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10.2

Wiring the PTDAC4-1 Transformer to the Filament Board

Now let’s look at the dedicated filament transformer PTDAC4-1.
This transformer has 4 secondary’s that are all 8V AC, one of them is a 4A version while the

others are 2A versions. The 2A versions all go to the Super Regulator Board on the digital side

while the 4A one goes to the Filament PCB.
Start by twisting the wires together on each 8v AC pair.
We are only going to be using the Brown and Brown/White for the moment. Route these wires

over to the Filament Board and solder from under the board to the input of the Filament PCB.

These wires will connect to

the FILAMENT Board

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Summary of Contents for DAC5.1 Signature

Page 1: ...DAC5 1 Signature Construction Manual Version 2 0 Jan 2016 audionotekits rogers com 1 613 822 7188 ...

Page 2: ...ng the White Grey wires 14 7 3 4 Connecting the Black wires 15 7 3 5 Connecting the Black Grey wires 16 7 3 6 Connecting the jumper cables 120V ONLY 17 7 3 7 Connecting the jumper cables 240V ONLY 18 7 3 8 Connecting the PCB to the Rocker switch 19 7 3 9 Connecting the Rocker switch to the IEC 20 7 3 10 Connecting the IEC s to the ground 21 7 3 11 Final schematics of the 120V and 240V circuits 22 ...

Page 3: ... THE 5U4G EH TUBE IN POSITION IN THE 8 PIN SOCKET 57 12 DIGITAL BOARD 59 12 1 CONNECTING THE COAXIAL CABLE FROM SPDIF TO THE CON1 PORT 60 12 2 MOUNTING THE BOARD INTO THE CHASSIS 61 12 3 WIRING TO THE SUPER REGULATOR BOARD 67 13 ANALOG LINE BOARD 69 13 1 INSTALLING THE JUMPERS 72 13 2 INSTALL THE COMPONENTS 73 13 2 1 AudioNote Tantalum Resistors 73 13 2 2 Valve Bases 74 13 2 3 4 x 470uf 75 13 2 4 ...

Page 4: ...E OUTPUT TRANSFORMER SECONDARY S 89 18 FINAL CHECKS DAC5 1 91 18 1 POWER UP TESTING 91 19 INSTALLING THE ROTARY ON OFF SWITCH OPTIONAL 92 19 1 FRONT AND REAR FACEPLATES 95 20 FINAL THOUGHTS 96 21 DAC5 1 APPENDIX 97 ...

Page 5: ...p guide you through each step of the assembly process with as much detail and clarity possible To facilitate the build process the manual has been divided into several chapters each focusing on a separate aspect of the system follow through the chapters in order and we guarantee not only a problem free experience but a pleasant time doing so If you are new to building kits or if at any time you fe...

Page 6: ...est during the 2000 s with development assisted by AudioNote engineering AudioNote parts were used throughout the kits depending on the various levels and budgets By 2013 ANK AudioKits had a strong product range covering all the areas of two channel audio Single Ended 300B product line EL34 EL34 classAB and single ended product line Digital to Analog Converters Pre Amplification Phono stages and A...

Page 7: ...ion with wet Sponge Lead Solder with Tin Silver We highly recommend using Leaded solder with some silver content on the build You can use Lead free ONLY if you are experienced using it and confident Lead free solder requires a higher melting temperature and thus is more difficult to use We don t recommend unleaded solder for first time builders 3 ...

Page 8: ...ed work area where you can work on the kit on a regular basis Try not to do too much in one sitting be sure to review your previous work before moving on to make sure everything is correct Try to work a little bit each day on the kit if you start to feel tired take a rest If you have any questions please contact audionotekits rogers com 4 ...

Page 9: ...ystem 5 1000th or 50 1000th 1 inch inch Familiarize yourself with some of the hardware in the kit II The screws will be called M3 or M4 and this is the diameter of the shaft The length of the shaft will be in millimeters so you would need an M4 screw 16mm and then the option is a PAN head which is a round spherical head or a COUNTERSUNK or FLAT head This would be used when a screw head needs to be...

Page 10: ...First of all you can measure resistors much easier than reading the color codes on the side the color codes with practice can also be a good way but the multimeter in OHM mode is the fastest way for a new builder and an experienced one Tool Multimeter 5 4 Soldering We suggest you practice your soldering before embarking on the kit feel free to request practice parts with your kit so that you can p...

Page 11: ...n a 300B amplifier is typically 425v DC so when you measure from the high voltage point to any ground in the circuit even the chassis you will measure 425v DC The other type of voltage is AC voltage this is basically a voltage that is constantly changing in the form of a SIN wave The filament voltages on an EL34 are 6 3V AC or alternating voltage With your handy voltmeter you can measure DC or AC ...

Page 12: ...2009 the DAC3 1 was launched where we moved to the transformer coupled output stage In 2011 based on customer demand and feedback the DAC4 1 was launched and it became ANK s most successful product to date also launching the triple C core output transformers Since 2011 we have been looking at DAC architectures and trying to track the ever evolving industry We settled on architecting and developing...

Page 13: ...n plan accordingly Below is our latest version chassis Figure 1 we have drilled a few holes to accommodate new layouts for the mains and chokes 7 1 Install the Feet The 4 large feet will be installed in the corner holes of the chassis Use the M4 20mm Pan screws provided with washers and secure with the nut on the inside of the chassis Figure 1 Latest Chassis 9 ...

Page 14: ...substantial chokes This highly sophisticated SHUNT power supply is comprised of the following Mains transformers chokes PCB s and SHUNT resistor Mains for HT PTL4 Mains for Filaments PTDAC4 1 Choke 1 CH12H12 Choke 2 CH9H12 Choke 3 CH5H45 10K 50W SHUNT resistor Filament board to supply Line board filament supplies DAC5 1 Power Supply PCB 10 ...

Page 15: ...rs positioned into place and make connections for the IEC Rocker Switch and Mains primary sections This is where the wall electricity will be coming into the DAC and into the primary of the dual Mains transformers Mains for HT PTDAC4 1 Mains for Filaments PTL4 11 ...

Page 16: ...on and Rocker section prior to securing these into place just place them in their approximate location 7 3 1 Securing the PCB onto the chassis You will notice in your IEC kit bag you will find a rectangular PCB as shown in Figure 2 below We call this the IEC PCB and we will be connecting the wires from the primary of the mains to this board Go ahead and secure this PCB to the rear of the chassis u...

Page 17: ...tom of the board You might have your own system but that should be the best way to go Obviously you will want to make these connections while the Board is NOT secured to the rear of the chassis We would also recommend that you solder on the top as well make sure that you leave 1 2mm of room for the exposed tinned wire to be visible so that the solder will stick to it A common beginner mistake woul...

Page 18: ...7 3 3 Connecting the White Grey wires Figure 4 White Grey Wires to PCB Once you have the first two mastered then try with the White grey wires as shown above 14 ...

Page 19: ...7 3 4 Connecting the Black wires Figure 5 Black Wires to PCB Followed by the Black wires 15 ...

Page 20: ...7 3 5 Connecting the Black Grey wires Figure 6 Black Grey wires to PCB And finally the black grey wires 16 ...

Page 21: ...f the IEC strip configured we are now going to put in the jumpers required for 120V operation As you can see in Figure 7 you will solder an 18g wire from the white to the White Grey pad then also do a Black to Black Grey pad NOTE This step is only for 120V see next step if you are running a 240V system 17 ...

Page 22: ...gure 8 Jumper placement for 240V ONLY For 230V or 240V operation just position the one wire as shown between the White Grey and the Black pads as seen in Figure 8 NOTE This step is only for 240V see previous step if you are running a 120V system 18 ...

Page 23: ...ween 120V and 240V are the only differences between the two world voltages Next take the supplied wire with CRIMP on the end found in the IEC kit bag and wire from the top corner of the WHITE section and connect to the rocker switch Do the same with the other crimp wire to the bottom of the IEC PCB in the Black Grey section 19 ...

Page 24: ...own and connect between the Rocker Switch and the IEC plug You will notice there is a flat side to the CRIMP and a rounded side When connecting to the Rocker Switch make sure the FLAT side is facing the center of the Rocker Switch It doesn t really matter but gives you a little more room for inserting the crimped wire on the Rocker Switch 20 ...

Page 25: ...f the wire Just trim the insulated wire at the end exposing some wire then TIN this and cut the tinned wire to about of an inch or whatever you feel is comfortable for then inserting into the GROUND lug Solder this ground lug to the wire and do this for each Mains transformers View next page for the final schematics for the 120V and 240V circuits double check your results before moving on 21 ...

Page 26: ...7 3 11 Final schematics of the 120V and 240V circuits Figure 12 120V circuit Final Figure 13 240V circuit Final 22 ...

Page 27: ...Figure 14 The PCB in position and the prepared wires attached to the rocker and IEC section Take a deep breath the IEC section is complete 23 ...

Page 28: ...formers into the chassis with the 4 M4 screws provided You can position the PCB s onto the chassis and it should look like the above pic Mains for HT PTL4 Mains for Filaments PTDAC4 1 Choke 1 CH12H12 Choke 2 CH9H12 Choke 3 CH5H45 10K 50W SHUNT resistor Filament board to supply Line board filament supplies DAC5 1 Power Supply PCB 24 ...

Page 29: ...ed The top two sections you will be using are identical they accept an 8V AC input and they go into a Bridge rectifier which makes a for a DC signal that is then fed to the LM1084 adjustable regulator The regulator is set to 6 3V output based on the values of the two resistors The output of 6 3V DC for each section is fed to the filament supply on each Line stage tube 12au7 ecc99 Figure 15 Filamen...

Page 30: ...ament Board Parts List The Filament board is pretty straightforward the only tricky part would be to make sure the screw on the heat sink regulator is oriented so that you can get to it with a screwdriver to tighten up Also the 3 regulator pins are quite close together on the underside of the board it is recommended that you usually solder the outside pins first and then the middle one last Note v...

Page 31: ...Figure 16 Completed Filament Board 27 ...

Page 32: ...8 1 1 Mount the Filament board into the Chassis Figure 17 Location of the Filament Board within the Chassis Position the completed Filament Board as shown above in Figure 17 28 ...

Page 33: ...epeated below in Table 2 Also on the next page in Figure 19 you will find a schematic of the Power Supply PCB POWER SUPPLY PCB PARTS LIST QTY Item 1 47uf TUBE cap 600v 1 3 9uf 450v EVO Oil Film cap 1 33uf EVO Oil 350v 1 47uf EVO Oil 1 8 pin cmc valve bases 1 5U4G Tube 1 WE 274B 1 PCB DAC5 1 REV B 1 10K Mills resistor 50W Table 2 Power Supply PCB Parts List 29 ...

Page 34: ...Figure 19 Power Supply PCB Schematic 30 ...

Page 35: ... Install a bridge Figure 20 Where to install the Bridge on the Power Supply PCB The first thing you need to do is add the bridge between the two boards as seen in Figure 20 using a small piece of 18G wire 31 ...

Page 36: ... notch on the stencil of the PCB This is to ensure the 8 pin Valve Base is oriented correctly You can use some tape to secure the Valve Base while you solder on the bottom side You want to solder just one pin in and then solder the pin on the opposite side of the base this way with just two pins soldered you can turn over to look to see the valve base is flat If it is not for whatever reason you c...

Page 37: ...caps in the kit They do not have a polarity but you may want to position them so that the writing on the caps is facing up so you can read it this makes it easy to identify the values of the components the correct value is written right on the PCB Solder from the bottom and the top The black 47uf TUBE cap is also not polarized so it can be positioned either way Figure 22 shows a completed Power Su...

Page 38: ...ard that we assemble for you The Super Regulator Board takes the 3 x 8 0 AC voltages from the dedicated filament transformer PTDAC4 1 and creates three ultra quiet DC voltages that are used on the Digital DAC Board to feed the Digital to Analog circuitry The parts supplied for this board can be found on the next page in Table 3 34 ...

Page 39: ... C5 C6 C9 47uf 604 1054 ND 1 C10 10000pf 50v 493 3455 ND 6 C1 C2 C3 C4 C7 C8 4700uf 25v cap 604 1058 nd BRIDGES 3 B1 B2 B3 Bridge Rectifier GBU4M BPMS MD REGULATORS 2 IC1 IC3 Regulator 1 IC2 Regulator LT3015ET HEAT SINKS 3 Heat Sink FA T220 25E 3 on heat sink HS pads 926 1475 nd Table 3 Super Regulator Board Parts List Examine all the parts and plan to take some time on this board it s delicate an...

Page 40: ...e of 78K in R3 is made up of 2 resistors by putting them in series a good way to do this is put each resistor in a hole RESISTORS QTY Designation Description Part Number 1 1 R3 78K 56K 22K 56K P56 0KCACT ND 22K S22KCACT ND 1 R4 12 1K PPC12 1KXCT ND 2 R5 R1 2 2K A105957CT ND 2 R6 R2 14K PPC14 0KXCT ND Table 4 Super Regulator Board Resistors Note that for R3 you have to put the two resistors 56K and...

Page 41: ...wn one side and that would designate the negative side of the cap the cap has to be installed in the correct orientation or it will possibly explode at some point CAPACITORS QTY Designation Description Part Number 3 C5 C6 C9 47uf 604 1054 ND 1 C10 10000pf 50v 493 3455 ND Table 5 Super Regulator Board Capacitors Figure 25 Capacitor locations 37 ...

Page 42: ... a specific orientation with the side of the rectifier lining up with the on the PCB The side of the rectifier is the side with the edge cut off BRIDGE RECTIFIER QTY Designation Description Part Number 3 B1 B2 B3 Bridge Rectifier GBU4M BPMS MD Table 6 Super Regulator Board Bridge Rectifier Figure 26 Bridge Rectifier locations 38 ...

Page 43: ... operation Once in position then gently solder the small regulator pins from the underside of the board Be careful here you don t want to use too much solder such that it will bridge across the pins only a small dab will be required For now do not secure the heat sink to the board this could be done later once the unit is all tested and working properly REGULATORS HEAT SINKS QTY Designation Descri...

Page 44: ... in a specific orientation Note the capacitor with the Stripe side is the NEGATIVE side and you can see on the PCB the positive side denoted CAPACITORS QTY Designation Description Part Number 6 C1 C2 C3 C4 C7 C8 4700uf 25v cap 604 1058 nd Table 8 Super Regulator Board Capacitors Figure 28 Final Capacitor locations 40 ...

Page 45: ...9 6 Final Product Be sure to snip the protruding pins on the backside to reduce risk of shorts Figure 29 Snipped pins on the back side 41 ...

Page 46: ...42 ...

Page 47: ...43 ...

Page 48: ...e Power Supply PCB Start by looking at the three pieces of documentation below that is also located in the appendix The Overall wiring graphic for the Power Supply and the two Mains transformers These are also in large format on the next three pages you might want to print these out Figure 30 DAC 5 1 Interwiring The above documentation can be found in the next full pages ahead so you can print out...

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Page 52: ...ange Red and Blue White check these wires out on the PTL4 transformer sheet and you will see they are 454V CT 0 Connect these to the Power Supply PCB as shown on the graphic They are all somewhat short lengths to connect give yourself a little slack in case you need to lift the board up later an extra 2 of slack would be good or if you are an expert wiring guru you can make your own decision Then ...

Page 53: ...rs are 2A versions The 2A versions all go to the Super Regulator Board on the digital side while the 4A one goes to the Filament PCB Start by twisting the wires together on each 8v AC pair We are only going to be using the Brown and Brown White for the moment Route these wires over to the Filament Board and solder from under the board to the input of the Filament PCB These wires will connect to th...

Page 54: ...hown below in Figure 32 Figure 32 Position of the brown and brown white wires Next bridge these wires over to the second position as shown in Figure 33 so basically this single 4A 8V ac source will supply both of these filament sections Figure 33 Bridging the wires 50 ...

Page 55: ...e 1st choke CH12H12 will connect into AFC 1 It does not matter which wire goes into which of the two inputs you don t need to twist these wires just run them straight under the board to this position 2 Take the 2nd choke CH9H12 and wire to AFC 2 position 3 Connect up the 3rd choke to the AFC 3 position 51 ...

Page 56: ...10 4 Wiring the 15K Mills resistor to the Power Supply PCB Figure 35 15K Mills Resistor to the Power Supply PCB Wire one side to the HT1B position and wire the other side to the GND position 52 ...

Page 57: ...o you can go ahead and connect the three pairs to the three inputs Also it does not matter which wire of the pair goes to the two input pins as it is AC voltage and just a phase difference Transformer details can be found on the next page Figure 36 Twisted wires from the PTDAC4 1 Transformer Take the Blue Blue White pair and twist together Take the Orange and Orange White pair and twist together T...

Page 58: ... an input side They are all the same specification so it does not matter which pair goes to which of the three sections Figure 37 shows an example of the interwiring connection from PTDAC4 1 connected to the Super regulator board Figure 37 Wires from the PTDAC4 1 to the Super Regulator Board 54 ...

Page 59: ...means that the 0 is flush to the chassis and the 1 is raised up When you go to power up not yet you will push the 1 down so that it is flush with the chassis Next you will power up the unit to test some voltages Start by making sure that no wires that are connected to the Power supply are left dangling If you have followed the instructions to this point there should be no extra wires We just want ...

Page 60: ...ltage checks Now here are the steps to power on and test power supply See the graphic on next page to identify these locations use your voltmeter to measure If you are not getting any voltages make sure you are on DC volts on your meter and if still no luck check that the Power Switch is in the 1 position against chassis and that the FUSE is not blown You can use an ohm meter on the fuse when it i...

Page 61: ...HIGH voltage points HT1 B HT2 B which will be in the 270 280 range This voltage will settle down to 260v once we connect up the rest of the circuit but for now if you are getting a voltage in the 260 290v DC range then all is good and you have successfully completed the Power Supply testing section 57 ...

Page 62: ...58 ...

Page 63: ...ensure a high quality SPDIF signal gets delivered to the Board Out of the torrodial it enters the CS8414 receiver chip this chip will strip off the modulation and output a pure digital 1 s 0 s format This enters the Analog Devices AD1865 Resistor Ladder Chip This chip will output a current source representing the analog waveform A high quality AudioNote tantalum resistor of 330 ohms is on the outp...

Page 64: ... board the hole that is unpainted and closest to the rear of the chassis will be the first hole to find We are actually going to just introduce a couple of connections to the digital board before positioning in the chassis that we will be installing later Connect the Coaxial cable from the SPDIF input to CON1 USB input XLR input Con1 The board has two channels or inputs CON1 and CON2 The first cha...

Page 65: ...orrect location Suggesting you just loosely put one screw into the ground hole to position the board in the chassis We will be needing to wire to this board and its easier when the board is not installed down in the chassis we can secure at the end of the build Figure 41 Unpainted area on chassis If you would like to wire up the inputs to the digital board 1 SPDIF input 2 CON Switch and 3 XLR then...

Page 66: ...ide to wait to also wait on the connections from the super regulator board to the Digital Board which are in the next section You can do the super regulator board connections and the Digital Board inputs at the same time 62 ...

Page 67: ...Figure 42 Digital Board installed in the Chassis Figure 43 Digital Board installed beside the Super Regulator Board 63 ...

Page 68: ...les on the right these are for the toggle switch that is used to switch between CON1 and CON2 The two holes that you see above LEFT are the input SPDIF holes this will connect to the WBT silver 75 ohm RCA input the below graphic gives an over view of these connections that we will perform near the end of the build Figure 45 Digital Board Connections 64 ...

Page 69: ...nput connection They can also be used for a USB input or a second SPDIF channel Contact us for details As we mentioned these connections to the digital board can be done at the end of the build for now let s move on to the output of the digital board which we will be connecting up and proceeding with the rest of the build 65 ...

Page 70: ...ons on the DAC Board We have as Right Signal RSIG and a Left Signal LSIG later we will be connecting these to the IV transformers which are the mu metal cylindrical cans shown below We will repeat this information when we get to that part for now though let s start connecting up the super regulator Board to the DAC board 66 ...

Page 71: ...e graphic shows the connections between the Super regulator Board on top and the DAC board The three regulation sections on the super regulator board put out 9 9 9 The middle section is the 9 negative voltage So make the above connections as per the picture and it should look like Figure 49 9 9 9 67 ...

Page 72: ...Figure 49 Super Regulator Board to DAC Board 68 ...

Page 73: ...and drives the output transformers The input stage is comprised of a 12au7 tube and the output stage is an ECC99 that drives the output transformers It will be installed in the chassis right next to the DIGITAL Board This board has a couple of configurable sections but we will guide you through the configuration for use in the DAC5 1 69 ...

Page 74: ...the parts in it Recommend you use an ohm meter to measure all the resistors and make sure you know their value and location The parts list can be found in your kit bag or in Table 9 on the following page first let s install the necessary jumpers with silver wire provided 70 ...

Page 75: ...d 1K 1W tantalum 2 R5 R3 12au7 Grid to GND 1M 1W Tantalum 2 R6 R4 ECC99 Cathode 1K 1W tantalum 2 R7 R8 12au7 Anode 39K 1W tantalum 2 R9 R10 ECC99 Grid to GND 1M 1W Tantalum 2 R11 R12 ECC99 Cathode 820R 1W Tantalum 2 500K 500K VR9 VR10 1M 1W Tantalum J OP J OP plate solid core silver wire 22g JJ OP JJ OP solid core silver wire 22g ELECTROLYTIC 4 C1 C2 C5 C6 tube cathode bypass 470uf 35v Elna Silmic...

Page 76: ...input for each channel so we are basically connecting the channels together Black Jumper This is the high voltage input for each channel so we are basically connecting the channels together NOTE G A and G B are also grounds and connected to the black jumper as you will see when you flip over the board You may notice that the in the photograph of the board it is slightly different these jumpers but...

Page 77: ...e Tantalum Resistors Install the Resistors be sure to check with an OHM meter and also read the color codes if you are so inclined to install the correct resistors in the correct positions The only tricky one is the 1M resistors installed where you see the words 500K this is a configurable position for use in other kits in the DAC5 1 we will install a 1M resistor in this position 73 ...

Page 78: ... tape to secure the valve base down solder one leg from underside of the board and then the leg on the opposite side with these two legs soldered remove the tape and make sure it is flat if not flat then easy to correct at this point by re applying heat to the solder joint and pushing on the valve base on the side that needs some adjusting Once you are satisfied then you can continue soldering the...

Page 79: ...apacitors if you are using VCAP there is a green and red lead on these caps make sure that the green side is on the INPUT side of the board where the 12au7 tube is the output of the board is the ECC99 side and that is where the red lead would go If using AudioNote film caps then locate the line on the Cap and consider this the input side Here is a shot of the Line stage completed and with tubes in...

Page 80: ...Figure 56 Completed Line Stage Installed 76 ...

Page 81: ...to two 50cm halves then you will need to solder the red black wires into the Filament Board in the first position then take the other 50cm twisted red black and solder into the other filament position see Figure 57 Figure 57 Line Board to the Filament Board This slide represents the filament supply wiring that you will do note that the diagram shows a red line with arrow this represents a twisted ...

Page 82: ... this section we are going to connect the Power Supply Board to the Line Board as you can see from the graphic you will install the ground wire as shown to either one of the G A G B connections use a Black wire 18g The HT2B from the power supply connects to the B A connection as shown on the graphic 78 ...

Page 83: ...fer the delicate analog signal generated on the DAC board over to the Line stage with the correct impedences Figure 59 Location of the I V Transformers On the next page you can see the graphic that shows the connections between the Digital Board Output to the IV transformers to the Input of the LINE Board 79 ...

Page 84: ... from the IV transformers when you strip the ends will have exposed wire this wire actually needs to be TINNED as it has a coating on it and will be difficult to solder into the board without doing this first Once tinned you can bring it to the hole on the digital board and apply some solder and it will connect to the board For the black and green wires we suggest you twist them together and strip...

Page 85: ...ember this is where you have to connect the ground wire from the super regulator board last hole on the right of the board over to the input GND on the line board CHASSIS GROUND CABLE Connection from ground screw to the INPUT ground on Line Board You can take the provided black wire with 10R resistor and 01 cap and GND lug that is connected to the chassis ground screw over by the IEC socket route ...

Page 86: ...e Line board showing the Inputs NOTE the ground inputs are on the Outside and the left and right signal inputs are on the inside With the IV transformers connected up we can move on to the installation of the output C core transformers 82 ...

Page 87: ...olarity The C core output transformers are positioned in the chassis The picture above shows the transformers at opposing polarity but this is not necessary align them evenly as shown in the graphic on next page in Figure 64 and this matches up with the correct holes in the chassis 83 ...

Page 88: ... graphic and a secondary which is just lugs so you will need to take the supplied wire and solder to the lug there are three lugs per transformer and connect to the XLR RCA output With the output transformers in position please make the primary transformer wire connections the RED wires will connect to the Line Board and the black wires will connect to the Power Supply Board see next page for deta...

Page 89: ...Supply Figure 65 Output Transformer to the Power Supply PCB Once C core transformers are installed you can connect the red primary wires to the Line stage board as shown and connect the Black wires from the primary back to the Power Supply Board into HT1B 85 ...

Page 90: ...are for final wiring for the RCA s and you can put the Black on top and the Red on the bottom Figure 66 Rear of Chassis connections Analog Outputs Silver RCA XLR SPDIF AES optional Input XLR Outputs SPDIF Input This is the WBT silver 75ohm RCA input that you can connect into top right hand corner This is special silver RCA designed for digital input Switch for CON1 and CON2 86 ...

Page 91: ...Figure 67 Close up of the SPDIF input selector switch and the RCA outputs from the rear of the chassis Figure 68 inside of the chassis showing all the connections 87 ...

Page 92: ...Figure 69 Another angle from inside the chassis showing the connections You can clearly see the RCA outputs on the right side and the SPDIF RCA input above the CON1 CON2 switch 88 ...

Page 93: ...t transformer has three terminal lugs on them at the top These lugs allow us to use a high quality wire from the transformer to the output RCA this carries the all important analog output signal from the output transformer Plan out your route as you can see on the next page in Figure 71 we have routed the wires from the output transformers down along the side of the chassis 89 ...

Page 94: ...p the RCA outputs if you are not using XLR outputs on the DAC then you cannot bother wiring them up and you won t need the phase wire from the output transformer connect the center tap wire from the transformer and connect these to the Ground on the RCA so basically each transformer will wire to its own RCA Then connect the Phase wire from the output transformer to the Signal on the RCA If you are...

Page 95: ... supply If you power on and see all the tubes lit that s a good start you may want to double check the HT1 and HT2 voltages which should be around 260v you can definitely try the DAC in your system if you are feeling confident we are assuming a working power supply of course Take the SPDIF from your transport and connect to the SPDIF input on the rear of the DAC5 1 connect the analog outputs to an...

Page 96: ...r on off power Here is the idea of the on off rotary The mentor comes with two on off switches there is a rocker switch at the back of the unit and an optional ON off switch at the front the idea is that you can leave the rocker switch at the back of the unit in the ON position permanently and control the ON off from the switch at the front this is just for convenience sake if you prefer to switch...

Page 97: ...Figure 73 Installed Rotary Switch Outside Figure 74 Installed Rotary Switch Inside 93 ...

Page 98: ... on Figure 75 Rotary Switch Wired The other end of the cable has a pair of CRIMP lugs What you will do is to replace one of the wires in the twisted pair that is connected from the IEC to the rocker switch so you have already installed a twisted pair of crimps take just the RED wire as an example and remove this from the IEC and the rocker switch and in its place connect up the crimped ends of the...

Page 99: ...el the plastic off both the front and the back of the faceplates and then install in position the front faceplate will use larger M4 Black countersunk screws 4 and the rear faceplate will use the smaller black M3 countersunk screws 95 ...

Page 100: ...its rogers com and let us know how everything went any suggestions for tweaks to the manual will be appreciated Also if you would like to send us some pics we can post on the website or our facebook page and we would love a review from you regarding the sound We hope the unit brings you many years of joy and we look forward to hearing from you 96 ...

Page 101: ...21 DAC5 1 Appendix 97 ...

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