Oakley 3031 manual

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18W one for this purpose. I use an ordinary Antex 25W iron with a Variac power supply running at 205V. This seems to work well for me.

All resistors, apart from the special PTC, should be flat against the board surface before soldering. It is a good idea to use a ‘lead bender’ to preform the leads before putting them into their places. I use my fingers to do this job, but there are special tools available too. Once the part is in its holes, bend the leads that stick out the bottom outwards to hold the part in place. This is called ‘cinching’. Solder from the bottom of the board, applying the solder so that the hole is filled with enough to spare to make a small cone around the wire lead. Don’t put too much solder on, and don’t put too little on either. Clip the leads off with a pair of side cutters, trim level with the top of the little cone of solder.

Once all the resistors have been soldered, quickly check them ALL again. Make sure they are all soldered and make sure the right values are in the right place.

The diodes can be treated much like resistors. However, they must go in the right way. The cathode is marked with a band on the body of the device. This must align with the vertical band on the board. In other words the point of the triangular bit points towards the cathode of the diode. There are three types of diodes used in this project. Most are ordinary signal diodes, the 1N4148. You have eight bigger black 1N4004 types. And two zener diodes. When all the diodes are in place, double check all are pointing the right way.

LED4 and LED6 are mounted vertically into the board. It is a good idea to let them stand off from the surface of the board a bit. I poke the leads through, and then with about 4mm left between the bottom of the LED package and the board, I cinch the leads to hold them in place when the board is upside down. Be careful to get them the right way around.

The polyester capacitors are like little blue or red boxes. Push the part into place up to the board’s surface. Little lugs on the underside of the capacitor will leave enough of an air gap for the water wash to work. Cinch and solder the leads as you would resistors.

The smaller electrolytic capacitors are very often supplied with 0.1” lead spacing. My hole spacing is 0.2”. This means that the underside of these radial capacitors will not go flat onto the board. This is deliberate, so don’t force the part in too hard. The capacitors will be happy at around 0.2” above the board, with the legs slightly splayed. Sometimes you will get electrolytic capacitors supplied with their legs preformed for 0.2” (5mm) insertion. This is fine, just push them in until they stop. Cinch and solder as before. Make sure you get them in the right way. Electrolytic capacitors are polarised, and may explode if put in the wrong way. No joke. Oddly, the PCB legend marks the positive side with a ‘+’, although most capacitors have the ‘-’ marked with a stripe. Obviously, the side marked with a ‘-’ must go in the opposite hole to the one marked with the ‘+’ sign. Most capacitors usually have a long lead to depict the positive end as well.

The bigger 1000uF capacitors should be soldered flush onto the board using no-clean or conventional solder. On no account must these two parts be put in the wrong way.

The transistors all look alike apart from the big TIP31. So look very carefully before inserting each device. Match the flat side of the device with that shown on the PCB legend. Push the transistor into place but don’t push too far. Leave about 0.2” (5mm) of the leads visible

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Contents Penrith SuperBassLine User’s GuideIntroduction Page Page Reading the front panel for the 3031 from left to right Operating InstructionsVelocity CV Approx Midi value Slide Accent Components Page Page Dpdt SpdtParts List ResistorsPTC Discrete Semiconductors CapacitorsTrimmers SwitchesIntegrated Circuits PotsPopulating the PCB SW4Miscellaneous Page 2SC1583 2SC3381 Mounting the Pots, LEDs and Switches Housing your unit Page Gate MOD VEL BND KBD Slide Using the tbDACTbDAC 3031 Agnd DgndCV, Gate and Audio Connections All those Trimmers Final Comments

3031 specifications

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