This 1968 Epiphone Al Caiola Standard came stocked with P-90s and a 5-switch Tone Expressor system.
Photo courtesy of Guitar Point (guitarpoint.de)
The Epiphone Al Caiola model was built in the Gibson Kalamazoo factory and was similar to an Epiphone Sheraton, with a longer 25 1/2" scale. It was built from late 1963 until 1969 and was available with different pickups like Gibson mini-humbuckers and P-90s. The guitar would be renamed the Al Caiola Custom to make way for the Al Caiola Standard that was introduced in 1966, but both models had the Tone Expressor system.
The guitar has a Telecaster-like wiring configuration: two pickups, master volume and master tone, 2-way pickup-selector switch. Since the circuit only has a 2-way switch instead of a 3-way switch, you can’t play both the neck and bridge pickup at the same time. (Maybe Al Caiola didn’t like a middle-position sound; who knows?) There are also five additional mini-slider switches labeled 1—5 which make up the Tone Expressor system.
“With the individual slider switches of the Tone Expressor system, you can combine all five switching positions in any way you like, so you have countless possible combinations.”
Having a look under the hood reveals the Gibson Varitone system used on the ES models. My first thought was this was new wine in old bottles, but after having a deeper look, there are differences between the standard Gibson Varitone and the Tone Expressor system. The Gibson Varitone uses a 1.5 H inductor, while the Tone Expressor system has a 15 H inductor on board. The Varitone is a rotary switch, so you can only dial in one of the switching positions, no combinations. With the individual slider switches of the Tone Expressor system, you can combine all five switching positions in any way you like, so you have countless possible combinations. Electronically, the Tone Expressor is a switchable band-rejection filter; mids are attenuated and the result is a crisp, more twangy tone.
In this first of two parts about this very special circuit, I want to describe the switching positions of the Tone Expressor system. First, here are the individual parts:
• 500k audio master volume and master tone pot with a 0.02 μF tone cap. This configuration will work with mini-humbuckers as well as P-90 pickups.
• 2-way pickup-selector slider switch. Having the possibility to engage both pickups together (no matter if in parallel or in series) would enhance this wiring noticeably.
• 15 H inductor (choke). The inductor in this circuit creates a series of notch filters together with the caps of the individual switches, so the circuit doesn’t remove all signal above a certain frequency, but only a certain amount above and below that frequency. There is a lot of debate about using an inductor or not, and if so, what type.
Personally, I think adding an inductor is not the best choice. The design may have worked at the time, but today, most of us are looking for different sounds. While the Varitone has its fans, it was never very popular because it can suck tone, and a lot of people say that it doesn’t have a major effect anyway.
If you want to use an inductor and find a matching one, these have center-tapped primaries and secondaries. Use the entire primary or the entire secondary, and ignore center taps for the Varitone wiring. I had the chance to measure several original inductors (labeled TF-90-1C), and they all showed something between 12 H and 17 H; keeping their tolerances in mind, you can use any inductor in this ballpark.
• 10 M resistors. There is a 10 M resistor connected to the circuit in series to each of the five caps. These “pull-down” resistors prevent loud popping noises when using one of the switches—standard when switching capacitance like on the Varitone system.
• 100k resistor. Together with the caps on the switches, the single 100k series resistor creates a frequency selective voltage divider, which is essential to create a proper frequency notch. The value is well-chosen so there is no need to replace it.
On the Varitone rotary switch, position No. 1 is the bypass mode. The Al Caiola, with its slider switches, naturally doesn’t need an extra switch for this. When no switch is engaged, the Tone Expressor system is in bypass mode. In general, we can say that the bigger the cap, the thinner the tone, and vice versa. Or in other words: The bigger the cap, the more the humbucker tone is tidied up towards a more twangy and single-coil-like tone.
An up-close look at the controls for the Tone Expressor system.
Photo courtesy of Guitar Point (guitarpoint.de)
Here is what each switching position does:
• Switch No. 1 with 1000 pF cap corresponds to position two of the Varitone rotary switch and has a very subtle effect. It’s an unmistakably PAF-style humbucker tone, but with the bass frequencies tidied up a little. This setting can help cut through a mix and will prevent a boomy, woolly tone when playing full-tilt.
• Switch No. 2 with 3000 pF cap corresponds to position three of the Varitone rotary switch and is my favorite setting. Still a PAF-style humbucker tone, but tighter and with more transparency. This tone never gets too boomy and rides on the edge of the P-90 territory.
• Switch No. 3 with 0.01 μF cap corresponds to position four of the Varitone rotary switch. This reminds me of a typical P-90 tone with a tight bass and clarity in the high frequencies—very cool for some break-up blues playing.
• Switch No. 4 with 0.03 μF cap corresponds to position five of the Varitone rotary switch and is a very twangy and single-coil like setting that sounds like a Stratocaster—very useful and versatile.
• Switch No. 5 with 0.22 μF cap corresponds to position six of the Varitone rotary switch and is the most twangy setting. It reminds me a lot of a good Telecaster, especially with the bridge pickup.
Next month, we will look into different ways to set up and mod this circuit, so stay tuned!
Until then ... keep on modding!
Keith Urban’s first instrument was a ukulele at age 4. When he started learning guitar two years later, he complained that it made his fingers hurt. Eventually, he came around. As did the world.
He’s in the Songwriters Hall of Fame. He’s won 13 Country Music Association Awards, nine CMT video awards, eight ARIA (Australian Recording Industry Association) Awards, four American Music Awards, and racked up BMI Country Awards for 25 different singles.
He’s been a judge on American Idol and The Voice. In conjunction with Yamaha, he has his own brand of affordably priced Urban guitars and amps, and he has posted beginner guitar lessons on YouTube. His 2014 Academy of Country Music Award-winning video for “Highways Don’t Care” featured Tim McGraw and Keith’s former opening act, Taylor Swift. Add his marriage to fellow Aussie, the actress Nicole Kidman, and he’s seen enough red carpet to cover a football field.
Significantly, his four Grammys were all for Country Male Vocal Performance. A constant refrain among newcomers is, “and he’s a really good guitar player,” as if by surprise or an afterthought. Especially onstage, his chops are in full force. There are country elements, to be sure, but rock, blues, and pop influences like Mark Knopfler are front and center.
Unafraid to push the envelope, 2020’s The Speed of Now Part 1 mixed drum machines, processed vocals, and a duet with Pink with his “ganjo”—an instrument constructed of a 6-string guitar neck on a banjo body—and even a didgeridoo. It, too, shot to No. 1 on the Billboard Country chart and climbed to No. 7 on the pop chart.
His new release, High, is more down-to-earth, but is not without a few wrinkles. He employs an EBow on “Messed Up As Me” and, on “Wildfire,” makes use of a sequencerreminiscent of ZZ Top’s “Legs.” Background vocals in “Straight Lines” imitate a horn section, and this time out he duets on “Go Home W U” with rising country star Lainey Wilson. The video for “Heart Like a Hometown” is full of home movies and family photos of a young Urban dwarfed by even a 3/4-size Suzuki nylon-string.
Born Keith Urbahn (his surname’s original spelling) in New Zealand, his family moved to Queensland, Australia, when he was 2. He took up guitar at 6, two years after receiving his beloved ukulele. He released his self-titled debut album in 1991 for the Australian-only market, and moved to Nashville two years later. It wasn’t until ’97 that he put out a group effort, fronting the Ranch, and another self-titled album marked his American debut as a leader, in ’99. It eventually went platinum—a pattern that’s become almost routine.
The 57-year-old’s celebrity and wealth were hard-earned and certainly a far cry from his humble beginnings. “Australia is a very working-class country, certainly when I was growing up, and I definitely come from working-class parents,” he details. “My dad loved all the American country artists, like Johnny Cash, Haggard, Waylon. He didn’t play professionally, but before he got married he played drums in a band, and my grandfather and uncles all played instruments.
One of Urban’s biggest influences as a young guitar player was Mark Knopfler, but he was also mesmerized by lesser-known session musicians such as Albert Lee, Ian Bairnson, Reggie Young, and Ray Flacke. Here, he’s playing a 1950 Broadcaster once owned by Waylon Jennings that was a gift from Nicole Kidman, his wife.
“For me, it was a mix of that and Top 40 radio, which at the time was much more diverse than it is now. You would just hear way more genres, and Australia itself had its own, what they call Aussie pub rock—very blue-collar, hard-driving music for the testosterone-fueled teenager. Grimy, sweaty, kind of raw themes.”
A memorable event happened when he was 7. “My dad got tickets for the whole family to see Johnny Cash. He even bought us little Western shirts and bolo ties. It was amazing.”
But the ukulele he was gifted a few years earlier, at the age of 4, became a constant companion. “I think to some degree it was my version of the stuffed animal, something that was mine, and I felt safe with it. My dad said I would strum it in time to all the songs on the radio, and he told my mom, ‘He’s got rhythm. I wonder what a good age is for him to learn chords.’ My mom and dad ran a little corner store, and a lady named Sue McCarthy asked if she could put an ad in the window offering guitar lessons. They said, ‘If you teach our kid for free, we’ll put your ad in the window.’”
Yet, guitar didn’t come without problems. “With the guitar, my fingers hurt like hell,” he laughs, “and I started conveniently leaving the house whenever the guitar teacher would show up. Typical kid. I don’t wanna learn, I just wanna be able to do it. It didn’t feel like any fun. My dad called me in and went, ‘What the hell? The teacher comes here for lessons. What’s the problem?’ I said I didn’t want to do it anymore. He just said, ‘Okay, then don’t do it.’ Kind of reverse psychology, right? So I just stayed with it and persevered. Once I learned a few chords, it was the same feeling when any of us learn how to be moving on a bike with two wheels and nobody holding us up. That’s what those first chords felt like in my hands.”
Keith Urban's Gear
Urban has 13 Country Music Association Awards, nine CMT video awards, eight ARIA Awards, and four Grammys to his name—the last of which are all for Best Country Male Vocal Performance.
Guitars
For touring:
- Maton Diesel Special
- Maton EBG808TE Tommy Emmanuel Signature
- 1957 Gibson Les Paul Junior, TV yellow
- 1959 Gibson ES-345 (with Varitone turned into a master volume)
- Fender 40th Anniversary Tele, “Clarence”
- Two first-generation Fender Eric Clapton Stratocasters (One is black with DiMarzio Area ’67 pickups, standard tuning. The other is pewter gray, loaded with Fralin “real ’54” pickups, tuned down a half-step.)
- John Bolin Telecaster (has a Babicz bridge with a single humbucker and a single volume control. Standard tuning.)
- PRS Paul’s Guitar (with two of their narrowfield humbuckers. Standard tuning.)
- Yamaha Keith Urban Acoustic Guitar (with EMG ACS soundhole pickups)
- Deering “ganjo”
Amps
- Mid-’60s black-panel Fender Showman (modified by Chris Miller, with oversized transformers to power 6550 tubes; 130 watts)
- 100-watt Dumble Overdrive Special (built with reverb included)
- Two Pacific Woodworks 1x12 ported cabinets (Both are loaded with EV BlackLabel Zakk Wylde signature speakers and can handle 300 watts each.)
Effects
- Two Boss SD-1W Waza Craft Super Overdrives with different settings
- Mr. Black SuperMoon Chrome
- FXengineering RAF Mirage Compressor
- Ibanez TS9 with Tamura Mod
- Boss BD-2 Blues Driver
- J. Rockett Audio .45 Caliber Overdrive
- Pro Co RAT 2
- Radial Engineering JX44 (for guitar distribution)
- Fractal Audio Axe-Fx XL+ (for acoustic guitars)
- Two Fractal Audio Axe-Fx III (one for electric guitar, one for bass)
- Bricasti Design Model 7 Stereo Reverb Processor
- RJM Effect Gizmo (for pedal loops)
(Note: All delays, reverb, chorus, etc. is done post amp. The signal is captured with microphones first then processed by Axe-Fx and other gear.)
- Shure Axient Digital Wireless Microphone System
Strings & Picks
- D’Addario NYXL (.011–.049; electric)
- D’Addario EJ16 (.012–.053; acoustics)
- D’Addario EJ16, for ganjo (.012–.053; much thicker than a typical banjo strings)
- D’Addario 1.0 mm signature picks
He vividly remembers the first song he was able to play after “corny songs like ‘Mama’s little baby loves shortnin’ bread.’” He recalls, “There was a song I loved by the Stylistics, ‘You Make Me Feel Brand New.’ My guitar teacher brought in the sheet music, so not only did I have the words, but above them were the chords. I strummed the first chord, and went, [sings E to Am] ‘My love,’ and then minor, ‘I'll never find the words, my,’ back to the original chord, ‘love.’ Even now, I get covered in chills thinking what it felt like to sing and put that chord sequence together.”
After the nylon-string Suzuki, he got his first electric at 9. “It was an Ibanez copy of a Telecaster Custom—the classic dark walnut with the mother-of-pearl pickguard. My first Fender was a Stratocaster. I wanted one so badly. I’d just discovered Mark Knopfler, and I only wanted a red Strat, because that’s what Knopfler had. And he had a red Strat because of Hank Marvin. All roads lead to Hank!”
He clarifies, “Remember a short-lived run of guitar that Fender did around 1980–’81, simply called ‘the Strat’? I got talked into buying one of those, and the thing weighed a ton. Ridiculously heavy. But I was just smitten when it arrived. ‘Sultans of Swing’ was the first thing I played on it. ‘Oh my god! I sound a bit like Mark.’”
“Messed Up As Me” has some licks reminiscent of Knopfler. “I think he influenced a huge amount of my fingerpicking and melodic choices. I devoured those records more than any other guitar player. ‘Tunnel of Love,’ ‘Love over Gold,’ ‘Telegraph Road,’ the first Dire Straits album, and Communique. I was spellbound by Mark’s touch, tone, and melodic choice every time.”
Other influences are more obscure. “There were lots of session guitar players whose solos I was loving, but had no clue who they were,” he explains. “A good example was Ian Bairnson in the Scottish band Pilot and the Alan Parsons Project. It was only in the last handful of years that I stumbled upon him and did a deep dive, and realized he played the solo on ‘Wuthering Heights’ by Kate Bush, ‘Eye in the Sky’ by Alan Parsons, ‘It’s Magic’ and ‘January’ by Pilot—all these songs that spoke to me growing up. I also feel like a lot of local-band guitar players are inspirations—they certainly were to me. They didn’t have a name, the band wasn’t famous, but when you’re 12 or 13, watching Barry Clough and guys in cover bands, it’s, ‘Man, I wish I could play like that.’”
On High, Urban keeps things song-oriented, playing short and economical solos.
In terms of country guitarists, he nods, “Again, a lot of session players whose names I didn’t know, like Reggie Young. The first names I think would be Albert Lee and Ray Flacke, whose chicken pickin’ stuff on the Ricky Skaggs records became a big influence. ‘How is he doing that?’”
Flacke played a role in a humorous juxtaposition. “I camped out to see Iron Maiden,” Urban recounts. “They’d just put out Number of the Beast, and I was a big fan. I was 15, so my hormones were raging. I’d been playing country since I was 6, 7, 8 years old. But this new heavy metal thing is totally speaking to me. So I joined a heavy metal band called Fractured Mirror, just as their guitar player. At the same time, I also discovered Ricky Skaggs and Highways and Heartaches. What is this chicken pickin’ thing? One night I was in the metal band, doing a Judas Priest song or Saxon. They threw me a solo, and through my red Strat, plugged into a Marshall stack that belonged to the lead singer, I shredded this high-distortion, chicken pickin’ solo. The lead singer looked at me like, ‘What the fuck are you doing?’ I got fired from the band.”
Although at 15 he “floated around different kinds of music and bands,” when he was 21 he saw John Mellencamp. “He’d just put out Lonesome Jubilee. I’d been in bands covering ‘Hurts So Good,' ‘Jack & Diane,’ and all the early shit. This record had fiddle and mandolin and acoustic guitars, wall of electrics, drums—the most amazing fusion of things. I saw that concert, and this epiphany happened so profoundly. I looked at the stage and thought, ‘Whoa! I get it. You take all your influences and make your own thing. That’s what John did. I’m not gonna think about genre; I’m gonna take all the things I love and find my way.’
“Of course, getting to Nashville with that recipe wasn’t going to fly in 1993,” he laughs. “Took me another seven-plus years to really start getting some traction in that town.”
Urban’s main amp today is a Dumble Overdrive Reverb, which used to belong to John Mayer. He also owns a bass amp that Alexander Dumble built for himself.
Photo by Jim Summaria
When it comes to “crossover” in country music, one thinks of Glen Campbell, Kenny Rogers, Garth Brooks, and Dolly Parton’s more commercial singles like “Two Doors Down.” Regarding the often polarizing subject and, indeed, what constitutes country music, it’s obvious that Urban has thought a lot—and probably been asked a lot—about the syndrome. The Speed of Now Part 1 blurs so many lines, it makes Shania Twain sound like Mother Maybelle Carter. Well, almost.
“I can’t speak for any other artists, but to me, it’s always organic,” he begins. “Anybody that’s ever seen me play live would notice that I cover a huge stylistic field of music, incorporating my influences, from country, Top 40, rock, pop, soft rock, bluegrass, real country. That’s how you get songs like ‘Kiss a Girl’—maybe more ’70s influence than anything else.”
“I think [Mark Knopfler] influenced a huge amount of my fingerpicking and melodic choices. I devoured those records more than any other guitar player.”
Citing ’50s producers Chet Atkins and Owen Bradley, who moved the genre from hillbilly to the more sophisticated countrypolitan, Keith argues, “In the history of country music, this is exactly the same as it has always been. Patsy Cline doing ‘Walking After Midnight’ or ‘Crazy’; it ain’t Bob Wills. It ain’t Hank Williams. It’s a new sound, drawing on pop elements. That’s the 1950s, and it has never changed. I’ve always seen country like a lung, that expands outwards because it embraces new sounds, new artists, new fusions, to find a bigger audience. Then it feels, ‘We’ve lost our way. Holy crap, I don’t even know who we are,’ and it shrinks back down again. Because a purist in the traditional sense comes along, whether it be Ricky Skaggs or Randy Travis. The only thing that I think has changed is there’s portals now for everything, which didn’t used to exist. There isn’t one central control area that would yell at everybody, ‘You’ve got to bring it back to the center.’ I don’t know that we have that center anymore.”
Stating his position regarding the current crop of talent, he reflects, “To someone who says, ‘That’s not country music,’ I always go, “‘It’s not your country music; it’s somebody else’s country music.’ I don’t believe anybody has a right to say something’s not anything. It’s been amazing watching this generation actually say, ‘Can we get back to a bit of purity? Can we get real guitars and real storytelling?’ So you’ve seen the explosion of Zach Bryan and Tyler Childers who are way purer than the previous generation of country music.”
Seen performing here in 2003, Urban is celebrated mostly for his songwriting, but is also an excellent guitarist.
Photo by Steve Trager/Frank White Photo Agency
As for the actual recording process, he notes, “This always shocks people, but ‘Chattahoochee’ by Alan Jackson is all drum machine. I write songs on acoustic guitar and drum machine, or drum machine and banjo. Of course, you go into the studio and replace that with a drummer. But my very first official single, in 1999, was ‘It’s a Love Thing,’ and it literally opens with a drum loop and an acoustic guitar riff. Then the drummer comes in. But the loop never goes away, and you hear it crystal clear. I haven’t changed much about that approach.”
On the road, Urban utilizes different electrics “almost always because of different pickups—single-coil, humbucker, P-90. And then one that’s tuned down a half-step for a few songs in half-keys. Tele, Strat, Les Paul, a couple of others for color. I’ve got a John Bolin guitar that I love—the feel of it. It’s a Tele design with just one PAF, one volume knob, no tone control. It’s very light, beautifully balanced—every string, every fret, all the way up the neck. It doesn’t have a lot of tonal character of its own, so it lets my fingers do the coloring. You can feel the fingerprints of Billy Gibbons on this guitar. It’s very Billy.”
“I looked at the stage and thought, ‘Whoa! I get it. You take all your influences and make your own thing. I’m gonna take all the things I love and find my way.’”
Addressing his role as the collector, “or acquirer,” as he says, some pieces have quite a history. “I haven’t gone out specifically thinking, ‘I’m missing this from the collection.’ I feel really lucky to have a couple of very special guitars. I got Waylon Jennings’ guitar in an auction. It was one he had all through the ’70s, wrapped in the leather and the whole thing. In the ’80s, he gave it to Reggie Young, who owned it for 25 years or so and eventually put it up for auction. My wife wanted to give it to me for my birthday. I was trying to bid on it, and she made sure that I couldn’t get registered! When it arrived, I discovered it’s a 1950 Broadcaster—which is insane. I had no idea. I just wanted it because I’m a massive Waylon fan, and I couldn’t bear the thought of that guitar disappearing overseas under somebody’s bed, when it should be played.
“I also have a 1951 Nocaster, which used to belong to Tom Keifer in Cinderella. It’s the best Telecaster I’ve ever played, hands down. It has the loudest, most ferocious pickup, and the wood is amazing.”
YouTube
Urban plays a Gibson SG here at the 2023 CMT Music Awards. Wait until the end to see him show off his shred abilities.
Other favorites include “a first-year Strat, ’54, that I love, and a ’58 goldtop. I also own a ’58 ’burst, but prefer the goldtop; it’s just a bit more spanky and lively. I feel abundantly blessed with the guitars I’ve been able to own and play. And I think every guitar should be played, literally. There’s no guitar that’s too precious to be played.”
Speaking of precious, there are also a few Dumble amps that elicit “oohs” and “aahs.” “Around 2008, John Mayer had a few of them, and he wanted to part with this particular Overdrive Special head. When he told me the price, I said, ‘That sounds ludicrous.’ He said, ‘How much is your most expensive guitar?’ It was three times the value of the amp. He said, ‘So that’s one guitar. What amp are you plugging all these expensive guitars into?’ I was like, ‘Sold. I guess when you look at it that way.’ It’s just glorious. It actually highlighted some limitations in some guitars I never noticed before.”
“It’s just glorious. It actually highlighted some limitations in some guitars I never noticed before.”
Keith also developed a relationship with the late Alexander Dumble. “We emailed back and forth, a lot of just life stuff and the beautifully eccentric stuff he was known for. His vocabulary was as interesting as his tubes and harmonic understanding. My one regret is that he invited me out to the ranch many times, and I was never able to go. Right now, my main amp is an Overdrive Reverb that also used to belong to John when he was doing the John Mayer Trio. I got it years later. And I have an Odyssey, which was Alexander’s personal bass amp that he built for himself. I sent all the details to him, and he said, ‘Yeah, that’s my amp.’”
The gearhead in Keith doesn’t even mind minutiae like picks and strings. “I’ve never held picks with the pointy bit hitting the string. I have custom picks that D’Addario makes for me. They have little grippy ridges like on Dunlops and Hercos, but I have that section just placed in one corner. I can use a little bit of it on the string, or I can flip it over. During the pandemic, I decided to go down a couple of string gauges. I was getting comfortable on .009s, and I thought, ‘Great. I’ve lightened up my playing.’ Then the very first gig, I was bending the crap out of them. So I went to .010s, except for a couple of guitars that are .011s.”
As with his best albums, High is song-oriented; thus, solos are short and economical. “Growing up, I listened to songs where the guitar was just in support of that song,” he reasons. “If the song needs a two-bar break, and then you want to hear the next vocal section, that’s what it needs. If it sounds like it needs a longer guitar section, then that’s what it needs. There’s even a track called ‘Love Is Hard’ that doesn’t have any solo. It’s the first thing I’ve ever recorded in my life where I literally don’t play one instrument. Eren Cannata co-wrote it [with Shane McAnally and Justin Tranter], and I really loved the demo with him playing all the instruments. I loved it so much I just went with his acoustic guitar. I’m that much in service of the song.”
In general, Leo Fender’s credo was that “the design of each element should be thought out in order to be easy to make and easy to repair.” His approach was to build high-quality instruments while maintaining low manufacturing costs with mass production. When thinking about the design of the Stratocaster, there are at least two elements where one can have some doubts about the easy-to-repair approach, at least from today’s perspective: pickguards you can’t take off without removing the strings and truss rods you can’t access without removing the pickguard.
Within the historical context of Leo Fender’s time, I think he would say that he did everything right. Right from the start, the Fender company cared a lot about setting up their guitars before they were shipped out. The setup was meant to be set-it-and-forget-it, so truss rod access was not very important—accessing it from the neck heel was the design following function.
I’m not sure if this was really easier to build this way compared to accessing it from the headstock, but it was the method that offered better headstock stability and longevity. Nine out of 10 Stratocaster headstock repairs I see in the shop are guitars with truss-rod access from the headstock. Because of its design, this is a weak spot in the wood, so drilling a hole to access the truss rod will weaken it more. In old Fender papers I found an interesting bulletin that the neck was never meant to be repaired or refretted. Instead, a customer was simply meant to change the complete bolt-on neck.
Back in the ’50s, things like replacement pickups, mods, push-pull pots, multi-stage pickup switches, and the like were not yet invented, so there was no need to design the Stratocaster pickguard for easy access. It would only have to be removed for a serious repair, which shouldn’t have happened very often.
Times have changed noticeably, and today it is usual to perform a setup regularly to compensate for changing weather conditions, different string gauges, and so on. And trying new pickups, tone caps, mods, etc. is a kind of popular sport among most guitarists—set-it-and-forget-it was forgotten long ago!
“Back in the ’50s, things like replacement pickups, mods, push-pull pots, multi-stage pickup switches, and the like were not yet invented, so there was no need to design the Stratocaster pickguard for easy access.”
The design of the Stratocaster hasn’t changed much since the mid ’50s. Of course, standard procedure is now to have truss-rod access from the headstock, so at least the setup thing is finally solved. But Stratocasters with access to the pickguard from behind is something that would make a lot of things much simpler. Let’s see what can be done to make things easier and, of course, faster when you do have to remove your guitar’s neck or loosen the strings to get to the pickguard.
The gold standard way of servicing a Stratocaster is to remove the old strings so you have full access to the pickguard. This is especially perfect when you want to do some work under the hood of the pickguard like changing a pot, pickup, or any other electronics work. You can test everything before you put on the new strings and there is no additional work to consider. For setups this is a great starting point—you can roughly pre-adjust the neck to your preferences, but for the final setup, there is no way around putting on the new set of strings. Here are two of my favorite hacks in the shop to save some time and nerves.
The IKEA Hack
You all know these plastic kitchen sealing clips for resealing opened bags and packages. I like the IKEA model because they’re super sturdy, well-made, and will last a very long time. Take one of these clips—we will need the large version—open it, and cut six small grooves in it using a round needle file or any other similar tool for this. Try to come close to the string spacing behind the nut with your grooves. I usually take a black sharpie to mark the spacing on the plastic clip before using the file.
Photo courtesy of SINGLECOIL
After you’re finished, loosen the strings but don’t take them out of the tuner posts. Slide the opened clip under the strings behind the nut, put each string in one of the grooves, and close the clip. Now, you can pull the strings out of their posts and put them aside to have full access to the pickguard and the neck-heel truss rod. Because the modified clip will hold the strings in place, they will not tangle up into a bird’s nest of strings. For vintage-Kluson-style tuners or locking tuners, it can be very easy to pull the strings out of the posts and back in. For other types, you’ll need a little bit more patience to get the strings back in place, but it’s worth the effort.
The Old-Style Capo Hack
My first capo that I got when I was around 10 years old or so is still alive and employed in my shop. It’s a Dunlop 11C toggle-action capo that is still in production, and I bet a lot of you started with this capo, too. I use the curved version that my parents bought by accident for my classical guitar because they didn’t know about flat and curved fretboards. This one works great on all electric guitars.
Photo courtesy of SINGLECOIL
Loosen all the strings slightly so they will not slip out of their posts. Put the capo on the first fret and close it. The strings can no longer slip out of the nut, the string trees, and the posts of the tuners.
Photo courtesy of SINGLECOIL
Now, when you remove the neck, the capo will hold the strings in place. Putting the neck back on will be very easy: Fasten the screws, take off the capo, and tune the strings to pitch.
You see, there are at least two alternative ways to avoid changing the strings, especially if they are as good as new with only a few playing hours upon them. Often, little gizmos make a big difference.
Next month we will dive down into Epiphone history and see what they electronically cooked up in the mid ’60s, so stay tuned.
Until then ... keep modding!
Illustration courtesy Singlecoil
Let’s have a deep look into what can be done to get rid of single-coil hum, which can be very annoying, especially when playing live. I’m sure you all know the situation: Your band managed to get an important Friday night gig at, let’s say, Bob’s Country Bunker. You and your bandmates arrive in time to set up your equipment, naturally with everything plugged into the same circuit as Bob’s popcorn machine, dishwasher, and sandwich maker. You plug in your Strat, turn up your amp, and there’s a loud humming noise coming out of it.
A single-coil pickup has one coil with six magnet rods and two bobbins holding everything together. It not only picks up the strings, but also all kinds of external magnetic fields generated by transformers and other electromagnetic devices. But when two coils are wound in opposite directions and are working together, the hum will get canceled. This is an old principle dating back to the beginning of the 20th century, and it’s how a humbucker pickup works. In the past, guitarists had to struggle with radio stations, fluorescent tubes, transformers, and the like; today, it’s more digital fallout and, of course, digital power supplies of all kinds.
The pickup industry created all kinds of hum-canceling pickups in single-coil shape, most commonly stacked and double-rail-style pickups. So, a humbucker pickup can be the ticket out of such unpleasant live situations. But all of these options generate a different magnetic field compared to a single-coil pickup, resulting in a different tone. The resonant frequency is shifted downwards a little bit because the ohmic resistance and inductance of the two coils are added together. The tone gets milder and warmer, with more midrange—you all know this tone. Splitting such a humbucker will sound more single-coil-like, but it will pick up hum again. Connecting both coils in parallel rather than in series will also sound more single-coil-like and is hum-canceling, but it’s not a real single-coil tone.
Using a reverse wound, reverse polarity (RWRP) pickup such as a Strat’s middle pickup will get you at least two hum-free switching positions (bridge+middle and neck+middle), but even this sounds different. Going active is another way to fight humming noises, and these special pickups sound more or less like a real single-coil, too.
But what if you don’t want to compromise? Is pure single-coil tone with no hum possible? Yes and no! It is possible to come close, but one day, a digital gremlin may find a way to annoy you to a certain degree. And there are extreme situations where only a humbucker will work.
One step in the right direction is shielding the pickups and cavity of your guitar. Shielding the compartment of a guitar the right way is a challenge on its own, and I will cover this in a future installment of this column. But even if all the shielding is done the right way, the sound of the pickup will be altered to a certain degree, which is the nature of the beast. And the shielding is always there, so you can’t switch between pure single-coil and shielded single-coil tone.
So, what about switchable hum-canceling for your guitar? This way you could have both: pure single-coil tone and hum-free operation when needed. And if this could not only be made switchable but also controllable, you could balance your tone between the two.
Here is a solution based on principles from Bill Lawrence, which my dear friend Bernd C. Meiser from the BSM company has refined in order to make it more controllable: a variable dummy coil.
“But what if you don’t want to compromise? Is pure single-coil tone with no hum possible? Yes and no!”
In simple terms, a dummy coil is an additional pickup that is identical to the other pickups but without magnets. It has a phase, but no polarity. A dummy coil accepts the electric signal created by the magnetic single-coil pickup and reverses it, which will remove a large portion of the hum. In the process, a very small amount of the treble signal is lost as well. However, this treble loss is far less compared to stacked or dual-rail humbuckers.
The specs of the dummy coil need to be close to the pickup you are complementing. So, any universal dummy coils advertised to work with all single-coil pickups will only work to a certain degree but not perfectly. Instead, it’s best if you order a dummy coil that matches your pickup. The company who made your pickup will know the formula, and a dummy coil from them will be super effective. If that pickup is from a larger manufacturer, you’ll need to find out specific parameters—wire gauge, wire type, number of turns—so a custom pickup company can make a matching dummy coil for you.
The simplest way to set up a dummy coil would be to connect it permanently, so it’s 100 percent active all the time. For more flexibility, you can add a switch to turn the dummy coil on and off. But the most flexible way is to use a pot to control the dummy coil, so you can dial in pure single-coil tone, 100 percent dummy-coil hum-removing, and everything in between—in other words, so you can balance tone and hum-free-ness depending on the certain playing situation.
To do so, connect a 0.01 uF capacitor in parallel to the dummy coil. The high-end frequencies will no longer pass the dummy coil and its inductance; they will be drained low-resistance to ground. For the bass frequencies, the capacitor is still high-resistance so the dummy coil is active. This way you will have humbucking functionality for the bass frequencies, but pure single-coil tone in the high frequencies—what a perfect and clever solution from Bill Lawrence. If you now connect the capacitor and the dummy coil to a pot, you have a controllable dummy coil as described above.
You can experiment with the capacitor value for fine-tuning your system; 0.01 μF is a pretty good value to start. With a smaller cap, you shift the humbucking effect toward the high frequencies and vice versa. A smaller cap means more overall humbucking (bass and highs) and a larger cap means less overall humbucking, with the high and middle frequencies staying untouched.
A Stratocaster is perfect for this mod because it has two tone controls. One will be converted to a Telecaster-style master tone control, while the other will become the new dummy-coil controller.
For a Stratocaster with three vintage flavored single-coil pickups, I recommend the following pot configuration (all audio taper): 250k volume, 500k tone, 500k dummy-coil controller. This way, in humbucking mode, the two coils are connected in series rather than in parallel, so the resonance peak will be dampened. The two 500k pots will help compensate for this. The 250k volume is always the way to go in a passive guitar system to ensure the best and most even control. The 500k tone pot can be a little bit over the top in pure single-coil mode, but simply roll it down a little and you are in the 250k ballpark—problem solved!
Here we go for the wiring. It’s not hard to do and mostly uses the parts that are already there:
Illustration courtesy Singlecoil
That’s it! Next month, we will talk about some alternative ways to service a Stratocaster that can be real time savers, so stay tuned.
Until then ... keep on modding!
I think it’s fair to say that the Fender Marauder, like Gibson’s Moderne, was ahead of its time, and neither guitar made it beyond the prototype stage—at least not as originally designed.
The Marauder’s ’60s production model came with three pickups in a Jaguar-style body, many rocker switches, German carve headstock, and some even with slanted frets. It was later offered as part of the Modern Player series as well as through the custom shop. But the original design and concept of the Marauder was quite different.
In order to see what Leo Fender cooked up in the mid ’60s, we will have to take a short journey back in time, firing up the flux capacitor in our DeLorean with 1.21 gigawatts of energy. Our destination is the Fender factory in California, somewhere between 1963 and 1964—the early beginnings of the space age. The United States worked on the Apollo program at the same time the former Soviet Union worked on the Luna program on the other end of the world. Europe was busy developing and building the Concorde, and Leo Fender, sitting on the porch of his home in Orange County, was ready for his next stroke of genius.
Today, “less is more” is a common approach, not only in the guitar industry. But back then, it was “more is more” and “the more, the merrier.” Leo Fender offered the Esquire with one bridge pickup, and the two-pickup Esquire/Telecaster followed soon after. The next step was the Stratocaster with three pickups, which was mostly influenced by Bill Carson, one of Leo’s favorite guitarist guinea pigs in the ’50s. The next logical step was a guitar with four pickups, and that was exactly the idea behind the Marauder project. There are other guitars with four pickups, like the Japanese-made Teisco/Kawai EG-4T (nicknamed the “Hertiecaster”), or the Italian-made Welson Kinton, Galanti Grand Prix V4, and Eko 500/4V. But Leo Fender went the extra mile with his Marauder concept and installed the pickups underneath the pickguard for a very sleek aesthetic.
“The next logical step was a guitar with four pickups.”
Let’s have a look under the hood: The patent for the Marauder was filed March 6, 1964, and granted December 6, 1966—US patent #3290424—so we can say that developing and prototyping probably started somewhere in 1963. In addition to the four pickups under the pickguard, the original Marauder had a 3-way switch for each of the pickups, plus a Telecaster-style master volume/master tone configuration. On the patent, you can clearly see that the guitar was planned as an offset-type like the Jazzmaster or Jaguar using the same hardware.
There was, however, a one-off prototype built around a Stratocaster that has a dedicated 3-way lever pickup selector switch from the Telecaster and Stratocaster (the 5-way switch was not yet invented then) for each pickup, which looks really weird.
The Pickups
The pickups in the Marauder were designed by a man named Quilla “Porky” Freeman, a Western-swing musician and tinkerer based in Missouri. These large, slightly offset experimental pickups featured a dozen pole pieces and deep armatures, which helped give it a percussive tone. To compensate for the distance from the strings, the pickups were overwound. The patent document clearly states that all four pickups had the same winding direction (phase), but different magnetic polarity. The first (bridge) and the third pickup had south polarity, while the second and fourth (neck) pickup had north polarity, which was a clever move. This was the start of what is known as a “stealth pickup” today, often used as the hidden neck pickup on an Esquire. For such a construction, it’s important that the pickguard material is non-magnetic.
The Switching Matrix
Each of the pickups is connected to its own 3-way on-off-on switch, allowing the corresponding pickup to be on, off, or on with reversed phase, resulting in a total of 48 different sounds between the four. If the idea of these 3-way pickup selector switches sounds familiar, that’s because this is the basic design of Brian May’s “Red Special” guitar that he built with his father Harold in 1963. While that’s the same time frame, it’s close to impossible that Leo Fender knew what Brian May was doing in the U.K., so two geniuses simply had the same idea at the same time.
Here we go with the wiring: The four toggle switches are double-pole on-off-on types, volume and tone are 250k audio, and the tone cap is a 0.05 uF type. To keep the diagram clean, I substituted all ground connections with the international symbol for ground.
Illustration courtesy of Singlecoil
That’s it! Next month, we will talk about a very cool and clever way to integrate a variable dummy-coil into a guitar, so stay tuned.
Until then… keep on modding!