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Triode Electronics

ST70 Kit

INSRUCTION MANUAL

Rev. 1 2007

Содержание Dynaco ST70

Страница 1: ...Triode Electronics ST70 Kit INSRUCTION MANUAL Rev 1 2007...

Страница 2: ...Step 1 Mount the power transformer into the chassis using 8 32locknut Step 2 Mount Rubber grommets for output transformer leads...

Страница 3: ...r grommets for other output transformer and install C354 choke using 6 32 bolts and locknuts Step 4 Mount output transformers into chassis using 8 32 bolts and lock washers run leads through grommet h...

Страница 4: ...Step 5 Mount Octal sockets for EL34 tubes and 5AR4 tube into chassis using 4 40 bolts and nuts Step 6 Install 10k bias potentiometers into chassis...

Страница 5: ...Step 7 Install bias test points next to bias potentiometers Step 8 Install power switch into back panel of chassis...

Страница 6: ...Step 9 Install Gold Insulated RCA Jacks into the front panel of the chassis...

Страница 7: ...Step 10 Build and Install the Driver PCB board into the chassis A populate resistors onto board B Populate Polystyrene Capacitors onto board...

Страница 8: ...C Populate Coupling Capacitors and Screen Bypass Caps onto board D Solder PC mount sockets onto the board E Install Built driver board into chassis using 4 40 bolts and nuts...

Страница 9: ...ile we re at it lets go ahead and put together the SDS Labs capacitor board so it will be ready for later A Install Snap in Capacitors into the board and solder in place B Install Resistors on top sid...

Страница 10: ...C Install Bias caps Heater bypass caps and bias supply diode D Install surface mount resistors onto the bottom of the board...

Страница 11: ...mer together Twist the following wires together the two green wires the two brown wires the two white wires and the two red wires Step 13 Now twist the wires from the output transformers twist the blu...

Страница 12: ...Step 14 Wire the twisted Red leads from the power transformer to pins 4 6 of the 5AR4 socket Step 15 Wire the twisted white leads from power transformer to pins 2 8 of the 5AR4 socket...

Страница 13: ...Step 17 Wire the Blue White Green White wires of both output transformers to pins 3 4 of the EL34 sockets that are closest to the back of the chassis Blue White goes to pin 3 and Green White to pin 4...

Страница 14: ...ire the Blue and Green wires from the output transformers to pins 3 4 of the other EL34 sockets that are closest to the front of the chassis The blue wire connects to pin 3 and the Green wire connects...

Страница 15: ...Step 19 Solder 1k grid stopper resistors onto all EL34 sockets Resistors are installed between pins 5 6...

Страница 16: ...oard to the center lug of the right bias pot looking from bottom of amp Also wire Eyelet 2 to pin 6 of The EL34 with the blue green wires going to it and Eyelet 1 to pin 6 of the EL34 with the Blue Wh...

Страница 17: ...e amplifier Connect eyelet 21 to center lug of left bias pot looking from bottom of amp Also connect eyelet 23 to pin 6 of EL34 with the blue green wires going to it and eyelet 22 to pin 6 of the EL34...

Страница 18: ...one of the EL34 sockets on each side Take the 10ohm resistor and connect it to pins 1 8 of the EL34 socket to the solder lug Then take a wire off either pin 1 or 8 and connect it to pins 1 8 of the ot...

Страница 19: ...rom the eyelet labeled Eye19 this wire will be connecting to eyelet 19 on the Driver PCB board so make sure you have enough length E Connect the red black wire from the PA060 power transformer to the...

Страница 20: ...Note on this picture one of the A470 s red wires is not connected to the board and the main ground wire is not yet attached...

Страница 21: ...nal of the bias pot to the right terminal of the other bias pot Connect a wire from the left terminal of the bias pot to the left terminal of the other bias pot Step 25 Install the fuse holder and ins...

Страница 22: ...of the other EL34 on that side Connect two wires from pins 2 7 of the EL34 that you just ran the green wires to and connect them to pins 2 7 of the other EL34 on that side Step 27 A Solder a 470k resi...

Страница 23: ...and 5 on the driver board Before soldering to eyelets 4 and 5 also connect a second set of wire into the holes which we will connect to eyelets 24 and 25 on the driver board Step 29 Connect two wires...

Страница 24: ...s and use the 16ohm instead Normally we will either tape up the 16ohm tap and ignore it or you can solder to a terminal strip to keep out of the way make sure you don t solder it to a grounded termina...

Страница 25: ...tom with the blue and green wires going to it This will be the same pin the green wire is going to Step 32 Connect a wire from eyelet 14 on the driver board to pin 4 of the EL34 on the left side looki...

Страница 26: ...he power transformer the ground wire from the SDS Labs capacitor board and a wire from eyelet 9 on the driver board all to the solder lug terminal This is the main chassis ground point Note eyelet 9 i...

Страница 27: ...the cord will go to one lug of the power switch and the green wire should be grounded at any convenient point on the chassis Step 30 Connect one of the black wires from the power transformer to the ot...

Страница 28: ...ct a wire from either pin 1 or 8 of the EL34 sockets on the left side to the other bias test point Step 32 Your are finished with the build go take a break and come back in a few hours or the next day...

Страница 29: ...outside sockets of the driver PCB board C Install one 12AU7 12BH7 or ECC99 into the middle socket of the driver PCB board D Install a 2 5A slo blo fuse into the fuse holder E Hook up speakers to the...

Страница 30: ...er about 20 seconds or so of the tubes being lit up you should begin to get a reading on your meter We want to set the bias of each side to 1VDC on the meter turning the bias potentiometers clockwise...

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