HP 9-Pin User Manual

AUDIO DESIGNCopyright 2006-2008© All Rights ReservedGlassWareAikido Stereo 9-Pin PCBUSER GUIDEIntroductionOverviewSchematicsRecommended Configurations

GlassWare Audio Design9Assembly Before soldering, be sure to clean both sides of the PCB with 90% isopropyl alcohol, wiping away all fingerprints. Fir

GlassWare Audio DesignR4R2inoutR8R1199876321R3R9R1 C11 R5R6R12R13R7C2C12in99B+C1R14R14R13C1C2out outout321678132213678R1R3C11R2R5R7R11R8 R4R6R12R15C6R

GlassWare Audio Design11Top Side PCB Mechanical Layout6 49 128375V157 38 21946V26 49 128375V357 38 21946V4OVERALL PC BOARD DIMENSIONS: 4.00" x 1

GlassWare Audio Design12The table above lists many triodes suitable for the 9-pin-based Aikido amplifier PCB. The table lists the same tube under diff

GlassWare Audio DesignWarning! This PCB is for use with a high-voltage power supply; thus, a real shock hazard exists. Once the power supply is attach

GlassWare Audio Design2The Aikido amplifier delivers the sonic goods. It offers low distortion, low output impedance, a great PSRR figure, and feedbac

Remember, tubes are not yardsticks that never change, being more like car tires—they wear out. Just as a tire’s weight and diameter decrease over time

GlassWare Audio Design4Heater Issues The board assumes that a DC 12V power supply will be used for the heaters, so that 6.3V heater tubes (like the 6F

GlassWare Audio Design5DCHeaterPS300k2W100k1/2WB+B+4300k2W100k1/2WB+0.1µF250V0.1µF250VAC100100Alternatively, you might experiment with floating the he

GlassWare Audio Design6Jumper J7 connects the PCB’s ground to the chassis through the top centermost mounting hole. If you wish to float the chassis o

GlassWare Audio Design 7 Configuring the PCB as a Line Amplifier The Aikido topology makes a perfect line amplifier, as it offers low distortion, low

GlassWare Audio Design8High transconductance output tubes are best for driving headphones, for example, the 6DJ8, 6H30, 12BH7, and ECC99. A coupling