Raleigh Audio RAKK dac Mark III Extreme Preamplifier Assembly Manual

Summary of RAKK dac Mark III Extreme Preamplifier

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    Rakk dac raleigh audio k&k audio rakk dac mark iii extreme preamplifier assembly manual version 1.1 © 2010 – 2011 raleigh audio.

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    This completed extreme preamplifier has a silver face plate and knobs. A black faceplate and knobs is available. 1.

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    General information the extreme preamplifier is a semi-custom kit, which means that several standard offerings are combined to form the base, while the inputs and outputs are added as options to the base. You can choose to have from one to six inputs, which may be a mix of balanced (xlr) and single-...

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    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...

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    Table of contents general information ...................................................................................................................................................... 2 table of contents...............................................................................................

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    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. Pre-wire the printed c...

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    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 pr...

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    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” pads are not used. ...

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    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: • connect pin 4...

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    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. • connect the shorter wire to pin 15 on the power transformer. ——————————...

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    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” x 1”, one, 8” x 1” and one, 2” x 2”....

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    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. 3. Install one piece of 10” x ...

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    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...

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    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...

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    ———————————————————————————— 14.

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    ♪ 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. Locate the grey twisted pair that is connected to transformer pins b1 a...

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    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. Here are some general guidelines for mounting the jacks: • mount the jack...

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    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. However, xlr ja...

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    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 “+” pad a...

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    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...

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    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 – the longer lead is the...

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    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. • d...

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    ———————————————————————————— wire 12v power 5. Dress the 11”yellow wire close to the chassis and connect it to the “-12v” pad on the active output. ———————————————————————————— 24.

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    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. Connect the blue/black twisted pair from the left “out” ...

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    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. ———————————————————————————— 26.

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    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. • connect the associated black wire to the “com” pad on the ...

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    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...

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    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. • secure the panel with a 6-32 kep nut on the center stud only finger-tight. 7. ...

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    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 boa...

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    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...

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    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. Secure the front panel to the side panels with four kep nuts. ...

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    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. ————...

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    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 ha...

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    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...

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    Back panel parts in addition to the parts received with the analog input kit, these parts are provided part description qty back panel custom 1 ac inlet module black with three prongs 1 fuse 0.5a, 250v 5 x 20mm for 115vac 0.315a, 250v 5 x 20mm for 230vac 2 rca jack optional output jacks 0, 2, 4, 6 x...

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    Hardware list part description qty screw 4-4 x 0.375” button head 16 screw 6-32 x 0.25” button head 13 screw 6-32 x 0.5” button head 4 screw 6-32 x 0.25” phillips head 9 screw 4mm x 8mm button head 5 nut 4-40 kep nut (with star washer) 16 nut 6-32 kep nut (with star washer) 9 nut 4mm machine nut 1 w...

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    42 document version history version description 1.0 original document 1.1 (this document) update power wiring.