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This manual was developed and
published by:

TubeDepot.com LLC, Memphis, TN

Written by:

Robert Hull

Edited by:

Robert Hull

Josh Phelps

Design and Artwork by:

Robert Hull
Christian Magee

Special thanks to following for their design help:

Joe Austin

Brian Overstreet

Daniel Yakel

Matt Kirby

Mike Taylor

Aaron Coppage

Henry Lum

Ben Siler

Special thanks to the following for their excellent amp building and proofreading skills:

Matt Wendt

Brad Jones

Michael Wang

Terry Gayle

Richard Ingold

Scott McMillin

[email protected]

REGARDING THESE BOOK MATERIALS

Reproduction, publication, or duplication of this booklet, or any part thereof, in any manner, mechanically,
electronically, or photographically is prohibited without the express written permission of the publisher.

The Author, Publisher or Seller assume no liability with respect to the use of the information contained herein.

For permission and other rights under this copyright, contact TubeDepot.com.

Acknowledgements

ii TubeDepot.com

Содержание JTM45+

Страница 1: ...here to watch the assembly video Learn Build Play JTM45 Styled ASSEMBLY MANUAL with some great styled mods 50W Tube Guitar Amp Kit 1686 Barcrest Dr Memphis TN 38177 www tubedepot com Version 4 2 24 J...

Страница 2: ...t Brad Jones Michael Wang Terry Gayle Richard Ingold Scott McMillin Copyright 2011 TubeDepot com LLC 1686 Barcrest Dr Memphis TN 38134 877 289 7994 info tubedepot com REGARDING THESE BOOK MATERIALS Re...

Страница 3: ...ion Assembly and Wiring Chapter 6 Turret Board Construction Chapter 7 Turret Board Chassis and Wiring Chapter 8 Testing Chapter 9 Final Assembly Chapter 10 Schematic Appendix A Resistor and Capacitor...

Страница 4: ...o point construction quality components and just a touch of American upgrading this kit is ready to become your sound Unlike previous assembly manuals we have designed this manual for the more advance...

Страница 5: ...anyone finding out the hard way When building this kit we want your experiences to be both enjoyable and safe There are more kits to assemble and we want you to enjoy building and playing them all Th...

Страница 6: ...ale 12 w 1 16 markings Permanent marker fine tip Soldering iron 25W 40W 35W recommended TL WP35 Solder electronics safe 60 40 w rosin core recommended TS 24 6040 0027 Flux electronic liquid or paste m...

Страница 7: ...blow Mains fuse P BK AGC 3A one spare 1 Indicator lamp 6 3V incandescent P PL MARSHALL 1 1 push nut flat round 5 16 stud included w above lamp 6 jack 1 4 Amphenol mono P ACJM IHS 2 washer chassis grou...

Страница 8: ...C orange HTPVC 20 STR ORANGE 10 ft wire 18 AWG stranded hi temp PVC black HTPVC 18 STR BLACK 2 ft wire 20 AWG solid bare buss wire tinned copper BW 20 2 ft wire 16 AWG solid bare buss wire tinned copp...

Страница 9: ...M150 1 630V 2 68 100V Mallory 150 CP M150 68 100V 2 50ufd 50ufd 500V CP JJ 50X2 500V 2 capacitor clamp small CP CLAMP1 1 16ufd 475V CP FT 16 475V 1 47ufd 500V CP FT 47 500V 1 330uF 16V CP ST 330 16V 2...

Страница 10: ...crews The back panel should be secured with four panel screws With either cabinet inspect all screws I ve found screws that weren t fully tightened during assembly These loose screws will buzz when vi...

Страница 11: ...hobby knife clear the holes of any remaining vinyl covering Installing the Shielding Tape 4 3 1 Combo Cabinet Step 1 Place the cabinet back panel with the vinyl side down toward the desk Step 2 Cut t...

Страница 12: ...4 Unscrew the barrel of the phone plug and solder the two tinned wires to the plug white to center and black to shield photo 4 3a Step 5 Slide the length of yellow Techflex over this twisted pair rig...

Страница 13: ...ng screws from the speaker baffle board Step 2 With speaker in hand carefully align the speaker mounting holes to the baffle board mounting holes I recommend installing the speaker with connecting ter...

Страница 14: ...nsure it is well seated photo 5 1c Repeat step 6 as needed Step 8 Repeat above for the remaining three nuts Step 9 Once all the nuts have been mounted test fit in the cabinet and modify the hole size...

Страница 15: ...a and 5 4b Step 2 Install the three 9 pin tube sockets in the appropriate holes in the chassis Note alignment of sockets and which 6 screws are used drawing 5 4a Step 3 Install the three octal tube so...

Страница 16: ...AWG red wires The resultant dual twisted wire should be about 3 feet long Step 2 Wire the filaments for the preamp and power tubes Review the following drawings for method description drawing 5 5a 5 5...

Страница 17: ...TubeDepot com 13 Drawing 5 5a Drawing 5 5b T65 T63...

Страница 18: ...proper location of the four 8 solder terminals drawing 5 7a Use three standard 8 nuts on the solder terminals and one KEPS 8 nut on the remaining mounting bolt Step 2 Install the four aluminum stando...

Страница 19: ...switch with the switch limit pin closest to the chassis surface photo 5 10a Power Transformer Wiring Step 1 Wire the power transformer primary black and brown wires according to your local AC mains su...

Страница 20: ...16 TubeDepot com photo 5 11a...

Страница 21: ...TubeDepot com 17 photo 5 11b...

Страница 22: ...a Step 10 Remove the caps and holders from the chassis and tighten down the caps into their holders Step 10 Reinstall the caps and holders into the chassis Step 12 Install a short piece of 16AWG bare...

Страница 23: ...he can caps and solder the red wire to the juncture of the wire from the choke and the 10K resistor on the can cap drawing 5 12a Step 20 Solder the orange wire to the terminal at the opposite end of t...

Страница 24: ...output jacks as shown drawing 5 13a Step 5 Connect the bundle of secondary wires of the output transformer to the impedance selector as shown drawing 5 13a Step 6 Solder the black lead from the output...

Страница 25: ...nto the lower sleeve terminal drawing 5 14a of J3 Step 13 Insert a 3 black 20AWG wire in this sleeve terminal along with the shield and solder in place Be careful not to melt the insulation of the cen...

Страница 26: ...ch the wire first to one of the end pots and work toward the opposite direction Step 3 Twist 14 of red and blue 20 AWG wires together Step 4 Solder one end of these wires to the master volume drawing...

Страница 27: ...TubeDepot com 23 drawing 5 15c...

Страница 28: ...s adjust mounting hole size s as needed Step 6 Install the turrets into the drilled G10 board Turret Board Component Installation Step 1 Solder the four separate under board 20 AWG jumper wires betwee...

Страница 29: ...installing the components to the turret board as per the turret board layout diagrams drawings 6 2a and 6 2b For the resistor mounted across turrets T28 and T24 mount the resistor across the leads of...

Страница 30: ...AWG wire or recycled component lead s Turret Board Wire Installation Step 1 Install each colored 20AWG wire to the appropriate turret at the length specified according to drawings 6 3a and 6 3b 6 3 ph...

Страница 31: ...wires from T43 and T37 together for about 4 inches When the board is installed into the chassis these wires will be routed underneath the board along the chassis toward the power tubes TubeDepot com...

Страница 32: ...es as short as reasonably possible Step 4 Route the wires going to the front panel controls underneath the buss wire toward the chassis Step 5 Route the wires going to the power supply along the edges...

Страница 33: ...TubeDepot com 29 drawing 7 1...

Страница 34: ...hese two turrets Step 7 After 5 min of trouble free operation remove the AC power by disconnecting the AC 8 Testing It is good practice to use a power strip with a circuit breaker and an on off switch...

Страница 35: ...r immediately and review connections Step 4 Let the amplifier warm up for 2 minutes With the multimeter on the 20 volt range connect the meter s black lead to a chassis ground as before and touch the...

Страница 36: ...8 Move the red lead to the other pin 8 1 connection on the other power tube This should be about the same voltage 5 milliVolts Step 9 Remove both multimeter leads from the amp and set meter to the sid...

Страница 37: ...ed at high volumes I recommend using a wooden stick old chop stick works great and move the hookup wires around These are the wires between the turret board the tube sockets and the controls Because t...

Страница 38: ...10 Schematic 34 TubeDepot com...

Страница 39: ...graded by their values but also by their power ratings Power ratings are determined by how much heat power can be safely dissipated by the resistor Higher ratings are usually indicated by larger sizes...

Страница 40: ...k Brown Red Orange Yellow Green Blue Violet Gray White 0 1 2 3 4 5 6 7 8 9 2nd Digit Color Digit Color Digit Black Brown Red Orange Yellow Green Blue Violet Gray White 0 1 2 3 4 5 6 7 8 9 Multiplier C...

Страница 41: ...d 472 0047ufd Cornell Dubilier Silver Mica high quality high accuracy small values 1st line 250 5 direct value in pfd 250pfd tolerance 5 2nd line 500V SM voltage rating 500V batch code Metalized Polyp...

Страница 42: ...ry strong connection Importance of Proper Soldering Proper soldering is the basis for faithful equipment operation A good solder connection is physically strong and electrically reliable A poorly sold...

Страница 43: ...he contaminants By following the below sequence of events every time you make a solder connection your connections will perform better than ever before And they will look great too Sequence of Events...

Страница 44: ...s cool as possible Amplifier Feeding As with any tube amp the choice of tubes will affect the overall tone of the amp And of course some tube choices are more dramatic than others Therefore I encourag...

Страница 45: ...with more preamp drive but without so much output volume replace R15 with 22K 1W resistor and then install a 12AU7 The output stage volume will decrease giving more room to turn up the preamp 6 Insta...

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