Note: This article has been updated with lastest available information on July 26th, 2021 at 06:50 pm
Positive Grid Tremolo pedal is available under the Mod effect group and is inspired by Mad Professor Mellow Yellow Tremolo pedal.
Mad Professor Amps says:
Mad Professor Mellow Yellow Tremolo (MYT) is a true sine wave tremolo effect designed for tremolo tones from the of 50′s type soft swing to deep modulation with great playability, regardless of tremolo depth or speed.
The strength of the incoming signal is modulated by a sinusoidal oscillator, just like in the early amps, and modulation bias is set to give symmetrical modulation. This gives a very musical tremolo effect that blend very well with both clean and distorted guitar tones.
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| Type | Limited Liability Company |
|---|---|
| Industry | Guitar Effects Pedals |
| Founded | 2000 |
| Founder | Björn Juhl |
| Headquarters | , |
| Website | http://www.one-control.com |
BJFE Guitar Effects is a company which manufactures effects pedals for use with instruments such as an electric guitar. These pedals are commonly used by guitarists to modify the sound of their guitar before it reaches the amp. The company is located in Sweden, and was founded in 2000 by Björn Juhl. "BJFE" stands for Björn Juhl Förstärkarelektronik (which is Swedish for Björn Juhl Amplifier Electronics). Pedal types include distortion, overdrive, "vibe" (vibrato), compression, and equalization (EQ). Due to the limited production and handbuilt nature, these pedals are considered "boutique" guitar effects.
BJFE pedals are all handmade by BJ and his wife Eva Juhl paints the lettering and pictures. BJFE pedals typically follow a "color" naming scheme, and an adjective to describe the sound. See below for examples. Custom shop models are usually painted by Donner Rusk (aka "Donnerbox") in the USA.
BJFE drive pedals designs also tend to lend themselves well to "stacking", or cascading several pedals in successive order. Björn has written a guide on this here.[1] Also, the drive pedals typically are dynamic in nature- showing different EQ or distortion depth as the input guitar level changes. For example, the Honeybee overdrive may sound nearly clean with guitar volume at the lower range, but gritty and overdriven with the guitar volume at its maximum setting.
Founder history
Björn Juhl began creating models for production sale upon founding the company in 2000. However, he began building effects units for guitar as early as 1981. In 2000 Björn was displaying his repair skills at a guitar trade show, and made three pedals to demonstrate his skills. Here he teamed up with Harri Koski from Custom Sounds in Stockholm, to begin a partnership distributing guitar effects which Björn designed to a worldwide customer base.[2]
Björn Juhl has two kids, a daughter and a non binary child named Martina. His daughters name is Marlene and music is a big pleasure for her. She is going in her father's footsteps.
BJF Electronics initially started in June 1999 as an amp repair business. Björn repaired all kinds of things from a Tubon (a kind of early synthesiser used as an electric bass by pop bands who couldn't afford a Fender Bass or a Hagstrom Bass), to a Music Man amp that had been used to test how to take the live and neutral currents out of a three phase connection. Björn handled the extreme and difficult cases that other repairmen wouldn't touch because they thought they'd take too much time or were considered hopeless repair opportunities.[3]
Construction and philosophy
BJFE pedals are enclosed in a 110x60x30mm chassis, in an ELFA K-430 enclosure for most pedals. The circuit boards are wrapped in neoprene, which is a kind of rubber used in diving suits. The neoprene is capable of withstanding heat, water, and other fluids and it cushions the electronic components inside. The circuit board is also sealed to preserve trade secrets.
The first BJFE pedals were painted in nitrocellulose—beginning in 2002 the pedals are handpainted in oil. Oil is much more durable, and ages well.[3] Björn Juhl states that the colors are chosen to provide a pleasant palette. Each model comes with unique artwork inside the back pedal cover, painted by hand.
Models
Current models listed here, along with a description. A more full description of all the BJFE pedals complete with their history can be found on the BJFE Pedal Descriptions[4] independently maintained by David Cittadini on the thread Archived 2011-07-25 at the Wayback Machine on the BJFE Forum.
Fuzz
- Candy Apple Fuzz
- A crude fuzz, with octave function if needed and dying moans of gated fuzz[5]
- Pink Purple Fuzz
- A more tame fuzz. Here, the fuzz knobs act differently - The first half of rotation will give dynamic fuzz, suitable for overdrive, and second half will give compressed fuzz effects with most guitars.[6]
Distortion and overdrive
BJFE overdrive pedals add a "touch sensitivity" to the distortion in most cases- picking lightly or slight reductione in the volume knob position reduce the distortion.
- Honeybee Overdrive
- The most dynamic, touch sensitive pedal from BJFE. According to Björn, this pedal fits most styles and "stacks" well with most other pedals. On a clean-sounding amp HB can be used to get distortion on forceful notes as controlled by picking force. This can be used on guitars with flatwound strings for a mellow jazz sound or roundwound strings for a vintage style light distortion. In pedal systems with multiple drive pedals, HB can be connected last to soften the response and even give a low mid-range hump to bright amplifiers and provide a ceiling-effect for the upper treble frequencies.[7]
- Dyna Red Distortion
- Distortion ranges from very light to heavy. It is used mostly for high gain sounds but it also matches particularly well for light "break up" tone with some amps. The "drive" knob on this pedal controls the amount of distortion and sustain. Lower settings give uniform distortion patterns which will be input amplitude sensitive (i.e. the unit distorts more the harder you strike the strings). There is no definite clipping point - but rather different shades of distortion as amplitude changes. Higher settings give more compression and less touch sensitive response, and at maximum output will be heavily compressed while still retaining clarity and increasing sustain.[8]
- Emerald Green Distortion Machine
- Modeled after a VOX AC-15 Twin 10 amp. EGDM gives a range of distorted sounds that are a bit less aggressive than the Dyna Red Distortion and also more compressed. The distortion depth is a bit less than the Dyna Red Distortion as well. This is done by use of a specific amplifier overload function and a slight ’ducking’ effect which can be noticed with high input levels. A specific equalizer curve is also used to complement this tone.[9]
Research Models
- Model H (available through the BJFE Custom Shop)
- Sparkling Yellow Overdrive (available through the BJFE Custom Shop)
Compressor Pedals
- Pine Green Compressor
- Subtle compression pedal. This was originally designed for a set of Beatles songs Björn's band was playing in, to give the kind of clean sound needed from the amp he was using. It works equally well with single coil, P90, and humbucking guitars It was introduced as a model since Andreas of Custom Sounds Stockholm found Björn's old unit on one of the shelves at his store and asked to borrow it.[2]
EQ Pedals
- Sea Blue EQ
- EQ in pedal form, designed to match the piezo-acoustic guitars and work as a booster addressing frequency bands with treble and bass controls that you don't find on your amp. As a result the pedal allows you to further EQ beyond what your amp provides, while not fighting its own EQ.
Modulation Pedals
- Mighty Green Minivibe
- Designed to work primarily before distortion, and gives a traditional vibe sound. This pedal does not have Univibe type sounds, but more vibrato.
Boost Pedals
- Baby Pink Booster
- Volume boost pedal. This is a booster pedal intended to use between a low-level instrument such as electric guitar and an amplifier. It’s intended to place in signal chain after overdrive pedals in order to boost level rather than distortion - hence its gain of 18dB (or 8 times). You can of course use it in front of an overdrive to boost the gain for more distortion.[10]
Relationship to Mad Professor Amplification
Björn was asked by his BJFE pedal distributor, Harri Koski, to consider designing amplifiers. Björn was fairly busy building and designing pedals for the BJFE line, and did not have the time to also build amplifiers. It was suggested a new company be created where Björn could design the effects and amplifiers, but they would be constructed and distributed under the name Mad Professor Amplification. These are pedals and amplifiers designed by Björn but not hand built by him.
References
- ^ "BJFE Guitar Effects Community • PedalStackers Guide Original Article and Stack Suggestions". Bjfe.org. Retrieved 2010-06-19.
- ^ a b "BJF Electronics Interview | Boutique Guitar Effects". Sixstringsoul.com. 2005-02-01. Archived from the original on 21 July 2010. Retrieved 2010-06-19.
- ^ a b The Effector Magazine, Japan Dec 2009
- ^ BJFE Pedal Descriptions
- ^ "Archived copy" (PDF). Archived from the original (PDF) on 2011-07-14. Retrieved 2010-05-21.
{{cite web}}: CS1 maint: archived copy as title (link) - ^ "Archived copy" (PDF). Archived from the original (PDF) on 2011-07-14. Retrieved 2010-05-21.
{{cite web}}: CS1 maint: archived copy as title (link) - ^ "Baby Blue O.D. Owner's Manual" (PDF). Archived from the original (PDF) on 2011-07-14. Retrieved 2010-06-19.
- ^ "Dyna Red Distortion Owner's Manual" (PDF). Archived from the original (PDF) on 2011-07-14. Retrieved 2010-06-19.
- ^ "Baby Blue O.D. Owner's Manual" (PDF). Archived from the original (PDF) on 2011-07-14. Retrieved 2010-06-19.
- ^ "Archived copy" (PDF). Archived from the original (PDF) on 2011-07-14. Retrieved 2010-05-21.
{{cite web}}: CS1 maint: archived copy as title (link)
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