want a different tone, then this one may be the answer. The physical size of this pickup is identical to that of a “normal” humbucker so it will pop straight in.

P90’s are different to other single coil pickups. They have a wide, flat coil similar to that of a Jazzmaster but the magnetic field is a very different shape. Fender single coil pickups have the coil wound around the magnet giving a focused, precise percussive sound. A P90 has 2 bar magnets underneath the coil; this broadens the magnetic window allowing the pickup to listen to a bit more string and thickens the sound. I chose Alnico V bar magnets for this model to help give some grit and power characteristic of a P90.

Of course, too much power and the pickup would sound too thick and bass heavy which is not its purpose. Too little power and it just won’t snarl.

Humbucker sized P90s are such a useful pickup. They sit tonally between a single coil and a humbucker (roughly speaking). and their physical size means they pop straight into any humbucker equipped guitar.

The development of my “Black Sand” pickup was a bit backwards. Usually I make a bridge pickup first and work from there but with this one the neck pickup came first. I had a customer ask for a neck pickup for an es335 to sound clearer than his existing Gibson humbucker. I sold a few neck pickups before thinking it would be a good idea to have a set. So I started work on the bridge pickup.

I wanted this bridge pickup to have clarity in the lower mids to stand out from humbuckers while having enough power to grit up nicely. I wanted it to be clean when tickled and to growl at you when you dig in. P90’s are all about dynamics. It had to match the existing neck pickup or work well as a stand alone in a HSS situation.

Of all the pickups in my range this one came together the quickest. There were only 4 or 5 prototypes and I was happy. Experience and intuition combined with a notebook where I’ve written down details of every experimental pickup I’ve made since 1995.

There were a load of prototypes in and out of a Les Paul, Tele Delux and PRS, through different amps and in the hands of different players. I never trust just my own ears with my pickups. I like to get opinions and suggestions from a few players before making any final decisions. I listen to what players say and I adjust prototypes accordingly, but at the end of the day the final decision is mine. I’m always aware of the phrase “a camel is a horse designed by committee”.

It took a while to get this one right. A pickup would sound great at workshop volume, them I’d play it in a band situation and it would be too boomy, too much like a humbucker. So I’d have a think and make another. In the end persistence paid off.

The pickups I finally settled on went into my Les Paul and off to a gig for the ultimate test, and that’s where they’re staying.

The neck “Black Sand” is a great match for either my “Integrity” or “Cloud Nine” bridge humbuckers or as a set with its equivalent “Black Sand” bridge humbucker sized P90.

I agonised over what to call this pickup set. I wanted a name that would reflect the apparent contradiction in P90’s. From the perspective of a humbucker player they are clear and chiming. From the viewpoint of a single coil player they are powerful and gritty. They’re one thing while looking like another. I wanted a oxymoron to reflect this contradiction, one that might include the unique magnetic structure that gives the P90 its character. So I went for a run along Muriwai beach to think. And there it was staring me in the face (literally). Muriwai has black volcanic sand due to its iron content and it’s magnetic. So I’ve called this set “Black Sand”.

I’m very happy with this pickup – hopefully you will be too.

Mr Glyns Pickups

Minx – mini humbucker

 If you love your mini humbucker guitar but want a bit more power than standard Deluxe style pickups the ‘Minx’ mini humbucker is the pickup for you.

The Minx has plenty of that mini humbucker clarity and tonality but with more power and more grit.

The ‘Minx’ is a clean clear sounding mini humbucker but with more power than the vintage Gibson’s. There is warmth and clarity but with more powerful windings than the ‘Mini’ along with an alnicoV magnet they will push your amp harder.

AlnicoV – Bridge 10.5 KOhms, AlnicoV – Neck 6.6KOhms

With narrower coils than a PAF mini humbuckers ‘hear’ a narrower part of the string resulting in cleaner highs, a less pushy lower mid range and a distinctive clear bass that’s never woofy or wooly.

The neck pickup has the same coils as the ‘Mini’ but with an alnicoV magnet they have a fatter power and make a great match to the Minx bridge pickup.

The bridge pickup has a characterful mid range with a bite and fullness that is lacking in most mini humbuckers. You wouldn’t describe this pickup as polite and it will certainly put you towards the front of any mix.

Great for the blues or rock player after dynamics – tickle it and it’s clean but when you dig in there’s enough power to push the front end of your amp into break up when you ask it to.

Although he Les Paul Deluxe was a short lived guitar in the Gibson range the mini humbucker has lived on. It is a very popular pickup in custom guitars particularly the neck pickup and is a great match for Mr Glyn’s ‘Cruel Mistress’ telecaster bridge pickup.

If you’re looking for a pickup that is clearer than a PAF, has a less prominent lower mid spike with an even balanced tone then the mini humbucker could be the pickup for you.

For a lower powered mini humbucker take a look at the ‘Mini’ https://mrglynspickups.com/2021/11/12/mini-humbucker/

https://mrglynspickups.com/

‘Mini’ – mini humbucker

The ‘Mini’ is inspired by the Gibson mini humbuckers of the 70’s used in the Les Paul Deluxe.

The ‘Mini’ is a clean clear sounding mini humbucker with the warmth and clarity from an alnico II magnet combined with low winding strength. This gives them a full, smooth, chiming bass, clear mids and an almost jangly treble, present but never harsh.

 Alnico II – Bridge 7.25 KOhms, Alnico II – Neck 6.6 KOhms

Great for jazz, funk, blues, pop or any genre that requires a clean, low powered humbucker set.

Mini humbuckers are great pickups, lower in power than their full size sisters their clarity comes from less windings around a smaller bobbin. The smaller size of the pickup means they ‘hear’ less of the string length than a full size humbucker. The result is a clearer tone with less of the lower mid range push that you get from a PAF.

The neck pickup has a clear voice ideal for funk or jazz. The neck and bridge pickups together have a perfect balance when used together, ideal for clean rhythm playing. The bridge pickup alone has a cheeky ‘cut through’ quality pushing you to the front of any mix.

Although he Les Paul Deluxe was a short lived guitar in the Gibson range the mini humbucker has lived on. It is a very popular pickup in custom guitars particularly the neck pickup and is a great match for Mr Glyn’s ‘Cruel Mistress’ telecaster bridge pickup.

If you’re looking for a pickup that is clearer than a PAF, has a less prominent lower mid spike with an even balanced tone then the mini humbucker could be the pickup for you.

The Mini has a more powerful sister – the Minx https://mrglynspickups.com/2021/11/11/minx-mini-humbucker/

https://mrglynspickups.com/

"Black Sand" humbucker size P90's

 A big thanks to Brett Kingman in Aussie for his demo of Mr Glyns "Black Sand" humbucker size P90's. I love his relaxed approach while giving us a thorough listen to what these pickups can do.

The humbucker sized P90 is a great pickup – it sits tonally between a humbucker and and a strat type pickup. If your neck humbucker is a bit thick and woolly sounding for you, you want more clarity, or just want a different tone, then this one may be the answer. The physical size of this pickup is identical to that of a “normal” humbucker so it will pop straight in.

P90’s are different to other single coil pickups. They have a wide, flat coil similar to that of a Jazzmaster but the magnetic field is a very different shape. Fender single coil pickups have the coil wound around the magnet giving a focused, precise percussive sound. A P90 has 2 bar magnets underneath the coil; this broadens the magnetic window allowing the pickup to listen to a bit more string and thickens the sound. I chose Alnico V bar magnets for this model to help give some grit and power characteristic of a P90.

Of course, too much power and the pickup would sound too thick and bass heavy which is not its purpose. Too little power and it just won’t snarl.

Humbucker sized P90s are such a useful pickup. They sit tonally between a single coil and a humbucker (roughly speaking). and their physical size means they pop straight into any humbucker equipped guitar.

The development of my “Black Sand” pickup was a bit backwards. Usually I make a bridge pickup first and work from there but with this one the neck pickup came first. I had a customer ask for a neck pickup for an es335 to sound clearer than his existing Gibson humbucker. I sold a few neck pickups before thinking it would be a good idea to have a set. So I started work on the bridge pickup.

I wanted this bridge pickup to have clarity in the lower mids to stand out from humbuckers while having enough power to grit up nicely. I wanted it to be clean when tickled and to growl at you when you dig in. P90’s are all about dynamics. It had to match the existing neck pickup or work well as a stand alone in a HSS situation.

Of all the pickups in my range this one came together the quickest. There were only 4 or 5 prototypes and I was happy. Experience and intuition combined with a notebook where I’ve written down details of every experimental pickup I’ve made since 1995.

There were a load of prototypes in and out of a Les Paul, Tele Delux and PRS, through different amps and in the hands of different players. I never trust just my own ears with my pickups. I like to get opinions and suggestions from a few players before making any final decisions. I listen to what players say and I adjust prototypes accordingly, but at the end of the day the final decision is mine. I’m always aware of the phrase “a camel is a horse designed by committee”.

It took a while to get this one right. A pickup would sound great at workshop volume, them I’d play it in a band situation and it would be too boomy, too much like a humbucker. So I’d have a think and make another. In the end persistence paid off.

The pickups I finally settled on went into my Les Paul and off to a gig for the ultimate test, and that’s where they’re staying.

The neck “Black Sand” is a great match for either my “Integrity” or “Cloud Nine” bridge humbuckers or as a set with its equivalent “Black Sand” bridge humbucker sized P90.

I agonised over what to call this pickup set. I wanted a name that would reflect the apparent contradiction in P90’s. From the perspective of a humbucker player they are clear and chiming. From the viewpoint of a single coil player they are powerful and gritty. They’re one thing while looking like another. I wanted a oxymoron to reflect this contradiction, one that might include the unique magnetic structure that gives the P90 its character. So I went for a run along Muriwai beach to think. And there it was staring me in the face (literally). Muriwai has black volcanic sand due to its iron content and it’s magnetic. So I’ve called this set “Black Sand”.

I’m very happy with this pickup – hopefully you will be too.

https://mrglynspickups.com/