AkitikA PR-101 Assembly Manual
Stereo preamplifier
Hide thumbs
Also See for PR-101:
- Assembly manual (68 pages) ,
- Assembly manual (53 pages) ,
- Assembly manual (25 pages)
Table of Contents
Advertisement
Quick Links
Download this manual
See also:
Assembly Manual
Advertisement
Table of Contents
Related Manuals for AkitikA PR-101
Summary of Contents for AkitikA PR-101
- Page 1 PR-101 STEREO PREAMPLIFIER Headphone Amp ASSEMBLY MANUAL © 2015, 2016 AkitikA LLC All rights reserved Revision 1p9 May 6, 2016 Page 1 of 21...
-
Page 2: Table Of Contents
Install the Signal Wires....................12 Signal Input Wires ....................12 Signal Output Wires....................13 Section 5 – Install the Headphone Amp into the PR-101 ..........14 Mechanical Installation....................14 Dismount the tone/volume board................14 Mount the Headphone Amp Board ................15 Wiring the Headphone Amp In.................. -
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 ..... 11 Figure 5-Tone/Volume dismounted to make room to install Headphone Amp.... -
Page 4: Section 1: About This Manual
PCB. Project Overview The project consists of the following steps: 1. Building the Headphone Amp circuit board. 2. Choosing a few load options based on your headphones. 3. Installing the Headphone Amp into a PR-101 preamplifier. Page 4 of 21... -
Page 5: Important Safety Notes
60/40 Rosin Core solder. Akitika LLC’s liability shall in no event exceed the cost paid to Akitika LLC for the kit. Page 5 of 21... -
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 Electrolytic (Polarized) Capacitors
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. Polarized Capacitors (watch polarity) Designation Value Rating, Marking Done? () 10 uF Electrolytic capacitor, 10 µF 35 V, radial leads 10 uF Electrolytic capacitor, 10 µF 35 V, radial leads 10 uF... -
Page 11: 12 Volt Power Wires
12 Volt Power wires Locate the thicker gray jacketed cable. Note that there is also thinner gray jacketed cable. Find both and compare them to make sure you really have the thicker gray jacketed cable. Now that you’re sure you have the thicker gray jacketed cable, beneath the gray jacket you’ll find: ... -
Page 12: Install The Signal Wires
Install the Signal Wires Signal Input Wires The wires in this section will bring signal into the inputs of the headphone amp. You will use the thinner of the two types of gray jacketed wire for these steps (All but a few inches of the thicker gray jacketed wire was used in the previous power wiring steps) Signal Wiring (Right Channel Input Connections) Task... -
Page 13: Signal Output Wires
Signal Wiring (Left Channel Input Connections) Task Done? () Cut a 4” length of shielded cable that will be used for the left 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 14: 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 15: 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 16: Power 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. Please note the following 1. -
Page 17: Reinstall The Tone/Volume Board
supply PCB into the PCB hole marked P12 on TB2. Solder from the component side. Insert black wire of Red/black pair into the component side of the power supply PCB into the PCB hole marked N12 on TB2. Solder from the component side. -
Page 18: Section 6: Tests And Final Assembly
Connect AC power to the PR-101 and power it up. Be careful as potentially lethal voltages are accessible in the PR-101 any time that it is powered with the lid removed. Check the plus and minus 12 volt supplies to assure that they are still within tolerance, that is, within +/- 0.6 Volts of 12 Volts DC. -
Page 19: Revision Notes
Frequency Response: -3 dB at 2 Hz and 200 kHz (measured from the CD input to a 32 Ohm load on the headphone output) A-weighted SNR - >100 dB Maximum output-approximately 2.5 volts RMS into 32 Ohms ... -
Page 20: Appendix 1 - Shielded Cable Preparation
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 21 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.
Need help?
Do you have a question about the PR-101 and is the answer not in the manual?
Questions and answers