UralTone 80B compressor building instructions

[product ids="32472"]

UralTone 80B - BOM - Bill of materials

Check all the parts

Always check first that all parts are included in the delivery. If you find any problems please contact us by email or through the "contact us" form on the pages. Note that the components may look slightly different than in the photos. Also, note that the voltage specs of the parts may be higher than what is listed. Read all the notes at BOM (bill of material) carefully.

Building the pedal

Follow the order in which the images below are assembled. We try to keep component manufacturers and types the same, but sometimes we have to change the manufacturer or model of a part due to poor availability. So if a part is a slightly different color or higher voltage rating, all is good, each component has the required values marked on the side of the part.

Solder jumper wire to R22. Note: You'll get some wire if soldering some resistor on board.

It is a good idea to start with low / smaller parts, so that the parts are pressed against the surface of the pcb when they are soldered to the board and the board is turned over on a table or similar surface. Start by populating the resistors on a pcb. Resistors are marked R1, R2, etc. Resistor values are marked with colored rings. To interpret these, see the table provided with the kit. The correct values can also be measured or compared to the color rings in the image above. It doesn't matter the direction in which the resistors are installed, but for readability, it's a good idea to install them in the same direction, depending on the printing on the disc.

Solder diodes (D1, D2...) to pcb. Note the mounting postition. Diode has tripe printed on the end of the package. The pcb has same figure silk screened.

Solder the sockets for the IC-circuits. Note the notch on the socket. Align this according the silkscreen on board.

Solder the Ceramic and Plastic Film Capacitors (C1, C2…) in place. The values of the capacitors are usually denoted so that the first two digits indicate the value of the first two digits. The third indicates the number of zeros. For example, 471 is 470pF, 472 is 4700pF, or 4.7nF. The installation direction of these parts does not matter.

Install the electrolytic capacitors on the plate. Note the mounting direction of the part, the printed stripe on the side of the part marking the negative terminal of the capacitor corresponds to the white semicircular pattern printed on the circuit board.

Solder the transistors (Q1, Q2 ...) to the board. The shape of package matches the silkscreen on pcb. There's two types of transistors used on circuit, refer BOM for designator / type.

Potentiometrin ohjainnasta poistettu

Next solder the potentiometers to board. The middle one, B100k on below needs the guide pin to be removed. This breaks off with pliers.

Solder the potentiometers to the pcb. It is advisable to solder the potentiometer middle foot first and then check that it is on the surface of the plate and straight. When the position is correct, solder the outermost pins.

Solder the DC jack.

Insert the U1 and U2 in the sockets. Bend the pins slightly inwards for perfect fit to the socket.

Solder short wires to jack and pcb as above.

Press the foot switch into it's pads. It's bit tight but using some careful force it will drop in. Note the notch on the the switch threads. This is aligned towards top. Screw nut to foot switch and match the height of it to same plane as the potentiometers. By this the board will be in same plane with enclosure top. Do not solder the switch yet.

Drop the led in its pads too. Note the polarity. Bend the pins bit outwards to secure the led. Do not solder the led yet.

Fit the pcb in the enclosure like on the picture. Note the jack fitting position. Turning the jack as pictured keeps the tip contact out of the open components. It's good practice to check the tip contact won't touch the led or other parts by inserting plug in jacks.

Before soldering the foot switch it's possible to adjust the nut height of the foot switch to adjust the board to same plane as the enclosure top. Adjust the nut if needed. Fit the potentiometer and foot switch nuts.

If you have ordered the optional front panel, fit in under the nuts of the potentiometers and footswitch.

When pcb is it's final position, solder the footswich, led, etc. Kit is almost ready now.

Tämän kuvan alt-attribuutti on tyhjä; Tiedoston nimi on 951-UT-80B-FINAL-1-750x750.jpg

Fasten the potentiometer knobs of your taste and close the lid on back of the effect. You're all set up!