Related Manuals for Lint Audio KWELA TONES
Summary of Contents for Lint Audio KWELA TONES
- Page 1 Type kt1 Kit assembly instructions Headphone Amplifier http://www.lintaudio.co.za/gallery/kwelatones.pdf June 2020...
- Page 2 Chu Moy. Why Kwela Tones ? Its made in a tin…Kwela is South African music made with a tin whistle ! So why not ! The headphone amplifier is designed around a dual-channel op amp such as TI s OPA1642 or TL 072 (page 31) However, a wide variety of Op Amps have been successfully implemented.
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Page 3: Table Of Contents
User guide Headphone amplifier connection details Use 2 x PP3 batteries Part 2 - Kit Assembly KWELA TONES Schematic Overlay component by part number Overlay assembly by component values Soldering with examples of a dry solder joint Cable “Left and Right” connections... -
Page 4: Part 1- Operation
Part 1- Operation Thank you for purchasing a kwela tones headphone amplifier kit. The kwela tones kt1 is designed to provide many hours of entertainment in usage. The design has been developed primarily to enhance headphone sound performance. Most headphones commercially available will function with the amplifier as the control circuit uses high quality materials. -
Page 5: User Guide
Look for a app that is a DAC, this is a digital to analogue converter, this may improve the way sound Is played by your cell phone. NOTE Avoid listening at too high a level to prevent hearing damage. Enjoy your Kwela tones... -
Page 6: Headphone Amplifier Connection Details
Headphone amplifier connection details Volume control ON/OFF Switch Audio input 3,5 mm jack Headphone socket... -
Page 7: Use 2 X Pp3 Batteries
Use 2 x PP3 batteries... -
Page 8: Part 2 - Kit Assembly
Part 2 - Kit assembly Tools required It is expected that the kit builder has some soldering experience. Always use a fine tipped soldering iron. It is not advisable to use a heavy industrial unit. Use fine solder when assembling. Some basic tools are required for assembly. -
Page 9: Kwela Tones Schematic
KWELA TONES Schematic... - Page 10 Notes Item Value Description Comments 2 C1,C6 3.3uF Cap Bipolar Maybe swopped out Op Amp may be changed to suit 2 C4,C5 470uF Cap. Radial Electrolytic Individual styles. 1 D1 BL-B6431-TK LED 3mm RED Cololur maybe changed 3 H1,H2,H7 2SIP100 Pin Header Single Row Pads on PCB 4 H3,H4,H5,H6...
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Page 11: Overlay Component By Part Number
Overlay component by part number... -
Page 12: Overlay Assembly By Component Values
Overlay assembly by component values... -
Page 13: Soldering With Examples Of A Dry Solder Joint
Soldering with examples of a dry solder joint Always ensure that the joint is not moved whilst cooling, this will cause a matt finish. A shiny joint will be correct joint. Please ensure that you use a fine tipped soldering iron DO NOT OVERHEAT JOINTS WHEN SOLDERING... -
Page 14: Cable "Left And Right" Connections
Cable “Left and Right” connections Ring right (red cable) Tip left (white cable) Barrel signal ground Please note ! We have noticed some dodgy cables that are swopped around..always test with a cell phone app to confirm left and right. -
Page 15: Resistor Component Codes
Resistor component codes If in doubt, always check values with a multimeter... - Page 16 Diode mounting Bending a component lead Always ensure a diode is correctly Take care when bending a component lead not Inserted to the PCB or the system to damage the “die” of the component. will not work. Always use pliers to prevent undue strain on the die.
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Page 17: Capacitor Codes
Capacitor codes Please note, the capacitors for input audio are electrolytic but non polarised with the long leg as the positive known as non-polar These are part numbers C1 and C6 value 3,3 uf or also known as 3u3 Power and capacitors are polarised electrolytic, the device is marked and the long leg is always the positive These are part numbers C4 and C5 value either 220 uf or 470uf... -
Page 18: Preparing Materials
Preparing materials The first stage is to prepare all materials ready for assembly, then you can focus on the assembly, NOTE that the Lozenge tin needs to be marked carefully a similar tin to Fisherman's Friend is ideal The PCB has to be separated as required, if using a wooden enclosure, 4 screw holes are provided... - Page 19 Preparation of the tin for drilling Then apply masking tape to the tin and mark the positions of each hole, mark the hole centre 9mm from the bottom. from the bottom. Lightly centre punch each centre holes are as per the labels, 7 mm for volume and 6mm for the switch. Mark light hole as per your choice.
- Page 20 Preparation of the tin for drilling Firstly lets mark the tin, the simplest way is to mark a sheet of white paper With the tins outside dimensions on it. Then mark the matrix to drill holes. 9 mm Then apply labels to the tin and mark the positions of each hole, mark the hole centre 9mm from the bottom.
- Page 21 Pre assembly of tin before assembly Its always nice to preassemble the tin Tip 1, make tea…mark the vinyl sheet to the perimeter of the tin and apply in the tin. Then put the parts in the correct spots. Look listen and decide To see all is in order.
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Page 22: Pcb Assembly
PCB assembly The PCB is very carefully designed to allow a kit builder to assemble without errors. As it has two sizes of components, its easier to assemble in the following order, remember to keep the gold band in the same direction when assembling resistors as it makes it easier to read the components. Open the packets when you need to use them ! Start with the two 10R resistors and the two 4k7 resistors which are ½... -
Page 23: Op Amp Connections
Op Amp connections (for reference) Its nice to trace the tracks and see these connections... -
Page 24: Connect The Audio Output Jacks
Connect the audio output jacks When connecting the audio socket, take note of the tip and band connection. The tip is the left signal, check this with a aux cable and a multimeter for continuity. Connect the yellow wire to the left connections, the right wire is orange. Ensure a heat shrink is placed over the solder joint to tidy the assembly on completion. -
Page 25: Connect Cable To Controls
Connect cables to controls Switch Input Output Left gang Right gang... -
Page 26: Volume Control Connections
Volume control connections Orange is right (top gang) and (yellow is left gang) Left gang Ground connection Right gang Input from source (Audio jack) on PCB Wiper on PCB A dual gang audio taper volume control is used type A10k Heat sleeve is provided to insulate conductors before installation... -
Page 27: Now The Cables
Now the cables Use green or black for earth or ground Red for the switch Yellow for the right channel Orange for the left channel Note the header for the input and output Is marked with a dot for the right channel See H3 and H4 You will have to measure in the tin for cable lengths as per your position... -
Page 28: Led Window
LED window, drill with a 1 mm drill this to suit your taste and also enclosure Mark and drill a small 1,5 mm hole for LED above the switch allowing a small clearance... -
Page 29: Testing
Testing Before connecting the device confirm the following : All solder joints are confirmed to be in a shiny condition, or NOT dry joints Switch on confirming LED light works before connecting audio input and headphone cables ALWAYS SWITCH ON WITH THE VOLUME CONTROL AT MINIMUM TO AVOID HEADPHONES DAMAGE Download a cell phone app that shows left/right audio and plug in a aux cable to the side. - Page 30 Before closing the lid, ensure nothing fouls, fit knobs and you are good to go...
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Page 31: Op Amp Rolling
Firstly..What Is Tube Rolling? Lint audio make a range of Tube amps (in the UK, its called a valve) Simply put, tube rolling is the process of trying out a variety of different tubes in the same socket in an amplifier in order to find the one that sounds best to you. -
Page 32: Warning
WARNING AVOID LISTENING AT HIGH VOLUMES TO PREVENT HEARING LOSS The Kwela Tones will provide many hours of listening pleasure, it is supplied With a TL072 op amp, this may be improved on with different types of Op Amp thus changing the sound characteristics to suit your taste.
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