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Mojave Dirty Boy User Manual

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WARNING: Please read ALL the safety and other instructions contained
inside this User Manual BEFORE your first use of the product. Failure to
do so may result in serious personal injury or death and/or permanent
damage to the product. Keep these instructions for future reference.
The lightning flash with arrowhead symbol, within an equilateral triangle, is
intended to alert the user to presence of uninsulated "dangerous voltage"
within the product's enclosure that may be of sufficient magnitude to
constitute a risk of electric to persons.
The exclamation point, within an equilateral triangle, is intended to alert the
user to the presence of important operation maintenance (servicing)
instruction in literature accompanying the appliance.
WARNING
: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT
REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING
: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,
DO NOT EXPOSE THE APPLIANCE TO RAIN OR MOISTURE.
NOTICE
Operation is subject to the following two conditions: (1) This device may not
:
cause harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Dirty Boy User Manual

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Summary of Contents for Mojave Dirty Boy

  • Page 1 Dirty Boy User Manual WARNING: Please read ALL the safety and other instructions contained inside this User Manual BEFORE your first use of the product. Failure to do so may result in serious personal injury or death and/or permanent damage to the product. Keep these instructions for future reference.

  • Page 2: Section 1: Powering Up The Dirty Boy

    Dirty Boy User Manual Thank you for your purchase of the Dirty Boy, handcrafted by Mojave Ampworks LLC. Your new Dirty Boy amp comes with the following: Power Cord Owners Manual Registration information Boost on/off Pedal (Optional) Boost Pedal Cable (Optional) Overview: We are very pleased to offer the Dirty Boy for your musical enjoyment.
  • Page 3 Dirty Boy User Manual successive pre-amp tube is installed in the corresponding socket moving from right to left (i.e., V2 in the 2 socket, V3 in the 3 socket, etc.) Step 4: Once all the pre-amp tubes are installed, install a metal cap over each of the preamp tubes.

  • Page 4: Section 2: Operating The Dirty Boy

    Dirty Boy User Manual 4. Turning the Dirty Boy ON: Once the Variac and the Bias controls are set to “0” and COLD, move the power switch on the front of your Dirty Boy to the “ON” position. Allow at least sixty (60) seconds for warm up, which is the minimum recommended.
  • Page 5 Dirty Boy User Manual should be kept in mind as the Variac does not provide power to any part of the amplifier other then the power section of the amplifier. The heaters for all the tubes, including the power tubes, are all provided on an auxiliary basis. This means you do not have to worry about under powered heater voltage on your tubes in the Dirty Boy.
  • Page 6 Dirty Boy User Manual the “cut off” state of the power tubes. You are going to hear a “gating” effect. I would invite you to experiment with this feature. If you set the guitar volume and boost to the levels necessary, you will literally blow through this “cut off” state and get a full blown power tube distortion.

  • Page 7: Section 3: Dirty Boy Amp's Features And Functions

    Dirty Boy User Manual SECTION 3: Dirty Boy Amp’s Features and Functions. 1. Variac Dial Control. This controls the power level of the overall amp. When the Variac control is set to 100%, the power amp section of the amp is able to produce 100 watts of power.
  • Page 8 Dirty Boy User Manual and music as well as instrument signal. When the feedback control is set to minimum, the amp will behave with a stronger degree of punch and brightness. When the Feedback control is set to maximum, the amp will be dampened down to allow a better clarity and less aggressive tone.

  • Page 9: Section 4. Using Guitars And Pedals With The Dirty Boy

    Dirty Boy User Manual connection at one time. If using a set of cabinets, the two cabinets will plug to the output jacks but will equal only 1/2 of the impedance of either one cab. For example, two 16 ohm cabinets will equal 8 ohms if plugged into both speaker output jacks. This is known as parallel.

  • Page 10: Section 6. Warranty And Registration Information

    Tubes are excluded form parts warranty and are only good for 30 days after date of purchase. All repairs must be performed by the manufacture only. Mojave Ampworks does not authorize any service work nor will Mojave Ampworks offer reimbursement for service work performed by outside facilities.

  • Page 11: Section 7: Frequently Asked Questions

    Dirty Boy User Manual SECTION 7: Frequently Asked Questions. 1. Can I change the power tubes to another type or brand? No, if the power tubes are changed they will need to be re biased. Biasing procedure for the Dirty Boy is unique since this amp is run on a variac and there is a user adjustable bias control on the front.

  • Page 12: Section 8: Quick Start Amp Settings

    Dirty Boy User Manual SECTION 8: Quick Start Amp Settings: Clean Tone: • Variac 82% • Boost off • Guitar Volume 30% • Treble 80% • Midrange 57.5% • Bass 67.5% • Presence 85% • Feedback 50% • Bias 65% •...
  • Page 13 Dirty Boy User Manual Tone Type: Hair Pick (Chewing On Crayons) • Variac setting: 70% • Boost Gain:87.5% • Deep On/Off: On • Boost On/Off: On • Boost Volume: 94% • Guitar Volume:100% • Treble:75% • Midrange: 35% • Bass 0% •...
  • Page 14 Dirty Boy User Manual Guitar: Mahogany Strat with Floyd Rose Bridge 7 Tom Holmes 455 Bridge Pick Up Tone Type: VHII Beautiful Girls • Variac setting: 74% • Boost Gain: 65% • Deep On/Off: Off • Boost Volume: 100% • Boost On/Off: On •...
  • Page 15 Dirty Boy User Manual Guitar: Carvin SH 550 Semi Hollow Stock Pickups (Single Coil tap selected) SYTF Tone Type: Clean with good articulation, slightly bright but still balanced. • Variac setting:100% • Boost Gain: 0% • Deep On/Off: Off • Boost Volume: 0% •...

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