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Magnum v1.0 

 

Manufacturer and product names are mentioned solely for circuit identification, and where applicable their trademarks are the 
property of their respective owners who are in no way associated or affiliated with the author. No cooperation or endorsement 

is implied.

 

Troubleshooting 

All PCB’s have been

 100% factory e-tested and out of every batch I receive I build an effect to double 

check, so there should not be a connection problem on the PCB itself. 

The board is not working (at all), what now?  

 

Check if your 9V is plugged in correctly (and/or soldered correctly on the board). 

 

Check that you oriented 

the capacitors, IC’s ,transistors and diodes the right way.

 SMF, MKT 

and ceramic capacitors as well as resistors do not need to be oriented.  

 

Check if you used the correct values of the components. For resistors you can look here: 

http://www.diyaudioandvideo.com/Electronics/Color/

  

 

Double and triple check your soldering! A loose or cold solder can be really bad for your 
board. 

 

Replace the IC, it might be defective. Before doing that first unplug the 9V and wait for 5 
seconds. 

 

Check that you have good/high grade components. A lot of Chinese sourced parts are fakes 
(especially high end opamps, vintage diodes and transistors) so be careful that you source 
your parts from reliable suppliers. 

 

 

Содержание Magnum

Страница 1: ...Magnum Building instructions V1 0 ...

Страница 2: ...n or endorsement is implied 2 Table of contents Components 3 PCB layout 3 Building sequence 4 Modifications 5 Diodes and Op amp 5 Clipping Diode Configurations 5 Off board wiring 6 Troubleshooting 7 Schematic 8 Read this entire manual thoroughly before you start building the effect Especially the modification part Decide before building the effect which mods you want to try so that you do not need...

Страница 3: ...ima D11 1N5817 C5 470n SMF MKT Wima DIP1 DIP2 C6 4u7 Electrolytic 25V IC1 JRC4558 C7 47n SMF MKT Wima IC2 LT1054 C8 2u2 Electrolytic 25V P1 A250k Gain C9 10u Electrolytic 25V P2 A25k Bass C10 47u Electrolytic 25V P3 B10k Treble C11 100n SMF MKT Wima P4 B100k Volume C12 47u Electrolytic 25V R1 1M 1 metalfilm D1 1N34A MLCC Ceramic R2 470k 1 metalfilm D2 1N914 Germanium Diode R3 4k7 1 metalfilm D3 1N...

Страница 4: ...ed a 20 SIL break off the sockets and solder them to the board Note Glass diodes are fragile Do not expose them to heat for too long or they ll break Start by soldering the jumper if needed resistors and then the diodes if not socketed Solder the IC socket next and then the small SMF MKT capacitators the DIP switch the electrolytes and finish with the C3 silver mica If you want to use a regular 22...

Страница 5: ...e any dual op amp of your liking Try the JRC4558 JRC4559 AD712 MC1458 TL072 OPA2134 OP275 etc etc Clipping Diode Configurations There are really a lot of ways to configure the diodes in the soft clipping section of this effect There are 2 diode sections that you can load with whatever 4 diode combination you like The Dip switch is added so that you can switch between symmetrical and asymmetrical c...

Страница 6: ...which on a potentiometer You can break off the pin I marked with the yellow circle with a small pair of pliers SW1 is a regular DP3T on off on switch with solderlugs and SW2 is a PCB mount version SPDT switch Place the potentiometers and switches in the predrilled enclosure and then insert the PCB Once the PCB fits nicely and is not touching the enclosure solder the potentiometers and switches to ...

Страница 7: ...tly and or soldered correctly on the board Check that you oriented the capacitors IC s transistors and diodes the right way SMF MKT and ceramic capacitors as well as resistors do not need to be oriented Check if you used the correct values of the components For resistors you can look here http www diyaudioandvideo com Electronics Color Double and triple check your soldering A loose or cold solder ...

Страница 8: ...s are mentioned solely for circuit identification and where applicable their trademarks are the property of their respective owners who are in no way associated or affiliated with the author No cooperation or endorsement is implied 8 Schematic ...

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