Tube Overdrive
Tube Overdrive
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Electric Guitar Clinic: Would you like single coils or humbuckers with that?
In this article we will take a look at some of the differences between Humbucking pickups and Single Coil pickups, both technically and tonally. Many think, "Isn't a Humbucker just two Single Coils side by side?" The answer is both yes and no as they both yield quite different tonal and technical characteristics. There have been many attempts to harness both sounds in one guitar or pickup, but the general consensus is that a guitar is either a Humbucking guitar or a Single Coil. Like they say, you can't have your cake and eat it too.
How a Pickup Works
To start out, let's talk a little about how a pickup works. A guitar pickup is essentially a magnet that creates a magnetic field right above the pickup. The magnet picks up the vibrations of the strings and sends the signal to your amplifier to be amplified. Most pickups in electric guitars are passive which means that they don't have any kind of pre-amp and it is the amplifiers job to boost the signal. Contrastingly, an active pickup uses weaker magnets than passive pickups but has a pre-amp to boost the signal output to a reasonable level. Active pickups are most common in acoustic guitars but can be found in a few electric guitars as well.
Single Coils: The First Pickups
Single Coils were the first pickups. The first single coil guitar pickups came in the late 1920's. A single coil pickup, as the name implies, is made up of a single coil of wire wrapped in one direction (either clockwise or counter clockwise) around the pole pieces. The pole pieces are the circular metal pieces under each string. One of the problems in early single coil pickups was that they picked up a lot of electromagnetic interference from other electric machinery or radio waves, which caused a buzz or hum
Why Humbuckers Were Invented
Humbuckers were invented to cancel out the electromagnetic interference. They use two coils, which are wrapped in opposing directions to give each coil opposing polarity. This would cancel out the electromagnetic interference and help get rid of the hum, thus creating a "hum-bucking" pickup. Humbuckers did not start showing up in guitars until the mid 1950's. When it comes to tonal differences, it gets a little harder to explain and really comes down to personal opinions and preferences.
Common Misconceptions About Humbackers
Many people think humbuckers are for distortion and overdrive, and single coils are for clean patches. This isn't necessarily the case because many guitarists use single coils for high gain distortion and others use humbuckers exclusively for clean tone. Humbuckers tend to be hotter pickups because they utilize two coils which does make them easier to distort. However, many jazz box guitars have humbuckers and are almost always used for a clean patch. They produce a thicker and darker clean tone than single coils do. The clean from single coils is a more sparkly high type clean that is often associated with country or "Eric Clapton Style" blues. They also are not as quick to overdrive as humbuckers. When single coils are played through a smooth tube overdrive, you can still hear the clean coming through where it gets lost with a humbucker.
Typical Guitars that use Humbuckers
Typical guitars that use humbuckers are the Gibson Les Paul, Gibson SG, most PRS models, most Ibanez guitars, and almost all hollow body Guild's and Gretch's. The most common single coil guitars are the Fender Stratocaster and Telecaster.
Increased Versatility of Both
Over the years, each style of pickup has become more versatile. Some humbuckers have the option of coil splitting or tapping. This is the ability to essentially shut off one of the coils in the pickup which can provide a fairly good representation of a single coil pickup. Single coils have gotten much better about electromagnetic interference and there are several "noiseless" single coil pickups available. However, this does not solve the single coil vs. humbucker conundrum because you only get a solid emulation.
The "Fat Strat"
Fender has attempted to solve the problem by creating the "Fat Strat," which utilizes a humbucking pickup at the bridge and two single coil pickups in the usual Stratocaster location. It does thicken the sound when using the humbucker, but there isn't the option running two humbuckers together as you can in a Gibson Les Paul or SG for a truly saturated overdrive. The guitar also loses some of the ability to get the really twangy bridge sound you can achieve with the single coil pickup.
Single coils and humbuckers are very different animals, and if you want both sounds, you need two guitars. If you need to choose one guitar, the best way to go about it is to go play several different guitars with different pickups through different amps and choose the one you like best.
About the Author
Matt Griffith, born and raised in Western Colorado, made the leap to move to Nashville 5 months ago to pursue a career in music along with the thousands of other hopefuls that call Music City home. Matt loves electric guitars and is currently playing lead guitar for the band Brookline. He writes electric guitar reviews for Music Gear Review.
Best way to overdrive a tube amp?
I got a re-issued Fender Bassman tube amp. Its a pretty good size. It doesn't have any dirty channels. But I heard if I tug the tubes out a bit and turn the amp up loud enough and get it hot enough it will overdrive. What is the safest way to overdrive my tube amp without using a pedal?
Do NOT pull your tubes out a bit - that is a Bad Idea!
On a tube amp without a master volume you have no alternative to simply cranking the volume.... unless, of course, you use pedals, modify the circuitry of your amp, change your tubes, or get an attenuator.
Um, don't modify your amps circuitry. Nevermind that I said that.
Change your tubes - what I mean by this is getting power converter sockets that let you put lower wattage tubes in your power tube sockets. Ruby and THD make 'em, for instance.... um, the THD versions are called Yellowjackets. The basic idea is that they lower your amps wattage, which means that you get more distortion at lower volumes.
An attenuator... this lowers the volume of what your amp puts out. The cool thing is that you can push your amp a little harder, so you get more distortion at lower volumes.
Finally, you can use a pedal to boost your signal. This can come in the form of an EQ pedal, an overdrive pedal like a Tubescreamer, a distortion pedal with the gain turned down low and the level turned up (Kurt Cobain and Randy Rhoads did this, btw), or something like active pickups or having a preamp built into your guitar to boost the signal there.
The safest way to push your tube amp is to use a pedal or high-output pickups, but this forms preamp distortion, and not power amp distortion, which is subtly different. The only way to get power amp distortion is to push your power tubes harder, and the only way to do that is to crank them..... so either crank lower-wattage power tubes or use an attenuator (I recommend the THD Hot Plate).
The whole point of doing this is that tubes get really bloody loud when you crank them. Using an attenuator and/or these lower wattage tubes (which aren't as quiet as I'm probably making them out to be, I've got a 5w tube amp that goes right through the walls in my condo) allows you to crank your tube amp and get that cranked sound at a volume that isn't louder than the drum set, blowing out windows, etc.
Saul
Hardwire Tube Overdrive CM-2