THE MOJOTONE 5F1 STYLE COMBO AMP

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2 THE MOJOTONE TWEED CHAMP 5F1 STYLE COMBO AMP M ojotone s Tweed Champ Style Amp Kit is based on the beloved 5 watt amp from the 1950s. 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 6V6 platform, this amp delivers warm tones that are harmonically rich and have a beautiful low volume crunch. The amp utilizes one 6V6 power tube and one 12AX7 preamp tube, giving the amp its famed lush harmonic composition. We chose our Mojotone American Vintage AV8C 15 Watt speaker to complement the 5F1 style circuit since it has a nice clean sound at its lowest volumes but introduces an articulate and unique grit as you increase the amp s volume. Don t be fooled by the fact that this circuit features only a single volume control; 5F1s have been used by some of the greatest guitarists and on some of the greatest recordings of all time. Our Tweed Champ style amplifier is extremely tactile and responds well to dynamic playing; so no matter if you play jazz, classic rock, blues or anything in between, you will not be disappointed.

3 CONTENTS SECTION 1: SAFETY PG. SECTION 2: TOOLS PG. SECTION : PARTS INVENTORY PG. SECTION : COMPONENT IDENTITY & ORIENTATION PG. SECTION 5: CHASSIS PREPARATION PG.6 SECTION 6: TRANSFORMER WIRING PG.8 SECTION 7: BOARD ASSEMBLY PG.10 SECTION 8: BOARD INSTALLATION INTO CHASSIS PG.12 SECTION 9: WIRING THE SOCKETS, JACKS & POTS PG.1 SECTION 10: INITIAL CHASSIS TESTING PG.1 SECTION 11: CAB PREP & SPEAKER INSTALLATION PG.15 SECTION 12: CHASSIS INSTALLATION PG.16 SECTION 1: SOUND TEST PG.17 SECTION 1: TROUBLESHOOTING PG.17 MORE FROM MOJOTONE PG.18 Copyright 2018 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 1: SAFETY SAFETY FIRST! ELECTRONICS CAN BE DANGEROUS AND MUST BE TREATED WITH RESPECT. ANY CIRCUIT THAT WORKS WITH 120 VAC POWER FROM AN ELECTRICAL OUTLET IS ESPECIALLY DANGEROUS AND COULD POTENTIALLY KILL YOU. HERE ARE SOME SAFETY GUIDELINES TO KEEP YOU SAFE AS YOU WORK: 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. Keep 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 2: 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 /16 drill bit and 5/2 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 18 FOR A FULL LIST OF TOOLS, PARTS AND KITS TO ADD TO YOUR WORK BENCH.

5 SECTION : PARTS INVENTORY 5Y *optional based on order 5Y 6V6 (1) Chrome Chassis 6V6 12AX7 12AX7 (1) Solid Pine Cabinet* X7 A 12 (1) 10'' Install Power Cord (1) 6 8'' Jensen C8R 25w Ω 6V Speaker* 5Y 7 (1) MOJO 760 Power Transformer w/ hardware (1) (1) NOS 771 Output Transformer (1) Eyelet Board & Backer Board (1) (1) 70Ω.7 Vacuum Tubes* (2) Octal Tube Socket & Tension Clamp (1) 9-Pin Tube Socket & Tube Shield Ω 1.7K 6 (1) 1MA Potentiometer w/ hardware (1) Chicken Head Knob 220K (1) Fuse Holder & 2amp Fuse (1) J12A 1/'' Shorting Jack w/ hardware BUILD. MODIFY. REPAIR. w/ hardware 22K 10

6 (1) Pilot Light (1) Three-Lug Ground (1) Indicator Lamp Assembly w/ hardware (1) Jewel Lens (1) Speaker Jack (2) Rubber Grommets w/ hardware RESISTORS CAPACITORS HARDWARE (1) 2w.7k Metal Oxide 0.022uF 600v Orange Drop () -0 1 / '' Screw & Kep Nuts (2) / Screw & Kep Nuts (1).5w 220k Carbon Comp. (2).5w 22k Carbon Comp. (1).5w 1m Carbon Comp. (2).5w 1.5k Carbon Comp. (2).5w 100Ω Carbon Comp. (2).5w 68k Carbon Comp. (2).5w 100k 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 (1) 75v Electrolytic (2) 75v Electrolytic + 16uF 8uF 25uF (1) 50v Sprague Atom WIRES NON-POLARIZED (6) -0 / 8 Screw & Kep Nuts (2) / 2 Screw & Kep Nuts (2) / 2 Screw & Kep Nuts 22 gauge Yellow Pre-Tinned 18 gauge Green Pre-Tinned 22 gauge Black Stranded 22 gauge White Stranded

7 SECTION 5: 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. Mount the power transformer using its pre-assembled hardware and your 1/2 nut driver. The transformer will be recessed through the rectangular cutout in the belly of the chassis. Install rubber grommets in holes for output transformer leads. FLATTENED VIEW OF INSIDE OF CHASSIS FUSE HOLDER POWER TRANSFORMER INDICATOR LAMP POTENTIOMETER INPUT JACKS Mount the output transformer using the (2) 8-2 x 1 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 and Blue wires go through the grommet closest to the power transformer. The wire goes through the grommet furthest 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. OCTAL TUBE SOCKETS Y 7 8 GROUND LUG RUBBER GROMMETS V6 7 8 SPEAKER JACK 9-PIN TUBE SOCKET 12AX7 Mount the fuse holder using its preassembled hardware and adjustable wrench. Install fuse Solder the two 100Ω resistors on the indicator lamp then mount it using its preassembled hardware and adjustable wrench. SIDE VIEW 1 AMP 1 2 FUSE BOTTOM VIEW 6 BUILD. MODIFY. REPAIR.

8 CHASSIS CROSS-SECTION FOR COMPONENT ASSEMBLY POT. & KNOB INPUT JACKS - INDICATES CHASSIS EDGE SPEAKER JACK FUSE HOLDER INDICATOR LAMP Mount the potentiometer using its preassembled hardware and 1/2 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 1 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. Solder the 1M resistor on the speaker jack closeset to the potentiometer. using their pre-assembled hardware and 1/2 nut driver and adjustable wrench, mount the two input jacks. Be sure to note their orientation on the wiring diagram. Mount octal tube sockets and tension clamp using the () 8-0 screws and keps 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. PRO Tip: Mount the ground lug on the 5Y tube socket screw closest to the edge of chassis. Mount 9-pin tube sockets using (2) 1-0 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. 9-PIN SOCKET 1M OCTAL SOCKET 7

9 SECTION 6: TRANSFORMER WIRING PLEASE NOTE: ONLY MAKE 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. POWER TRANSFORMER Twist all matching pairs of wires coming out of the power transformer. FLATTENED VIEW OF INSIDE OF CHASSIS FUSE INDICATOR VOLUME 1M HOLDER LAMP J12A J12A 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. 100Ω 100Ω Strip (1/2 ) and tin the two Red wires from the power transformer (HV secondary). Solder one wire to pin and the other to pin 6 of the 5Y rectifier tube socket, the octal socket that is closest to the power transformer. These wires carry AC voltage, so either wire can go to either pin or 6. MOJO 760ex FROM OUTPUT TRANS. Measure, strip, and tin the two Yellow wires from the power transformer (5v rectifier filament). Connect these two wires to the top opening of pins 8 and 2 of the 5Y rectifier tube socket. Solder pin 2 but don t solder pin 8 yet Y V6 7 8 SPEAKER JACK 12AX7 POWER TRANSFORMER SCHEMATIC RED (10 ) Measure, strip and tin the 2 Green wires from the power transformer (6.v tube filament). These will go to your indicator light with the (2) 100Ω resistors to ground. Measure and strip the Black and White wires coming from the power transformer. One of these will go to your fuse and one will go to the potentiometer on the bottom lug. (It doesn t matter which wire goes to either component) Double check your wiring. 0V BLACK (10 ) 75MA RED/YELLOW (10 ) 75MA RED (10 ) GREEN (10 ) A 120V BLACK (10 ) GREEN (10 ) YELLOW (10 ) 5V A YELLOW (10 ) 8 BUILD. MODIFY. REPAIR.

10 OUTPUT TRANSFORMER Primary is Blue and Red. Secondary is Yellow. Solder the Blue wire from the output transformer to pin of the 5Y octal socket closest to the rectifier. Solder the Red wire from the output transformer to pin of the octal socket closest to the speaker jacks. Double check your wiring. OUTPUT TRANSFORMER SCHEMATIC BLUE (5.5 ) YELLOW (.5 ) 5000 Ω Ω RED (5.5 ) LEAD GROUNDED TO CASE pro tip: Connect the Yellow wire from the output transformer to the tip lug of the speaker jack. SOLDERING BASICS SOLDERING IS AN ESSENTIAL SKILL FOR EVERY LEVEL OF AMP BUILDER. HERE ARE A FEW TIPS FROM THE AMP PROS AT MOJOTONE. SAFETY FIRST! THE SOLDERING IRON TIP REACHES A TEMPERATURE OF 00 C SO NEVER DIRECTLY TOUCH IT OR ANY COMPONENT THAT YOU ARE SOLDERING WHEN IT IS HEATED. ALWAYS WORK IN A WELL VENTILATED AREA OR USE A SMOKE ABSORBER. Prepare the joint to be soldered, i.e. twist leads together, hook leads into eyelets, etc. SOLDER EXAMPLES Tin (apply solder to) the tip of the soldering iron. This will keep it from oxidizing and prolong the life of your soldering tip. Wipe excess on sponge. Clean the tip often while soldering. This will help the iron heat more consistently and evenly. Be sure to use clamps or tweezers if needed to hold the components to be soldered in place. Touch the iron directly on the joint to be soldered for about two seconds to get it hot enough to melt the solder. PROPER SOLDER COLD SOLDER Touch the solder to the joint. As it melts let it flow onto the joint to create a solid bond. Lift the solder off first and then remove the iron from the component. Another method is to tin the stripped wire and then touch it directly to the heated component. Place soldering iron back into the holder. PROPER SOLDER COLD SOLDER 9

11 SECTION 7: BOARD ASSEMBLY FOLLOW THE WIRING DIAGRAM TO POPULATE BOARD. BE SURE TO TAKE NOTE OF POLARIZED CAPACITOR ORIENTATION FOR THE (1) 16UF CAPS, (2) 8UF CAPS AND (1) 25UF CAPS. COMPLETED WITH COMPONENTS 220K 68K 68K 1.5 K 16uF 8uF 8uF 70Ω 25uF V 0.022uF 0.022uF 1.5 K 22K 100K 100K.7K 22K 70V 25V 275V 19V 165V 165V 1.65V Starting at one end of the front side of the Once all components are in place on the board, identify the necessary components front side of the board, flip the board over and for each eyelet connection and place leads start applying traces or jumper wires to the through the eyelet holes. Once inserted, bend backside of the board. These are illustrated on the leads under the bottom of the board to hold your wiring diagram as striped lines connecting them in place. different eyelet holes. Use your yellow clothcovered wire and cut each piece to size. Insert PRO Tip: When a capacitor and resistor are both running between the same eyelet holes, you leads and bend around front of eyelet board to can twist their leads around one another and secure them. solder to form a solid mechanical connection. PRO Tip: Make a small hook with the wire so that the wire hooks into the eyelet. CROSS-SECTION OF EYELET BOARD 10 BUILD. MODIFY. REPAIR.

12 BACK SIDE OF EYELET BOARD 1.65V 1.65V 165V 165V 19V 275V 25V 70V 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. 11

13 SECTION 8: 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 6-2 keps nuts and hand tighten screws. Once in place, fasten down the screws and nuts using a screwdriver and adjustable wrench. FUSE INDICATOR VOLUME 1M HOLDER LAMP J12A J12A 100Ω 100Ω 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. MOJO 760 HOLES FOR BOARD MOUNTING Insert the blank backboard into the chassis and align its left edge with the sharpie / pencil guideline you just made SPEAKER JACK Y 6V6 12AX7 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 1 8 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. BACKER 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. Tilt the chassis on it s side and insert the 6-2 screws from the top of the chassis through to the outside. 12 Holding the screws in place, insert the backboard into the chassis, and push the mounting holes down over the screws. BUILD. MODIFY. REPAIR.

14 SECTION 9: WIRING THE SOCKETS, JACKS & POTS PLEASE NOTE: SPACE IS VERY LIMITED IN A TWEED CHASSIS. THINK AHEAD WHEN SOLDERING THE LEADS INTO PLACE AND STAY ORGANIZED. FOLLOW THE WIRING DIAGRAM AND WORK FROM THE FRONT OF THE CHASSIS TO THE BACK AND FROM THE POWER TRANSFORMER END OVER. FUSE HOLDER INDICATOR LAMP VOLUME 1M J12A J12A 1M 100 Ω 100Ω 220K 68K 68K uf uf 25 uf 70Ω 8 uf 8 uf 1.5 K 16 uf K 1.5 MOJO K K 22K 22K SPEAKER JACK 5Y 6V6 Solder the B+ wire from the lower left eyelet of the board to pin 8 of the rectifier. Verify that you have 2 wires on pin 8 of the rectifier socket Using the Wiring Diagram, begin wiring the tube sockets starting from the power tubes and work your way across the chassis towards the preamp tubes. 12AX7 areas for wiring. Be sure to note orientation of solder lugs. Pro Tip: Remove Input Jacks to install the resistors before you begin wiring Referring to the Wiring Diagram, wire the potentiometer. Referring to the Wiring Diagram, Install the Referring to the Wiring Diagram, install and wire three-line power cord and strain relief. the input jacks. This is one of the most problematic w w w. m o j o t o n e. c o m 1

15 SECTION 10: 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 for 6.v (at tube socket for filaments). This will be pins,5 and 9 on pre-amps and pins 2 and 7 on the 6V6 s. Using a multimeter check for 5v on pins 2 and 8 of the rectifier socket. Turn off the amp and install the rectifier tube (5Y). 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 8 on the rectifier and pin on the output tube socket. Turn off the amplifier. Install the preamp tube, then power up the amplifier and ensure the filaments are working. Check the B+ voltages on pin 1 and pin 6 of the preamp tube. Turn the amp off and install the output tube (6V6). 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 5 of the 6V6 tube. Ensure the voltage reading is near 0V +/- 50mV 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. 1 BUILD. MODIFY. REPAIR.

16 .7K.7K.7K 22K 22K 22K 220K 220K 22K 22K 220K 68K 68K 68K SECTION 11: CAB PREP AND SPEAKER INSTALLATION CABINET PREPARATION Remove the upper and lower back panel of the cabinet. 16uF 8uF 8uF 70Ω 25uF K 0.022uF 0.022uF 68K 1.5 K Mounting holes for the chassis have already been drilled and are located on either side of the chassis cutout. 22K 100K 100K Test fit your chassis into the cabinet. SAFETY FIRST! THE TUBES WILL BE HOT IF THE AMP WAS RECENTLY ON. 16uF 16uF 8uF 8uF 8uF 70Ω 25uF K 1.5 K 0.022uF 0.022uF 100K 100K 100K 100K 0.022uF 0.022uF 68K 68K 1.5 K 1.5 K 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. SPEAKER 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. QUICK TIP: Be careful! It s easy to stick a speaker stud through the speaker cone. Install and tighten the KEPS nuts. SPEAKER WIRE HARNESS ASSEMBLY Twist the two 15 lengths of black and white 18ga. stranded wire together. Push the insulation back 1 2 from both wires on one end and tin them. Solder the tinned wires to the plug; White through the center and soldered on the tip (trim excess), and Black to outer bottom lip. 15

17 12AX7 SECTION 12: CHASSIS INSTALLATION Install the 2 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.. Install the cord strain relief to the side of the cabinet using #6 screw. Install the tubes. Install the upper and lower back panels. Do not over-tighten the screws. 6V6 5Y CHASSIS REAR PANEL PLUG SPEAKER CABLE HERE 12AX7 J11 6V6 5Y 16 BUILD. MODIFY. REPAIR.

18 SECTION 1: 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) ROCK OUT!! CONGRATULATIONS!! YOU HAVE JUST BUILT YOUR VERY OWN TWEED DELUXE. THERE IS ONLY ONE ON THE PLANET THAT IS LIKE YOURS. WE HOPE YOU HAVE ENJOYED THIS EXPERIENCE AND GAINED KNOWLEDGE TO HELP YOU BECOME MORE CONFIDENT TO BUILD MANY MORE AMPS AND SPREAD YOUR KNOWLEDGE. SECTION 1: TROUBLESHOOTING DEPENDING ON THE ISSUE YOU HAVE, YOU WILL NEED TO DIAGNOSE WHICH PART OF THE CIRCUIT IS FAULTY. TRY TO WORK THE PROBLEM ANALYTICALLY, YOU CAN MAKE PROBLEMS 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 BACK- WARDS, ETC.. HERE ARE A FEW RESOURCES WE SUGGEST. RESOURCE WEBSITES The best resource with the most extensive info on most vintage amps. The non-electronic tech s guide to understanding basic tube amplifiers and how they work. 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 800 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. 17

19 Ready for your next build? TWEED CHAMP 5F1 STYLE COMBO Mojotone s Tweed Champ Style Amp Kit is based on the beloved 5 watt amp from the 1950s. 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 6V6 platform, this amp delivers warm tones that are harmonically rich and have a beautiful low volume crunch. SKU # G1TCK910 Class Type: Single Ended Class A All Tube Amplifier Bias Type: Cathode Biased Output: ~5W Build time: hours Circuit: 5F1 TWEED DELUXE 5E STYLE COMBO Mojotone s Tweed Deluxe Style Amp is based on the popular 5E circuit from the 1950s 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. SKU # G1FTD819 Class Type: Class A/B all Tube Amplifier Bias Type: Cathode Biased Output: ~15 watts Build Time: 5 hours Circuit:5E MOJOTONE TWEED BASSMAN 5F6-A STYLE COMBO Mojotone s Tweed Bassman Style Amp is based on the late 50s 5F6-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. SKU # G1TWK92 Class Type: A/B all Tube Amplifier Bias Type: Fixed Output: ~0 watts Build Time: 6 hours Circuit: 5F6-A BLACKFACE PRINceTON REVERB STYLE COMBO The Blackface Princeton Reverb has been a staple in guitar tone since its inception in 196. 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. SKU # G1BPR108 Class A/B All Tube Amplifier Bias Type: Fixed Output: ~12-15 Watts Build Time: 5 hours Circuit: AA116 BLACKFACE DELUXE REVERB STYLE COMBO One of our most popular amps, the Mojotone Deluxe Reverb Style Kit, 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. SKU # G1BDR092 Class Type: A/B All Tube Amplifier Bias Type: Fixed with an adjustable bias potentiometer Output: ~22 Watts Build Time: 7 hours Circuit: AB76 18 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 18 watt amplifier is the epitome of perfect vintage Marshall tone. SKU # G1BCK212 Class TYPE: A/B All Tube Amplifier Output: ~18 Watt Circuit: 197 Cathode Biased Build Time: 6 hours BRITISH 18 WATT STYLE 1X12 COMBO This kit produces similar tones to a Marshall JCM SKU # G Class TYPE: A/B Tube Amplifier Fixed Bias with an adjustable bias potentiometer Output: ~50 Watts Build Time: 7 hours Circuit: 220 BRITISH 800 STYLE AMP This was the first amplifier Marshall ever built, based off of the 5F6A 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. SKU # G15C228 Class TYPE: A/B all Tube Amplifier Output: ~5 watts Circuit: M5 Bias Type: Fixed Bias w/ adjustable potentiometer Build Time: 6 hours BRITISH 5 STYLE 2X12 COMBO Few amps have rivaled the commanding image and sound of the Super Reverb. Since its introduction in 196, 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. SKU # G1BSR125 Class TYPE: A/B Tube Amplifier Output: ~0 Watts Circuit: AB76 Our Brownface Deluxe Style kits are modeled after the brown era model 6G from the earlier 1960s. 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. SKU # G1BFD067 Class TYPE: AB all tube amplifier Output: ~15 watts Circuit: 6G Mojotone s Tweed Twin Low Power Style Amp Kit is a complete tonal powerhouse. Sporting 5 Watts of power, the amp has all the sweet, vocal qualities and rich dynamic response as the original. Known for being a plug-and-play amp, the 5E8-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). SKU # G1TTL01 Class Type: AB all Tube Amplifier Output: ~5 watts Circuit: 5E8-A Bias Type: Fixed Bias w/ adjustable bias potentiometer Build Time: 8 hours Bias Type: Fixed Bias Build Time: 5 hours Bias Type: Fixed Build Time: 6 hours BLACKFACE SUPER REVERB STYLE COMBO BROWNFACE DELUXE STYLE COMBO TWEED TWIN 5E8-A LOW POWER STYLE COMBO 19

21 the workbench Tools the Pros use WORKBENCH TESTED. AMP PRO APPROVED. YEARS OF EXPERIENCE AND ENDLESS PASSION HAVE DRIVEN OUR TEAM AT MOJOTONE TO CREATE THE QUALITY PRODUCTS THAT WE OFFER. NOW YOU CAN USE THE TOOLS THAT WE DO IN YOUR SEARCH FOR THE PERFECT TONE. WELLER WTCPT TEMPERATURE CONTROLLED SOLDERING STATION MOJOTONE SYG A80L DIGITAL MULTIMETER SKU# MOJOTONE PICKUP WINDING MACHINE SKU# XCELITE 6-PIECE PRECISION SCREWDRIVER SET SKU# NTOL125 GROOVETECH JACK/POT WRENCH SKU# a SKU# Q2GTJPT1757 RENE MARTINEZ 2-PIECE MICRO-TIP SCREWDRIVER SET WELLER ANTI-STATIC DE-SOLDER PUMP SKU# NTOL085 XCELITE ELECTRICAL CUTTING AND STRIPPING PLIERS SKU# NTOL11 XCELITE SERRATED LONG REACH PLIERS XCELITE 6 LONG NEEDLE NOSE PLIERS MOJOTONE AMPLIFIER CHASSIS STAND SKU# NCHS021 KESTER ROSIN CORE SOLDER SKU# NTOL110 SKU# NTOL116 CONTACT & ORDERING INFO SKU# Q2GTJPT1757 SKU# NTOL12 follow sales@mojotone.com or 17 WORTH BEVERAGE DR., BURGAW, NC 2825 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.