About the Tweed Deluxe Style Amp

Transcription

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2 About the Tweed Deluxe Style Amp THE MOJO TWEED DELUXE STYLE AMP IS BASED ON THE CLASSIC E CIRCUIT FROM THE 90S, AND IS BY FAR ONE OF THE MOST POPULAR AMP CIRCUITS IN HISTORY. These amps were originally designed as medium power amps that would allow a musician to plug in more than one amplified instrument at a time. At higher volumes, this amp produces saturated tones that were adopted as signature sounds for the likes of Billy Gibbons, Neil Young, Don Felder, and Larry Carlton. new range of tonal options. The global tone control also helps shape the overall timbre of the amp, giving the player total control over their sound without having to spend hours dialing in EQs. The Mojotone amp kit is designed to give you the joy of building a quality amp that will look, sound, and feel of legends. Utilizing two power tubes, one AY preamp tube, and one AX preamp tube, the circuit is simple enough to maintain a rich harmonic composition but powerful enough for guitarists to use in recording studios, rehearsals, and smaller venues and the amp is just a microphone away from being ready for bigger stages. We chose a Jensen CQ Watt speaker to complement the E style circuit, as it enhances the sound of the amp without compromising its historic tonal accuracy. Our Tweed Deluxe style amp has two normal channel inputs and two bright channel inputs. The normal and bright channels each have their own volume control, and the two channels can even be jumpered together and blended for a LET S BUILD! ---->

3 CONTENTS SECTION : SAFETY PG. SECTION : TOOLS PG. SECTION : PARTS INVENTORY PG. SECTION : COMPONENT IDENTITY & ORIENTATION PG. SECTION : CHASSIS PREPARATION PG. SECTION : TRANSFORMER WIRING PG. SECTION : BOARD ASSEMBLY PG.0 SECTION : BOARD INSTALLATION INTO CHASSIS PG. SECTION 9: WIRING THE SOCETS, JACS & POTS PG. SECTION 0: INITIAL CHASSIS TESTING PG. SECTION : CAB PREP & SPEAER INSTALLATION PG. SECTION : CHASSIS INSTALLATION PG. SECTION : SOUND TEST PG. SECTION : TROUBLESHOOTING PG. MORE FROM MOJO PG. Copyright 0 MojoTone, LLC All content included in this book including text, graphics and images is the property of MojoTone, LLC and protected by U.S. and international copyright laws. The collection, arrangement and assembly of all content in this book is the exclusive property of MojoTone, LLC and protected by U.S. and international copyright laws. You may not copy, reproduce, distribute, publish, display, perform, modify, create derivative works, transmit, or in any other way exploit any part of copyrighted material without permission from MojoTone, LLC.

4 SECTION : SAFETY SAFETY FIRST! ELECTRONICS CAN BE DANGEROUS AND MUST BE TREATED WITH RESPECT. ANY CIRCUIT THAT WORS WITH 0 VAC POWER FROM AN ELECTRICAL OUTLET IS ESPECIALLY DANGEROUS AND COULD POTENTIALLY ILL YOU. HERE ARE SOME SAFETY GUIDELINES TO EEP YOU SAFE AS YOU WOR: Never work on a circuit while power is applied. Do not connect power to a circuit until the circuit is finished and you have carefully checked your work (twice). If you smell anything burning, immediately disconnect the power and examine your circuit to find out what went wrong. eep your work area dry and organized. Be careful around large capacitors; they can continue to hold voltage long after they are disconnected from power. Discharge electrolytic capacitors if power has been applied to the unit. Be especially careful when you solder. A hot soldering iron can easily burn you. Always work in a well-ventilated space. Have safety equipment such as a fire extinguisher, a first-aid kit and a phone nearby. Be Patient! Rushing through any type of technical work just leads to frustration and compounds issues that can easily be avoided. SECTION : Tools CERTAIN TOOLS ARE REQUIRED TO SUCCESSFULLY BUILD YOUR AMP. THE FOLLOWING TOOLS ARE RECOMMENDED TO COMPLETE YOUR PROJECT: ½ Nut Driver Set of needle nose pliers (one with no grip and one with serrated edge) Wire Cutters Wire Strippers Soldering Iron & Solder Adjustable Wrench Phillips Head Screwdriver Drill with / drill bit and / drill bit Sharpie Marker Ruler Multimeter Lots of patience NEED A TOOL? DO YOU SEE SOMETHING ON THIS LIST THAT YOU DON T HAVE? TURN TO PAGE FOR A FULL LIST OF TOOLS, PARTS AND ITS TO ADD TO YOUR WOR BENCH.

5 SECTION : PARTS INVENTORY *optional based on order AX () Chrome ChassisY AX () Solid Pine Cabinet* () 0'' Install Power Cord () '' Jensen CQ Speaker* () MOJO Power Transformer () MOJO Output Transformer () Eyelet Board & Backer Board () Octal Tube Socket & Tension Clamp () 9-Pin Tube Socket & Tube Shield w/ hardware () () () Vacuum Tubes* () () Chicken Head nob () A Potentiometer w/ hardware () JA /'' Shorting Jack w/ hardware () Fuse Holder & amp Fuse () J /'' Mono Jack w/ hardware w/ hardware BUILD. MODIFY. REPAIR. () Ground Switch w/ hardware () Power Switch w/ hardware

6 () Pilot Light () Three-Lug Ground () Indicator Lamp Assembly w/ hardware () Jewel Lens () Right Angle /'' Plug () Rubber Grommets RESISTORS CAPACITORS HARDWARE () 0Ω Ceramic () w.k Metal Oxide ().w 0k Carbon Comp. ().w 0Ω Carbon Comp. ().w k Carbon Comp. ().w m Carbon Comp. () 00v Silver Mica 00v Orange Drop 00v Orange Drop 00v Orange Drop () -0 / '' Screw & ep Nuts () - / Screw & ep Nuts () -0 / Screw & ep Nuts () - / Screw & ep Nuts () 0- / Screw & ep Nuts ().w k Carbon Comp. ().w.k Carbon Comp. () 0. 00v Orange Drop WIRES gauge Yellow Pre-Tinned ().w 00Ω Carbon Comp. ().w k Carbon Comp. ().w 00k Carbon Comp. SECTION : COMPONENT IDENTITY & ORIENTATION ENSURE ALL POLARIZED CAPS ARE IN THE CORRECT ORIENTATION WHEN INSTALLING ONTO THE BOARD. THIS IS TYPICALLY DENOTED BY AN ARROW POINTING TOWARDS THE NEG- ATIVE SIDE, OR A SMALL INDENTION ON THE POSITIVE SIDE. SAFETY FIRST! A CAP IN THE WRONG ORIENTATION CAN EXPLODE! SO FOLLOW YOUR SCHEMATIC AND WIRING DIAGRAM AND PAY CLOSE ATTENTION WHEN ORIENTING YOUR POLARIZED CAPS. POLARIZED () v Electrolytic () 0v Sprague Atom NON-POLARIZED gauge Green Pre-Tinned gauge Black Stranded gauge White Stranded

7 SECTION : Chassis preparation PLEASE NOTE: ALL PARTS LISTED IN THE CHASSIS PREP SECTION STARTS AT ONE END OF THE CHASSIS AND COMPLETES ON THE OPPOSITE END, BOTH TOP AND BOTTOM. FLATTENED VIEW OF INSIDE OF CHASSIS FUSE HOLDER INDICATOR LAMP VOLUME VOLUME POWER SWITCH POTENTIOMETERS INPUT JACS GROUND LUGS RUBBER GROMMETS POWER TRANSFORMER SPEAER JACS 9 9 Y AX AY OCTAL TUBE SOCETS Mount the power transformer using its preassembled hardware and your adjustable wrench. The transformer will be recessed through the rectangular cutout in the belly of the chassis. 9-PIN TUBE SOCETS (MOJO) or Yellow, Black, Green and Orange (MOJOSP) go through the grommet furthest Install rubber grommets in holes for output transformer leads. Mount the output transformer using the () - x screws and corresponding keps nuts onto the outside of the chassis next to the power transformer (output transformer is not recessed). Install the transformer so that the Red, Blue and Brown wires go through the grommet closest to the power transformer. The Yellow and Black wire GROUND AMP FUSE OFF ON VOLUME VOLUME BUILD. MODIFY. REPAIR.

8 CHASSIS CROSS-SECTION FOR COMPONENT ASSEMBLY - INDICATES CHASSIS EDGE GROUND SWITCH POWER SWITCH POT. & NOB INPUT & SPEAER JACS FUSE HOLDER INDICATOR LAMP from the power transformer. The screws will go through the outside of the chassis, and the nuts will be installed in the inside. Use a screwdriver and adjustable wrench to tighten. Mount your ground and power switches using their pre-assembled hardware. Un-thread the hardware from the switch, insert the switch through the chassis cut out, and reapply hardware. Mount the fuse holder using its pre-assembled hardware and adjustable wrench. Install fuse. Mount indicator lamp using its pre-assembled hardware and adjustable wrench. Mount potentiometers using its pre-assembled hardware and / nut driver. Make sure potentiometers are mounted with their lugs facing up towards the open end of the chassis. Quick Tip: When mounting the pots, make sure the toothed locking washer goes between the potentiometer and the chassis. The flat washer will go on the outside of the chassis and the nut will tighten down Once you have the pots securely installed, turn the shaft of the pot all the way counter-clockwise. Install the chicken head knob on each pot, making sure the pointer of the knob is pointing to on the chassis. Use a small flat head screwdriver to tighten the set screw in the back of the knob securely on the pot shaft. Mount octal tube sockets and tension clamp using the () -0 screws and keep nuts. When mounting, be sure to choose an orientation and keep this orientation uniform throughout all octal sockets. Install octal sockets with solder lugs facing inside the chassis. While mounting octal sockets, it is best to simultaneously mount tube clips. To do so, use your hand to hold tube clip over mounting holes on the outside of the chassis, while still holding tube socket in place. Insert screw from the outside towards the inside, fasten nut from the inside. Repeat with second mounting hole, then tighten both nuts using a screwdriver. Mount speaker jacks using its pre-assembled hardware and / nut driver. The JA shorting jack (jack with pins) should be mounted closest to the output tubes. The J jack should be mounted closest to the preamp tubes. Mount 9-pin tube sockets using () -0 screws and keps nuts and tighten down with adjustable wrench and screwdriver. Here again, make sure to choose an orientation and keep it uniform throughout all 9-pin sockets. CHASSIS CROSS-SECTION FOR SOCET ASSEMBLY OCTAL SOCET 9-PIN SOCET

9 SECTION : TRANSFORMER WIRING PLEASE NOTE: ONLY MAE FINAL SOLDER CONNECTIONS IF ALL LEADS ARE CONNECTED TO COMPONENT. IT IS BEST TO ONLY SOLDER EACH JOINT ONE TIME, SO UNLESS ALL COMPONENTS ARE IN PLACE, WAIT TO SOLDER. GROUND SWITCH FUSE HOLDER POWER SWITCH PILOT LIGHT VOLUME JA JA VOLUME MOJO ex FROM OUTPUT TRANS. Y JA J 9 AX 9 AY POWER TRANSFORMER Twist all matching pairs of wires coming out of the power transformer. Measure length needed for each wire, allow yourself extra lead and cut to length. This will eliminate excess wire and free up space in your chassis apply this principle to all leads. from the power transformer (v rectifier filament). Connect these two wires to pins and (top opening of pins) of the rectifier tube socket. Solder pin but don t solder pin yet. Measure, strip and tin the Green wires from Strip (/ ) and tin the two Red wires from the the power transformer (.v tube filament). These will go to your pilot light with the () 00ohm resistors to ground. power transformer (HV secondary). Solder one wire to pin and the other to pin of the rectifier tube socket, the octal socket that is closest to the power transformer. NOTE: These wires carry AC voltage, so either wire can go to either pin or. Measure and strip the Black wires coming from the power transformer. One of these will go to your fuse and one will go to the power switch. (It doesn t matter which wire goes to either component) Measure, strip, and tin the two Yellow wires Double check your wiring. BUILD. MODIFY. REPAIR. TWEED Deluxe Layout Model E JA 00 Ω 00Ω JA

10 OUTPUT TRANSFORMER Twist all sets of wires together. Primary is Red, Blue and Brown. Secondary is Black and Yellow. If you have the MOJOSP, the secondary wires will be Black, Yellow, Green and Orange. Connect the Red wire (do not solder it just yet) to pin of the rectifier. Connect a small jumper wire from the middle lug (shorting lug) of the JA jack to its ground lug. Solder the Blue wire from the output transformer to pin of the octal socket closest to the rectifier. Connect the Black wire from the output transformer to the ground lug of the JA jack. Solder the Brown wire from the output transformer to pin of the octal socket closest to the speaker jacks. JA J Solder the middle lug and ground lug of the JA jack. Connect the Yellow wire from the output transformer to the tip lug of the speaker jack (JA jack) closest to the 9octal sockets. If you are using the MOJOSP output transformer choose which use with the output jacks. tap that youwould like to (Yellow - Ohm, Green - Ohm, Orange - Ohm) Connect a jumper wire from the tip lug of the JA jack to the tip lug of the J jack. JUMPER WIRES Double check your wiring. AX TRANSFORMER SCHEMATICS POWER TRANSFORMER OUTPUT TRANSFORMER V RED ( ) 0V BLAC ( ) 00V BLAC/BLUE ( ) /0V WHITE ( ) 0V BLAC/YELLOW ( ) 0V BLAC/GREEN ( ) 0V BLAC/RED ( ) 0V RED/YELLOW ( ) BLUE ( ) 000 Ω V RED ( ).V GREEN ( ).V GREEN ( ) YELLOW ( ) RED ( ) 000 Ω YELLOW ( ) Ω BLAC ( ) BROWN ( ) V AC YELLOW ( ) w w w. m o j o t o n e. c o m 9

11 SECTION : BOARD ASSEMBLY FOLLOW THE WIRING DIAGRAM TO POPULATE BOARD. BE SURE TO TAE NOTE OF POLARIZED CAPACITOR ORIENTATION FOR THE () UF CAPS, AND () UF CAPS. COMPLETED WITH COMPONENTS 0 0 0Ω 0. uf 0.uF uF. 0.uF 0.uF 0Ω Starting at one end of the front side of the board, identify the necessary components for each eyelet connection and place leads through the eyelet holes. Once inserted, bend the leads under the bottom of the board to hold them in place. PRO Tip: When a capacitor and resistor are both running between the same eyelet holes, you can twist their leads around one another and solder to form a solid mechanical connection. Once all components are in place on the front side of the board, flip the board over and start applying traces or jumper wires to the backside of the board. These are illustrated on your wiring diagram below as striped lines connecting different eyelet holes. Use your yellow cloth-covered wire and cut each piece to size. Insert leads and bend around front of eyelet board to secure them. PRO Tip: Make a small hook with the wire so that the wire hooks into the eyelet. CROSS-SECTION OF EYELET BOARD 0 BUILD. MODIFY. REPAIR.

12 BAC SIDE OF EYELET BOARD Once jumper wires are in place, follow wiring diagram to create leads where necessary. These will be the wires that go out from the component board to other components in the circuit. Insert these leads down through the front of the board and bend around back to secure. Quick Tip: Use the included Wiring Diagram to approximate lead lengths Once all components, jumpers, and leads are in place, start at one end of the board and begin soldering every eyelet hole. Make Sure you don t have any bad or cold solder joints by lightly pulling each wire after solder has set. SOLDER EXAMPLES PROPER SOLDER COLD SOLDER PROPER SOLDER COLD SOLDER

13 SECTION : BOARD INSTALLATION INTO CHASSIS Hold your board up to the chassis roughly in the area it will need to be installed. Locate the two small fiber board mounting holes drilled into the chassis. With these in mind, try to eyeball a good place to drill these holes into your fiberboard. This should be between large components so you don t risk puncturing anything vital. Repeat with main component board. Use the - keps nuts and hand tighten screws. Once in place, fasten down the screws and nuts using a screwdriver and adjustable wrench. HOLES FOR BOARD MOUNTING Once you have identified a good orientation for the holes, hold the fiberboard in place and using the left edge as a guide, make a small mark with a pencil or sharpie on the edge of your chassis as a guideline. Insert the blank backboard into the chassis and align its left edge with the sharpie / pencil guideline you just made. 9 9 Y AX AY Once aligned, hold the backboard firmly in place, tilt the chassis onto it s side and use your sharpie / pencil guideline to mark the backboard through the mounting holes. Using an drill bit, create the mounting holes in your backboard. COMPLETED COMPONENT BOARD Line backboard up with main component board and mark the component board through the holes in the backboard. BACER BOARD Using the same drill bit, make the mounting holes in your main component board. Be careful when drilling that you do not drill through any components or clip them. NORMAL VOLUME VOLUME BRIGHT Tilt the chassis on it s side and insert the - screws from the top of the chassis through to the outside. AMP OFF GROUND FUSE ON Holding the screws in place, insert the backboard into the chassis, and push the mounting holes down over the screws. BUILD. MODIFY. REPAIR.

14 0.0 u 0.0 u SECTION 9: WIRING THE SOCETS, JACS & POTS PLEASE NOTE: SPACE 0. uf + 0 Ω 0. uf uf. 0.0 uf 0. uf 0. uf power tube sockets) must connect to corresponding pins on the sockets. Pin to pin, Pin to pin. + Preamp tubes do not have to be in phase. uf 0 Ω hole) to pin of the rectifier. Verify that you have + three wires on pin of the rectifier socket. 0 Solder the B+ wire from the board (lower left 0 IS VERY LIMITED IN A TWEED CHASSIS. THIN AHEAD WHEN SOLDERING THE LEADS INTO PLACE AND STAY ORGANIZED. FOLLOW THE WIRING DIAGRAM AND WOR FROM THE FRONT OF THE CHASSIS TO THE BAC AND FROM THE POWER TRANSFORMER END OVER V V 9V V 9V 0V.V V V.V 0 0 V and of the AY Preamp tube socket.. V 0 0 Quick Tip: Do not forget the jumper across pins B+ WIRE. On the back of both power tube sockets, JA AX 0.0 uf 9 AY. "Deluxe"pinLayout V of thev. SolderModel pin ine place. Connect one Revision. 0//0 V V 9V V connect a. watt resistor between pin and 00 JA before you begin wiring 00pF Y 9 0V + VOLUME VOLUME + 0Ω 0. uf 0Ω 00 Ω 00Ω uF 0.0 uf 0.uF 9 JA 00pF. PILOT LIGHT FUSE HOLDER 0.00 uf GROUND SWITCH 0.uF Wire the pots and add the capacitors and grounds POWER SWITCH 0 JA JA. 0.0uF. AX JA Using the Wiring Diagram, begin wiring the 0 V V 9V V 9V 0.uF uf 0.uF 0. uf. V 0V.V V 0 0 w w w. m o j o t o n e. cv om uf + uf three-line power cord and strain relief. uf 0 0 Referring to the Wiring Diagram,.V Install the.v V V 0 Ω 0 Make sure the power tubes are in phase. This means that the filament wire (Black and Yellow twisted wire running between the MOJO ex Quick Tip:.. out Model E work your way across the chassis towards the pre0//0 amp tubes. V V V V 9V V 9V 0V tube sockets starting from the power tubes and TWEED Deluxe Layout Model E Revision. //0 wires from 0 resistors to pin of one of the power tube sockets. Connect the other wire from the 0 resistor to pin of the other power tube VOLUME VOLUME sockets. 9V Pro Tip: Remove Input Jacks to install the resistors + 0. uf 0. uf uf uf install and wire the input jacks. This is one of the most problematic areas for wiring. Be sure to note orientation of solder lugs. uf 0 Ω Paying close attention to the Wiring Diagram,. 0.00uF 0.0 uf

15 SECTION 0: INITIAL CHASSIS TESTING Ensure all solder joints and connections are good. Physically inspect every tube socket closely. Look and listen for loose hardware by shaking chassis. Ensure chassis is free from debris before plugging in. Check for pinched or burnt wire insulation. Adjust lead dress so it is easy to see components. Power on amp without the tubes installed. Using a multimeter Check the power transformer secondary AC voltages (at tube socket for filaments). This will be pins + and pin 9 on pre-amps and pins and on the s. Turn off the amp and install the rectifier tube. Turn on amp and allow it to warm up (approximately one minute). Watch for any kind of arcing or smoke from any component or transformer. If you see anything, shut down the amp immediately. Disconnect the amplifier from wall socket, check voltages on the filter capacitors (DC voltage), make sure they are drained, and then recheck your wiring. Check the B+ voltages with on pin on the rectifier and pin on both output tube sockets. Turn off the amplifier. Install the preamp tubes, then power up the amplifier and ensure the filaments are working. Check the B+ voltages on pin and pin of the preamp tubes. Turn the amp off and install the output tubes. Plug in the speaker. Power on the amp and check for proper filament operation. Check the voltages at the test points on the wiring diagram. Check the voltage on pin of each tube. Ensure the voltage reading is near 0V +/- 0mV to avoid red-plating of the tubes. Quick Tip: Red plating occurs when too much current is applied to the plate (anode) of a vacuum tube. It will overheat and glow cherry red. Turn the power off immediately if this happens. Let the amp idle on for half an hour or so for the chassis to be warm and do the bump test. Quick Tip: A bump test is exactly what it means. Use a non conductive tool, such as a wooden handle of hammer or plastic handle of a screw driver, to hit the edge of the chassis or pick your amp up about an inch and drop it.- Don t worry it won t harm your amp. This helps you test for bad solder joints and any loose hardware as well as lets you know if there is a physical problem with one of your tubes. BUILD. MODIFY. REPAIR.

16 SECTION : CAB PREP AND SPEAER INSTALLATION CABINET PREPARATION Remove the upper and lower back panel of the cabinet. Mounting holes for the chassis have already been drilled and are located on either side of the chassis cutout. Push back the insulation on the other end of the wires by and tin them. Test fit your chassis into the cabinet. SAFETY FIRST! THE TUBES WILL BE HOT IF THE AMP WAS RECENTLY ON. 0Ω 0Ω 0Ω 0. uf 0. uf 0.uF 0.uF 0.uF uF 0.0uF 0.uF 0.uF 0.uF 0.uF 0.uF 0.uF Ensure that the () copperhead baffle mount screws are tight. This is called a floating baffle design and is prone to rattle if the hardware is not tight. SPEAER INSTALLATION Unscrew the four nuts from the speaker mounting bolts inside the cabinet. Align the speaker mounting holes to the baffle bolts then place the speaker into the cabinet with the terminals on top and facing the chassis. Note the orientation of the speaker terminals and gently press the speaker onto these bolts ensuring that the bolts are emerging through the mounting holes of the speaker at the same time. QUIC TIP: Be careful! It s easy to stick a speaker stud through the speaker cone. Install and tighten the EPS nuts. SPEAER WIRE HARNESS ASSEMBLY Twist the two lengths of black and white ga. stranded wire together. Push the insulation back from both wires on one end and tin them. Unscrew the back of the right angle plug. Solder the tinned wires to the plug; white to center and black to shield, then reinstall the back.

17 AX AX SECTION : CHASSIS INSTALLATION Install the chassis mount screws into mount holes on top of cab. Turn the cabinet upside down may make it easier for chassis installation. PRO TIP: Be mindful of tweed and tolex when installing. Use painter s tape if you need to at pinch points for the cab, as it can protect from tearing or lifting up the tweed covering. Make sure you do not pinch any wires between the chassis screws/nuts, chassis and cabinet. Do not over-tighten the chassis screws as it may deform and weaken the cabinet. Place the chassis into the cabinet, lining up holes with mount screws. Install and hand tighten the keps nuts for the chassis screws. Do not tighten these two screws yet. Leave them somewhat loose for chassis alignment. Hold the upper back panel in place and slide the chassis back so it is flush against the back panel. Remove the back panel and tighten down the two chassis mount screws. Check chassis alignment with the back panel in place, adjust as necessary. Plug speaker into speaker jack that is closest to the power tubes. Install the cord strain relief to the side of the cabinet using # screw. Install the tubes. Install the upper and lower back panels. Do not over-tighten the screws. Y CHASSIS REAR PANEL PLUG SPEAER CABLE HERE AY AX J JA Y BUILD. MODIFY. REPAIR.

18 SECTION : SOUND TEST Turn on the amp and let it warm up. After warm-up, ensure the tubes are not red plating. Rotate all controls fully and listen for noise. It is normal to have some noise at high volume levels. Plug in an instrument cable and listen for any crackle, pops, strange oscillations or feedback. Leave on for a while so the tubes and components can burn in - (not literally) ROC OUT!! CONGRATULATIONS!! YOU HAVE JUST BUILT YOUR VERY OWN TWEED DELUXE. THERE IS ONLY ONE ON THE PLANET THAT IS LIE YOURS. WE HOPE YOU HAVE ENJOYED THIS EXPERI- ENCE AND GAINED NOWLEDGE TO HELP YOU BECOME MORE CONFIDENT TO BUILD MANY MORE AMPS AND SPREAD YOUR NOWLEDGE. SECTION : TROUBLESHOOTING DEPENDING ON THE ISSUE YOU HAVE, YOU WILL NEED TO DIAGNOSE WHICH PART OF THE CIRCUIT IS FAULTY. TRY TO WOR THE PROBLEM ANALYTICALLY, YOU CAN MAE PROB- LEMS WORSE OR CREATE NEW ONES BY DOING UNNECESSARY REPAIRS. 99% OF THE TIME IT IS SIMPLE, A BAD SOLDER JOINT, NO SOLDER ON JOINT, CAPACITOR IN BACWARDS, ETC.. HERE ARE A FEW RESOURCES WE SUGGEST. RESOURCE WEBSITES The best resource with the most extensive info on most vintage amps. How the Fender E Deluxe Amp Works The non-electronic tech s guide to understanding the classic E tube amplifier and how it works. By Rob Robinette TDPRI.com Telecaster discussion page reissue -various builders are on this forum and a wealth of info for history and help. RESOURCE LITERATURE Tube Guitar Amplifier Essentials and All About Vacuum Tube Guitar Amplifiers by Gerald Weber Truly must read books by Gerald Weber for any amp tech. You can purchase these at Mojotone. The Tube Amp Book By Aspen Pitman. A great resource for schematics and basic tube info. Comes with DVD that has over 00 schematics of vintage tube amp technology. RCA Tube Receiving Manual This is one of the books that really started the guitar amp craze. In the back of the book, there are many drawings that will look familiar to you. Leo Fender used this very book to develop his first amps. These are out of print, but you can find them on Ebay and Amazon.

19 Ready for your next build? TWEED CHAMP F STYLE COMBO Mojotone s Tweed Champ Style Amp it is based on the beloved watt amp from the 90s. These amps were perfect for recording and were featured on a wide array of recordings from Joe Walsh s Rocky Mountain Way all the way to Derek & the Dominos Layla. Modeled after the historic Class-A platform, this amp delivers warm tones that are harmonically rich and have a beautiful low volume crunch. SU # GTC90 Class Type: Single Ended Class A All Tube Amplifier Bias Type: Cathode Biased Output: ~W Build time: hours Circuit: F TWEED DELUXE E STYLE COMBO Mojotone s Tweed Deluxe Style Amp is based on the popular E circuit from the 90s and is by far our most popular amplifier. These amps were originally designed as medium power amps that would allow a musician to plug in more than one amplified instrument at a time. At higher volumes, this amp produces saturated tones that were adopted as signature tones for the likes of Billy Gibbons, Neil Young, Don Felder, and Larry Carlton. SU # GFTD9 Class Type: Class A/B all Tube Amplifier Bias Type: Cathode Biased Output: ~ watts Build Time: hours Circuit:E MOJO TWEED BASSMAN F-A STYLE COMBO Mojotone s Tweed Bassman Style Amp is based on the late 0s F-A circuit which seems to be the most commonly used of the Bassman circuits. These 0 Watt amps are known for their bold and pristine clean sounds as well as their classic unmistakeable dirt. The Bassman is extremely versatile and has been used by tons of iconic guitarists from Mike McCready, of Pearl Jam fame, all the way to Stevie Ray Vaughan himself. SU # GTW9 Class Type: A/B all Tube Amplifier Bias Type: Fixed Output: ~0 watts Build Time: hours Circuit: F-A BLACFACE PRINceTON REVERB STYLE COMBO The Blackface Princeton Reverb has been a staple in guitar tone since its inception in 9. The Princeton Reverb was essentially all the good parts of its predecessor, the Tweed Princeton, but with a long-spring reverb and tube-driven tremolo circuit added. Over the years the Princeton Reverb has worked its way into the gear repertoire of many renowned guitarists such as Ryan Adams, Larry Carlton, Glen Campbell, and Tommy Tedesco. SU # GBPR0 Class A/B All Tube Amplifier Bias Type: Fixed Output: ~- Watts Build Time: hours Circuit: AA BLACFACE DELUXE REVERB STYLE COMBO One of our most popular amps, the Mojotone Deluxe Reverb Style it, is based on arguably the most widely used guitar amp of all time. Just about every iconic guitarist imaginable has played through a Deluxe Reverb at some point or another, but this amp has been specifically touted by artists such as Mike Campbell, Vince Gill, Jackson Brown, and even Elvis Costello. SU # GBDR09 Class Type: A/B All Tube Amplifier Bias Type: Fixed with an adjustable bias potentiometer Output: ~ Watts Build Time: hours Circuit: AB BUILD. MODIFY. REPAIR.

20 If you are looking for an amplifier that is compact, lightweight, but powerful, this is the jewel for you. It produces beautiful cleans and one of the best distortion tones ever produced. The watt amplifier is the epitome of perfect vintage Marshall tone. SU # GBC Class TYPE: A/B All Tube Amplifier Output: ~ Watt Circuit: 9 Cathode Biased Build Time: hours BRITISH WATT STYLE X COMBO This kit produces similar tones to a -90 Marshall JCM00 0. SU # G0099 Class TYPE: A/B Tube Amplifier Fixed Bias with an adjustable bias potentiometer Output: ~0 Watts Build Time: hours Circuit: 0 BRITISH 00 STYLE AMP This was the first amplifier Marshall ever built, based off of the FA circuit. Favored by blues and rock guitarists, this amp can produce a warm sustain and elegant clean tones, with a pronounced rectifier sag. Played by guitar greats such as Angus Young and Gary Moore. SU # GC Class TYPE: A/B all Tube Amplifier Output: ~ watts Circuit: M Bias Type: Fixed Bias w/ adjustable potentiometer Build Time: hours BRITISH STYLE X COMBO Few amps have rivaled the commanding image and sound of the Super Reverb. Since its introduction in 9, the Super Reverb has remained highly sought-after due to its unique tonal qualities and extreme versatility. Having a use on stages of all sizes and in any studio situation, the Mojotone Super Reverb style amp has the potential to handle literally any task at hand. SU # GBSR Class TYPE: A/B Tube Amplifier Output: ~0 Watts Circuit: AB Our Brownface Deluxe Style kits are modeled after the brown era model G from the earlier 90s. Great for recording or small gigs. The amp can go from a tweed clean/dirty to a british style overdrive with the turn of the volume knob. Includes bias modulated tremolo. SU # GBFD0 Class TYPE: AB all tube amplifier Output: ~ watts Circuit: G Mojotone s Tweed Twin Low Power Style Amp it is a complete tonal powerhouse. Sporting Watts of power, the amp has all the sweet, vocal qualities and rich dynamic response as the original. nown for being a plug-and-play amp, the E-A circuit has been used most notably by Eric Clapton and has been said to cut more than its higher powered counterpart (Tweed Twin High Power). SU # GTTL0 Class Type: AB all Tube Amplifier Output: ~ watts Circuit: E-A Bias Type: Fixed Bias w/ adjustable bias potentiometer Build Time: hours Bias Type: Fixed Bias Build Time: hours Bias Type: Fixed Build Time: hours BLACFACE SUPER REVERB STYLE COMBO BROWNFACE DELUXE STYLE COMBO TWEED TWIN E-A LOW POWER STYLE COMBO 9

21 the workbench Tools the Pros use WORBENCH TESTED. AMP PRO APPROVED. YEARS OF EXPERIENCE AND ENDLESS PASSION HAVE DRIVEN OUR TEAM AT MOJO TO CREATE THE QUALITY PRODUCTS THAT WE OFFER. NOW YOU CAN USE THE TOOLS THAT WE DO IN YOUR SEARCH FOR THE PERFECT. WELLER WTCPT TEMPERATURE CONTROLLED SOLDERING STATION MOJO SYG A0L DIGITAL MULTIMETER SU# 0 MOJO PICUP WINDING MACHINE SU# 0 XCELITE -PIECE PRECISION SCREWDRIVER SET SU# NTOL GROOVETECH JAC/POT WRENCH SU# 0000a SU# QGTJPT RENE MARTINEZ -PIECE MICRO-TIP SCREWDRIVER SET WELLER ANTI-STATIC DE-SOLDER PUMP SU# NTOL0 XCELITE ELECTRICAL CUTTING AND STRIPPING PLIERS SU# NTOL XCELITE SERRATED LONG REACH PLIERS XCELITE LONG NEEDLE NOSE PLIERS MOJO AMPLIFIER CHASSIS STAND SU# NCHS0 ESTER ROSIN CORE SOLDER SU# NTOL0 SU# NTOL CONTACT & ORDERING INFO SU# QGTJPT SU# NTOL follow sales@mojotone.com or WORTH BEVERAGE DR., BURGAW, NC Disclaimer: MojoTone, LLC makes no representations or warranties of any kind as to the information, content, procedures, materials or operation of this book. To the full extent permissible by applicable law, MojoTone, LLC disclaims all warranties, expressed or implied, including but not limited to, implied warranties of merchantability or fitness for any particular purpose. MojoTone, LLC will not be liable for damages of any kind arising from the use of this book, including but not limited to direct, indirect, incidental punitive and consequential damages.