Summary of Contents for Horizon Fitness 3.1
- Page 1 Project Project Horizon Horizon USER MANUAL FOR VERSION 3.1 AMPLIFIERS APRIL 6 2015 WWW.GARAGE1217.COM...
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Page 2: Specifications
Specifications - Single ended OTL class-A output stage. - Power consumption: 13W continuous, 19W peak. - Power supply: 48VDC (0.55A cont, 0,8A peak) OUTPUT OUTPUT RESISTANCE - Input Resistance: 11kΩ / 31KΩ dependant on setting and module POWER - Input Sensitivity (6N23): 270mV (dependent on tube) 1.5R 120R INTO:... - Page 3 WARNING: Although Project Horizon runs at a generally safe 48VDC, Injury from improper assembly is quite possible. The main danger comes from installing the polarized capacitors backwards as they can only be installed in one direction much like a battery (more detail on capacitor installation comes later in this manual) If a capacitor is installed backwards, it may burst resulti ng in burns or eye injury.
- Page 4 Bottom Chassis Prep / Final Chassis Assembly: - ONCE THE PCB HAS BEEN ASSEMBLED, ASSEMBLE EACH OF THE 4 RUBBER FEET AS THUMB SCREW SET IT ONTO THE FOUR THREADS SHOWN, ATTACHING EACH FOOT TO THE GRAY STICKING OUT OF THE BOTTOM GRAY SMOKED ACRYLIC BOTTOM CHASSIS ACRYLIC CHASSIS THAT YOU CLEAR ACRYLIC TOP...
- Page 5 Project Horizon Operation Guide: Normal Operation and Notes: - Plug in the amplifier and then the power supply (in that order). Make sure the tube, headphone jack and input RCA’s are secure. Once the amplifier is turned to the ON position, the front red LED (closest to the volume knob and headphone jack) will illuminate red for approximately 1 minute.
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Page 6: Assembly Guide
Project Project Horizon Horizon Assembly Guide POWER SWITCH RCA LINE OUT RCA INPUT POWER R-CHANNEL L-CHANNEL R-CHANNEL L-CHANNEL JACK LED BIAS ADJUSTMENT 6V / 12V SELECTABLE LED PROVIDES LOW NOISE JUMPER (HEATER VOLTAGE) REFERENCE VOLTAGE FOR ANODE CURRENT SOURCES LED ON/OFF LED COLOR CHANGING TRIMMERS INPUT CAPACITOR BYPASS... - Page 7 STEP 1: POPULATE ALL SMALL COMPONENTS ON THE BOARD SUCH AS RESISTOS, RIGHT ANGLE JUMPERS, DIODES AND SMALL CAPACITORS. THROUGHOUT YOUR BUILD, ALWAYS INSTALL THE SMALLER PARTS FIRST, WORKING YOUR WAY UP TO THE LARGER COMPONENTS FLAT SPOT OR THE SHORT LEAD ON RED LED (INDICATES NEGATIVE SIDE OF LED) MUST FACE...
- Page 8 POLARIZED CAPACITORS MUST BE INSTALLED IN THE STEP 2: POPULATE ALL MID SIZE COMPONENTS SUCH AS RCA’S, CORRECT DIRECTION (WILL HAVE A STRIPE DOWN THE SIDE POWER COMPONENTS, SMALL CAPACITORS, TUBE SOCKET, DESIGNATING POLARITY) INSTALL THIS STRIPE FACING THE RELAY, TRIMMERS AND SO FORTH FLAT SPOT ON THE CAPACITOR OUTLINE ON THE BOARD PLEASE NOTE: CENTER PIN OF DC SOCKET IS...
- Page 9 VOLPOT GROUNDING GROUNDING THE VOLUME POTENTIOMETER IS REQUIRED AS WITHOUT IT, THE AMPLIFIER MAY BE SUBJECTED TO NOISE / INTERFERENCE. THE IMAGES ARE OF THE PREVIOUS GENERATION SUNRISE, HOWEVER THE GROUNDING PRINCIPAL IS EXACTLY THE SAME. FIRST, INSERT A WIRE LEAD INTO THE RIGHT SIDE VIA NEXT TO THE VOLPOT AND SOLDER IN PLACE.
- Page 10 STEP 3: POPULATE ALL LARGE SIZE COMPONENTS SUCH AS LARGE CAPACITORS, HEATSINK ASSEMBLIES AND EXTENDED JUMPER PAY ATTENTION TO THE POSITION OF THE IRL510 AND LM317'S ATTACHED TO THE HEATSINKS! THE IRL510'S SHOULD BE TO THE REAR / LM317'S TO THE FRONT OF THE AMPLIFIER.
- Page 11 COMPLETED HORIZON 3.1 LAYOUT AND PHOTO:...
- Page 12 EXTREME HEAT WARNING: Project Horizon runs in Class A operation generating high temperatures on the heatsink assemblies. Never touch the heatsink assemblies or tube during operation or severe burns may occur. Temperatures in excess of 70C / 158F are common in these areas. ONLY OPERATE THE AMPLIFIER IN A WELL VENTILIATED AREA! NEVER COVER THE AMPLIFIER OR OPERATE IN A CLOSED OR CONFINED SPACE SUCH AS A CABINET! See areas of caution below highlighted in red.
- Page 13 Easy Set Bias Adjustment Easy set bias makes adjusting tube bias quick and easy. You can access the channel selector for the Easy Set Bias from the outside of the chassis without having to take off the top cover. Dial in the bias by turning the blue trimmers clockwise if bias for the channel is low or counter-clockwise if the bias for the channel is high.
- Page 14 Manual Bias Setting Using a Multi Meter - First, make sure no equipment such as headphones or other source device is plugged into the amplifier - Turn the volume knob down counterclockwise (its lowest setting) and make sure the power is off - Insert your tube of choice into the amplifier and make sure all proper jumper tabs have been placed according to your tubes voltage and how you want to use the amplifier - Set your Multi-Meter (DVOM or DMM) to voltage DC.
- Page 15 Project Horizon has several jumpers settings to customize the amp the way you would like it. Below gives you the details on what these jumper settings do! THE 6V / 12V JUMPER ALLOWS YOU TO USE BOTH 6 AND 12 VOLT TUBES. BEFORE POWERING ON YOUR AMPLIFIER, YOU MUST MAKE SURE WHAT VOLTAGE YOUR TUBE RUNS AT AND SET IT ACCORDINGLY VIA THE JUMPER.
- Page 16 Project Horizon now features a selectable gain module which allows a quick change of input resistor values combined with jumpers for a quick high/low setting adjustments INPUT GAIN CAN BE CANGED +/- USING THESE JUMPERS DEFAULT QUICK CHANGE RESISTOR USING THE DEFAULT RESISTOR VALUES ARE 30K MODULE (20K RESISTORS) GAIN OPTIONS ARE 14 OR 26dB...
- Page 17 LED Light Color RGB LED COLOR / BRIGHTNESS ADJUSTMENT TRIMMERS BL UE GREEN Another feature of Project Horizon is an adjustable RGB (RED GREEN BLUE) LED under the tube. RGB LED’s can produce almost any color desirable. Often manufacturers tie you into their specific color scheme on their products.
- Page 18 Project Horizon Transistors Resistors Q1 = BC546 X 2 R1 = 100K SM X 1 Q2 = BC556 X 3 R2 = 470K SM X 1 Q3 = IRL510 X 2 R3 = 10K SM X 3 R4 = 330K SM X 1 Inductor R5 = 330R SM X 2 L1 = 100uH X 1...