AkitikA PR-102 Assembly Manual
  1. Manuals
  2. Brands
  3. AkitikA Manuals
  4. Amplifier
  5. PR-102
  6. Assembly manual

AkitikA PR-102 Assembly Manual

Headphone amp
Hide thumbs Also See for PR-102:
Table of Contents

Advertisement

Quick Links

Download this manual
PR-101 /PR-102 STEREO PREAMPLIFIER
Headphone Amp
ASSEMBLY MANUAL
© 2015-2020 AkitikA LLC
All rights reserved
Revision 2p01
May 3, 2020
Page 1 of 24

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the PR-102 and is the answer not in the manual?

Questions and answers

Related Manuals for AkitikA PR-102

Summary of Contents for AkitikA PR-102

  • Page 1 PR-101 /PR-102 STEREO PREAMPLIFIER Headphone Amp ASSEMBLY MANUAL © 2015-2020 AkitikA LLC All rights reserved Revision 2p01 May 3, 2020 Page 1 of 24...

  • Page 2: Table Of Contents

    12 Volt Power wires....................11 Install the Signal Wires ....................12 Signal Input Wires – PR-101 Preamp ............... 12 Signal Input Wires – PR-102 Preamp ............... 13 Signal Output Wires ....................14 Section 5 – Install the Headphone Amp into the PR-101 ..........16 Mechanical Installation ....................

  • Page 3: Table Of Figures

    Table of Figures Figure 1-Empty the components into a soup bowl ............. 6 Figure 2-Silk screen shows Headphone Amp component locations ........6 Figure 3-Locating pin 1 of the IC and pin 1 of the PCB............. 9 Figure 4-Close-up showing installation of -12V, GND, and +12V power wires ..... 12 Figure 5-Tone/Volume dismounted to make room to install Headphone Amp....

  • Page 4: Section 1: About This Manual

    Section 1: About This Manual This manual gives the information needed to build and use the Headphone Amp for either Akitika LLC’s PR-101 Stereo Preamplifier or PR-102 Stereo Preamplifier. Who Should Attempt this Project? You can build this kit if you can: 1.

  • Page 5: Important Safety Notes

    Warranty With the exception of fuses, Akitika will replace for free any parts of a correctly assembled product that fails within one year of the date of purchase when the equipment has been used in home stereo applications. It is the responsibility of the kit builder to install the replacement part(s).

  • Page 6: Section 2: Kit Building Hints

     A lead-bending jig can make for quicker, neater assembly. It’s certainly not necessary.  Is something in this manual confusing? Does something look wrong? Send your questions by email to dan@akitika.com. You’ll help yourself and everyone who builds the kit. Section 3: Building the Headphone Amp This section details the process of building the Headphone Amp circuit board.

  • Page 7: Component Order

    Component Order You’ll notice that the component designations in the directions don’t go in order. We have grouped them so that all components with the same value appear together. This makes assembly easier. You’ll find in the parts kit that similar parts, e.g. 3 1K resistors, are typically (though not always) taped together.

  • Page 8: Selected Resistor Installation

    Selected Resistor Installation Depending on the type of headphones you have, you will set the gain of the headphone amp differently. Basically, there are two types of headphones out there:  Modern headphones have low impedance, typically 32 Ohms, but could be as low as 18 Ohms.

  • Page 9: Install The Small Non-Polarized Capacitors

    Install the small non-polarized capacitors The capacitors you’ll install in this section can be installed in either orientation. Small Value COG dielectric Capacitors Designation Value Rating, Marking, Description Done? () 33 pF NPO, 33J, disc capacitor, 5% tolerance 33 pF NPO, 33J, disc capacitor, 5% tolerance Install the bypass capacitors The 0.1 uF bypass capacitors are not polarized, and can be inserted in either orientation.

  • Page 10: Install The Integrated Circuits

    Install the Integrated Circuits Integrated Circuits (watch pin 1 location) Designation Description Done? () NE5532 dual opamp, 8 pin dip package NE5532 dual opamp, 8 pin dip package NE5532 dual opamp, 8 pin dip package NE5532 dual opamp, 8 pin dip package Install the Electrolytic (polarized) Capacitors Please note that C15 has a 50 Volt rating, while the rest of these capacitors have a 35 volt rating.

  • Page 11: 12 Volt Power Wires

    12V ground wire installation Done? () Insert one end of the tinned ground wire from the bottom of the Headphone Amp PCB into the center TB5 hole, marked GND and solder it on the top side. The other side of this wire will be connected in a later step. 12 Volt Power wires Locate the thicker gray jacketed cable.

  • Page 12: Install The Signal Wires

    This section applies to installing the headphone amp into the PR-101. If you are installing the headphone amp into a PR-102, then skip ahead to the next section. The wires in this section will bring signal into the inputs of the headphone amp. You will use the thinner of...

  • Page 13: Signal Input Wires - Pr-102 Preamp

    PCB, into the Ground of TB2. Solder it on the solder side. Signal Input Wires – PR-102 Preamp This section applies to installing the headphone amp into the PR-102. If you are installing the headphone amp into a PR-101, then you should move on to the next section.

  • Page 14: Signal Output Wires

    Signal Wiring (Right Channel Input Connections) Task Done? () Cut a 5.5” length of shielded cable that will be used for the right channel connections. This is the thinner, gray jacketed cable. Prepare the ends as shown in Appendix 1. Reserve the outer jacket removed when you exposed the ends.
  • Page 15 ends. Twist and tin the ends. Insert one end of the black wire into the GND terminal of TB3 from the component side. Solder it on the Solder Side. Cut a 3” length of red 22 AWG wire. Strip ¼” of insulation from both ends. Twist and tin the ends.

  • Page 16: Section 5 - Install The Headphone Amp Into The Pr-101

    Section 5 – Install the Headphone Amp into the PR-101 Make sure that the power is disconnected from the PR-101 before proceeding with the installation. Figure 5-Tone/Volume dismounted to make room to install Headphone Amp Mechanical Installation Please protect the paint finish on your PR101. Be sure to put a towel onto your work surface prior to laying your PR101 on your work bench.

  • Page 17: Mount The Headphone Amp Board

    Mount the Headphone Amp Board Task Done? () Install two female/female standoffs into the chassis, onto the threaded studs next to the front of the chassis. Fasten the third female/female standoff onto the stand-alone hole in the Headphone Amp PCB using a 4-40x1/4” Phillips screw. The standoff goes on the solder side, and the screw installs from the component side.

  • Page 18: Power Wiring

    Figure 6-Headphone Jack Wiring Figure 7-Headphone Amp Installed with jack wiring completed Power Wiring You can select any of the unused +/-12 terminal sets on the power supply board. We recommend using TB2. If you followed the PR-101 Assembly instructions, TB3 and TB4 are already used.

  • Page 19: Reinstall The Tone/Volume Board

    Signal Connections PR-101 This section covers installation of the headphone amp kit into the PR-101. If you have a PR-102, then skip ahead to the next section. In this section, you’ll connect the shielded cables from the headphone amp to the existing outputs of the tone/volume board.

  • Page 20: Signal Connections Pr-102

    Solder both drain wires to TB4 GND LEFT on the tone volume board. Signal Connections PR-102 This section covers installation of the headphone amp kit into the PR-102. If you have a PR-101, then skip ahead to the next section.

  • Page 21: Section 6: Tests And Final Assembly

    Section 6: Tests and Final Assembly Reconnect the 10-pin control cable (PR-101, 14 pin for PR-102) that runs from the controller board to the tone/volume board. Connect AC power to the PR-101/102 and power it up. Be careful as potentially lethal voltages are accessible in the PR-101/102 any time that it is powered with the lid removed.

  • Page 22: Revision Notes

    BC547 operating in reverse performed flawlessly. Revision 1p10 corrects a typo about ground and signal connections on page 17. Revision 2p00 adds directions for installation into a PR-102 preamp. Page 22 of 24...
  • Page 23 Appendix 1 – Shielded Cable Preparation This section tells how to prepare the end of a shielded cable. 1. Cut the shielded cable to the overall required length. 2. Use a utility knife with a new, sharp blade to cut the plastic jacket of the shielded cable 1”...
  • Page 24 5. Separate and twist the drain wire. 6. Peel back and remove the foil. Remove the plastic wrap from the red and black wires. The drain (bare wire), red, and black wires are exposed now that gray insulating jacket, foil shield, and plastic over-wrap have been removed. 7.

This manual is also suitable for:

Pr-101

Table of Contents