Summary of Contents for Raleigh Audio RAKK dac Mark III Extreme Preamplifier
- Page 1 RAKK dac K&K Audio RAKK dac Mark III Raleigh Audio Extreme Preamplifier Assembly Manual Version 1.1 © 2010 – 2011 Raleigh Audio...
- Page 2 This completed Extreme Preamplifier has a silver face plate and knobs. A black faceplate and knobs is available. ...
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Page 3: General Information
Use the soldering iron for all other components. Support RAKK dac and its associated components are produced through the joint cooperation of K&K Audio and Raleigh Audio. You may contact us with questions on constructing this kit by sending an e-mail message to david@raleighaudio.com... -
Page 4: Warnings And Cautions
Warnings and Cautions Warning — a high voltage power supply (200VDC) is required to make the kit operate properly. These voltages can be lethal. If you are not familiar with safe techniques for completing the installation of this kit with a high voltage power supply, then you should seek someone who is qualified to help you construct this kit safely. -
Page 5: Table Of Contents
Table of Contents General Information ..............................2 Table of Contents................................4 Assembly Instructions ..............................5 Pre-wire the PC boards and Power Transformer ......................6 Pre-wire the Active Output ............................6 Pre-wire the RAKK Input ............................7 Pre-wire the Power Transformer.......................... -
Page 6: Assembly Instructions
Assembly Instructions Before you start, read through the instructions completely to the end. Inventory the kit contents to become familiar with the parts and to make sure you have everything. The assembly sequence is as follows: 1. Assemble all of the printed circuit boards 2. -
Page 7: Pre-Wire The Pc Boards And Power Transformer
Prewire the PC boards and Power Transformer In the following steps, the wires should be inserted into the solder side of the board. “Preparing a wire” means to strip ⅛” of insulation from both ends of the wire and tin the ends. Because each wire has a “from” end and “to” end, and only one end is pre-wired, some pads are not wired in this section. -
Page 8: Pre-Wire The Rakk Input
3. Using a craft knife cut a gap in the trace that connects the two “external mute” pads. 4. Prepare a 24” #22 black/black twisted pair. • Connect the two wires to the two “external mute” pads. ———————————————————————————— The “Input Select” pads are not used. The “From RAKK dac”... -
Page 9: Pre-Wire The Power Transformer
Prewire the Power Transformer For the following steps, refer to the LL1683 Data sheet. ———————————————————————————— 1. Wire the transformer for your Mains line voltage: 115VAC: • Connect pin 2 to pin 12 with a #20 black wire. • Connect pin 4 to pin 10 with a #20 black wire. 230VAC: •... - Page 10 4. Wire the high voltage: • Make a twisted-pair from two pieces of #20 red wire, one 9½” long and one 9¾” long. Align the wires evenly at one end. • Connect the longer wire at the uneven end to pin 17 on the power transformer. •...
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Page 11: Panel Preparation
Panel Preparation Cut one 10” x 2” piece of damping material into two pieces: 10” x 1”. Cut another 10” x 2” piece of damping material into three pieces: Two, 8” x 1” and one, 2” x 2”. Cut the remaining 10” x 2” piece of damping material into four pieces: Two, 4”... -
Page 12: Back Panel Preparation
Top Panel Preparation 1. Place the top panel such that the inside surface of the panel faces up and the edge with the lip (front) is away from you. 2. Install one piece of 10” x 1” damping material on the inside of the top panel, centered between the vents and the lip. -
Page 13: Side Panel Preparation
Side Panel Preparation 1. Install an 8” x 1” piece of damping material centered on the inside of the left panel. 2. Install an 8” x 1” piece of damping material centered on the inside of the right panel. ———————————————————————————— Front Panel Preparation Install the two remaining 2” x 2” pieces of damping material on the inside of the front panel. •... -
Page 14: Panel Assembly
Panel Assembly Bottom Panel Assembly Steps preceded by a “note” (♪) deal with components which must be oriented properly. TIP – To ease the alignment of the mounting holes with standoffs, slightly loosen the standoffs from the board, install the screws through the bottom panel into the standoffs and then re-tighten the standoffs. - Page 15 ————————————————————————————...
- Page 16 ♪ Mount the Active Output board 2. Mount the Active Output board in its location in the center of the chassis. Orient the board such that the power input pads are closest to the power transformer. Do not secure the board yet. 3.
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Page 17: Back Panel Assembly
Back Panel Assembly You may have as few as two pairs or as many as six pairs of input jacks. You may have as few as one pair or as many as three pairs of output jacks. The jacks may be RCA jacks, XLR jacks or a mix of the two. - Page 18 This example of a back panel has three pairs of RCA inputs and two pair of RCA outputs. ———————————————————————————— Wire the Input Jacks to the RAKK Input board Each input jack will be individually connected to the RAKK Input board so there is no common input grounding on the panel.
- Page 19 7. Now would be a good time to personalize the jumpers on the RAKK Input board if you haven’t already done so. Refer to the instructions in the RAKK Input manual. 8. Connect the twisted pair from each input jack to the “IN” pads on the RAKK Input board. Solder the blue (orange) wire to the “+”...
- Page 20 Wire the output jacks: Even though you may have several pairs of output jacks of different types, they are electrically a single pair of outputs. The multiple pairs of output jacks are wired in parallel. Use orange/black for the right channel and blue/black for the left channel. Observe the labeling on the RCA/XLR (Gnd/Lift) switch.
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Page 23: Front Panel Assembly
Front Panel Assembly Suggestion: You may want to place a towel on your work surface to ensure that you don’t scratch the panel. ———————————————————————————— 1. Notice that the Power-On LED has one lead that is longer than the other. This identifies the functions of the leads –... -
Page 24: Final Assembly And Wiring
Final Assembly and Wiring ———————————————————————————— Wire the Bottom Panel to the Back Panel ———————————————————————————— Lay the back panel down adjacent to the bottom panel where it will be installed. • Dress the yellow 12V wire along the bottom edge of the panel towards the power connector. • Dress all of the other wires along the bottom edge of the panel towards the opposite end from the power connector. - Page 25 ———————————————————————————— Wire 12V Power 5. Dress the 11”yellow wire close to the chassis and connect it to the “-12V” pad on the Active Output. ————————————————————————————...
- Page 26 Wire the Line Inputs 6. Connect the orange/black twisted pair from the right “OUT” pads on the RAKK Input board to the right “Line Input” pads on the Active Output. Connect the orange wire to the “R+” pad and the black wire to the “R-” pad. 7.
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Page 27: Wire The Bottom Panel To The Front Panel
Wire the Bottom Panel to the Front Panel Lay the front panel down adjacent to the bottom panel where it will be installed. ———————————————————————————— Trim the lengths of the wires as needed in the following steps. ————————————————————————————... - Page 28 Wire the Volume Control 1. Connect the twisted pairs from the “volume control” pads on the Active Output board to the volume control as follows: • Connect the blue wire to the tab extending from the switch wafer closest to the front panel.
- Page 29 Wire the Select Switch 2. Connect the green wire from the ground buss to the “com” pad on the Analog Select board. ———————————————————————————— Wire the Power Switch The power switch has four terminals. These are two pair that will be used in parallel, so each wire will be connected to two terminals.
- Page 30 Mount the Front Panel 6. Mount the front panel onto the bottom panel. • Remove the plastic covers from the studs now. • The stud in the center bottom of the front panel fits into the hole in the lip of the bottom panel.
- Page 31 8. Dress the ribbon cable to the rear of the unit and then towards the center 9. Plug the ribbon cable into the connector on the RAKK Input board such that the cable goes toward the center of the board. The cable may be folded back upon itself so that the cable will exit away from the end of the board as shown in the picture below.
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Page 32: Assemble The Panels
Assemble the Panels The back panel has been temporarily mounted on the bottom panel so that the two panels could be wired together. Likewise, the front panel has been temporarily mounted on the bottom panel. You will now permanently mount and adjust all of the panels so that they fit together nicely. You will tighten the screws in a specific order. - Page 33 Position the Front panel 1. Tighten the KEP nut in the middle of front panel while lifting the front panel so it contacts the tops of the mounting holes. This ensures that it's straight with respect to the shelf it will be sitting on. 2.
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Page 38: Final Adjustments
Final Adjustments Adjust the Constant Current Sources The adjustments that you are about to make on the Active Output board interact. Therefore, the first time you may have to alternate adjustments to get them in range. ———————————————————————————— 1. Install a 6N6P tube in locations V1 and V2. ————————————————————————————... -
Page 39: Final Assembly
Final Assembly 1. Position the top panel on the top of the unit and secure with nine 6-32 x ¼” Phillips head screws. Tighten these screws. ———————————————————————————— 2. Install the knobs. Align the knobs and tighten the setscrews using a 1.5mm. hex wrench. The power-on switch and volume control have 6mm shafts while the select switch has a ¼”... -
Page 40: Parts List
Parts List Circuit kits Refer to the parts list for each of these kits. The following kits are provided. • Analog Input • Active Differential Output Extreme Kit Contents In addition to the parts in the circuit kits and options listed above, these parts are provided: e parts are provided: Chassis and Front Panel Parts Chassis and Front Panel Parts... - Page 41 Back panel Parts In addition to the parts received with the Analog Input kit, these parts are provided Part Description Back Panel custom AC inlet module Black with three prongs Fuse 0.5A, 250V 5 x 20mm for 115VAC 0.315A, 250V 5 x 20mm for 230VAC RCA jack Optional output jacks 0, 2, 4, 6...
- Page 42 Hardware List Part Description Screw 4-4 x 0.375” button head Screw 6-32 x 0.25” button head Screw 6-32 x 0.5” button head Screw 6-32 x 0.25” Phillips head Screw 4mm x 8mm button head 4-40 Kep nut (with star washer) 6-32 Kep nut (with star washer) 4mm machine nut Washer...
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Page 43: Document Version History
Document version history Version Description Original document (This document) update power wiring...
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