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Vacuum Tube Amplifier Otona no Kagaku (Science for Adults) Product Version Vacuum Tube Amplifier Instructions for Assembly and Operating Parts List Vacuum Tube Amplifier PARTS A PARTS A PARTS D PARTS D A1: Horns (top) (2) D1: Vacuum tubes A2: Horns (bottom) (2) A1 A2 A3 D1 D1 D2 D2 (1B2/blue) (2) A3: Partition plates (2) D2: Vacuum tubes A4: Speakers (2) (2P3/yellow) (2) D3: Battery box cover D4: Output trans- former covers (2) D5: Volume knob A1 A2 A3 D3 D4 D4 D5 A4 A4 PARTS E E2 E2 PARTS E E1: Support posts (2) E1 E2: Tripods (2) PARTS B PARTS B E1 B1: Main unit B2: Printed circuit B1 B2 board PARTS F PARTS F F1: Audio cable F1 PARTS C PARTS C C3 C1: Battery contacts (negative) (2) C1 C1 C2 C2 C2: Battery contacts TOOL&PARTS 3 TOOL&PARTS (positive) (2) 1: Screw C3: Back cover 1 2 2: Washer head screw C4: Rubber pads (4) 3: Screwdriver C4 C4 C4 C4 4 4: Pin straightener CAUTION: The kit may contain more screws, NOTE: The actual shapes of some parts may differ from the illustrations above. etc. than actually required, for use as spares. 2 3 Before Assembling the Kit How to identify a vacuum tube 1. About the vacuum tube If the printed characters A. The vacuum tubes in this kit were manufactured in China, are too faint to read, go by the color on the bottom of more than 30 years ago. They may have some scratches and the vacuum tube. smudges. However, they will perform well. (We do not accept returns of scratched or dirty vacuum tubes. Tubes that do not work will be exchanged.) CAUTION * Please read the following instructions before assembling this kit. B. There are two types of vacuum tubes. If it is too dirty to tell what type it is, you can identify it by the color on the The vacuum tubes are made of glass. Take necessary caution when handling them. There is a risk of injury. Yellow Blue For best performance, the fixtures are made of thin metals. Take necessary caution when handling them. There is a bottom of each vacuum tube. risk of injury. C. Vacuum tubes are fragile. Please handle them carefully. The tip of a vacuum tube is sharply pointed. Take necessary caution when handling them. There is a risk of injury. There are small parts included in the kit. Be careful not to swallow them. There is a risk of suffocation. Two D dry cells are used. Incorrect use of the batteries may cause the generation of heat, explosions or liquid leakage. The following precautions should be taken. To avoid heater problems, do not use Oxyride batteries. Do not use NiCd and other rechargeable batteries. With such batteries, the amplification process may not operate properly. Ensure that the positive and negative terminals of the batteries are aligned correctly. If liquid that leaked from batteries gets into your eyes, rinse it well with plenty of water and consult a doctor immediately. If liquid leaks onto your skin or clothes, immediately wash it off. When the amplifier is not used for a long time, have the batteries removed. Please read the instructions and cautions thoroughly before use. For your safety, be sure to follow the instructions in this manual. In addition, do not use any parts that have become damaged or deformed during use. Store the kit in a location out of the reach of small children. How to use driver (+). ● Plastic materials used in this kit 2. Using the supplied tool Main unit, cover, horn, support post, screwdriver handle, etc.: ABS * Vinyl chloride resin is used in the lead wire cover. ●Screwdriver (Phillips) * Please dispose of this product in accordance with local regulations. 回す The screwdriver is used when tightening a screw. * The screws in this kit are “tapping screws” that carve grooves into the material as they are inserted. 3.Other required items Two D alkaline batteries * NiCd rechargeable batteries or Oxyride batteries cannot be used instead of D alkaline batteries. * The “Speaker sound experiment” and “Circuit modification experiment” require other items (see pages 12 and 14.) * Note: In some cases, the shape and the length of materials may differ somewhat from the photographs and illustrations provided in this manual. 4 5 1 Assembling the Horns 2 Assembling the Main Unit Parts to be used PARTS A Parts to be used PARTS B A1: Horns (top) (2) A2: Horns (bottom) (2) A3: Partition plates (2) A4: Speakers (2) B1: Main unit B2: Printed circuit board Screws (8) Figure-(3) Align the RCA terminal on the (3) Install the B2 printed circuit Screws (4) B2 printed circuit board with the volume. While using board into the B1 main unit. caution not to break the pilot light, install the B2 printed circuit board into the B1 main B1: Main unit Figure-(1) unit. Insert an A3 partition (1) Assemble two sets of horns. How to install the B2 plate between an A1 printed circuit board Screw horn (top) and an A2 Align the RCA terminal, the horn (bottom). volume, and the pilot light with Screw When doing so, insert A1: the holes on the B1 main unit, B2: Printed Horn and then fit it into the B1 main the pins on the unit. circuit board partition plate into the (top) A1 horn (top) and the A2 horn (bottom). Pin RCA terminal Make two sets. A3: Volume After that, secure them Partition RCA terminal with screws. plate A2: CAUTION Horn B2: Printed circuit board While using caution (bottom) not to crush the Figure-(4) pilot light, push it After installing the B2 printed in so that its head sticks out here. Figure-(2) circuit board into the B1 main Attach the A4 speakers (2) Attach the A4 speakers to the horns. unit, flip it upside down and to the two sets of horns secure it with eight screws on assembled in A1: Horn (top) A4: Speaker the back side. (4) Attach the B2 printed circuit Figure-(1). How to tighten the screw board to the B1 main unit. Screw After temporarily tightening Screw all the screws, gradually ネジ provide additional tightening Screw diagonally. Insert it all the way in. Screw A2: Horn (bottom) Screw 6 7 3 Mounting the Battery Contacts 4 Setting the Vacuum Tubes Parts to be used PARTS C Parts to be used PARTS D C1: Battery contacts C2: Battery contacts C3: Back cover C4: Rubber pads (4)） D1 : Vacuum tubes] D2 : Vacuum tubes D3 : Battery box cover D4 : Output transformer (negative) (2) (positive) (2) (blue) (2) (yellow) (2) covers (2) Washer head screws (7) D5 Volume Pin straightener Pin straightener knob Figure-(5) Figure-(7) Mount the C1 and C2 battery (5) Attach the C1 and C2 battery contacts contacts on the battery box. Attach the D3 battery box (7) Attach the D3 battery box cover, Push them in using the back of to the battery box on the B1 main unit. cover, D4 output transformer D4 output transformer cover, and the pin straightener so that it cover, and D5 volume knob to D5 volume knob. C1: Battery contacts C2 will not protrude from the edge. (negative) the B1 main unit. : Battery contacts (positive) D3 : Battery box cover Pin straightener D5 volume knob mounting position D4 Output transformer D4: Output : Main unit cover B1 transformer cover B1 : Main unit Washer This position Note the attachment position. head screws Mount the volume knob D5 Volume knob After mounting the battery contacts, as shown in the figure. flip the B1 main unit upside down. Washer head screws (8) Using the pin straightener, set the Bend and crease the C1 and C2 Figure-(8) battery contacts that have vacuum tube pins perpendicular. B2: Printed Vertically insert the pins of protruded from the back, along the circuit board the vacuum tubes into the Set it vertical B2 printed circuit board, and secure holes on the pin straightener. Pin straightener them with washer head screws. B1 : If pins are bent, straighten Main unit How to attach battery contacts them. (Use caution so that the pins are not broken.) Washer head screw (6) Attach the C3 back cover Vacuum tube to the B1 main unit. Figure-(9) While carefully noting the (9) While noting the insertion positions, Washer head screws positions into which they are C4 : Rubber pad inserted, set the D1 and D2 set the D1 and D2 vacuum tubes. C4 : Rubber pad Washer vacuum tubes on the B1 main unit. D2 : Vacuum tube D1 : Vacuum tubes head screws (2P3/yellow) How to identify (1B2/blue) Bend Washer head a vacuum tube screws : Vacuum tube If the printed characters are D2 (2P3/yellow) C4 : Rubber pad too faint to read, go by the color C3 : Back cover on the bottom of the vacuum Enlarged view tube. Figure-(6) Attach the C4 rubber pads to the four corners of the C3 back cover. After that, using three washer B1 : Main unit head screws, attach the C3 back Yellow 2P3 1B2 cover to the B1 main unit. Blue B1 : Main unit 8 9 5 Assembling and Connecting the Speakers 6 Listening to Music Parts to be used PARTS E Parts to be used (12) Set two D alkaline batteries E1 : Support posts (2) E2 : Tripods (2) PARTS F (sold separately). F1 : Audio cable D alkaline batteries (not included) B1 : Main unit D alkaline batteries (2) (sold separately) Figure-(10) * The speakers are not shown in the illustration. Set the E1 support post (10) Mount the speakers onto the base on the E2 tripod to (make two sets).
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