Class Amplifier
Class Amplifier
Check out this page if you are looking for Class Amplifier
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 Marshall Class 5 All Tube Electric Guitar Amplifier Head  US $349.99
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 Marshall Class 5 Tube 5W Guitar Combo Amplifier NEW US $499.99
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 Divided by 13 Combo Amp Amplifier 30 Watts Class A US $2,250.00
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 Marshall Class 5 Head all tube 5 watt Amplifier NEW IN BOX US $349.99
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 Marshall Class 5 C5H Head Guitar Tube Amplifier EL84 US $349.00
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 Marshall Class 5 Combo C5 U 10 Speaker Amplifier Amp US $499.99
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 LANEY CUB HEAD TUBE GUITAR AMPLIFIER HEAD CLASS A AMP US $369.00
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 LANEY CUB 8 TUBE COMBO GUITAR AMPLIFIER CLASS A AMP US $199.00
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 LANEY CUB 12R TUBE COMBO GUITAR AMPLIFIER CLASS A AMP US $399.00
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 Marshall Class 5 Combo 5W Amplifier B US $302.49
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 Rivera Venus 6 Head ALL TUBE Class A Guitar Amplifier US $41.00
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Ashly SRA-2150 Amplifier Two Channel 80 Watt Ch at 8 Ohms 1RU Chassis Class D Output Circuitry
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Description2x150W RMS @ 4 ohm 1RU, Convection Cooled |
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Ashly SRA-4075 Amplifier Four Channel 40 Watt Ch at 8 Ohms 1RU Chassis Class D Output Circuitry
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Description4x75W RMS @ 4 ohm 1RU, Convection Cooled |
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Ashly SRA-4150 Amplifier Four Channel 80 Watt Ch at 8 Ohms 1RU Chassis Class D Output Circuitry
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Description4x150W RMS @ 4 ohm 1RU, Convection Cooled |
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HiFonics BXi 1606D Mono Block Amplifier
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DescriptionRMS (Continuous) Power: 1600-Watt x 1 @ 1-Ohm |
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Go Power! FBL-200 Class T 200 Amp Fuse with Block
Sale Price: $55.99 |
DescriptionFBL200 200 Amp Fuse Clast T With Block Go Power! DC Fuse Blocks are extra heavy duty DC rated fuses, with "slow blow" characteristics suitable for inverter installations. Protect yourself and your equipment! Includes mounting block, fuse and protective cover... |
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Blue Sea 5502 Fuse Block Class T 225-400 Amp
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DescriptionFuse Block Class T 225-400 AMPPart #: 5502Features:Maximum Voltage: 160 Volts DC Maximum Amperage: 400 Amperes DC Maximum Torque: 190 in-lb (21.47 Nzm) max. Terminal Stud Size: 3/8"-16 (M10) Mounting Holes: Accept 1/4" (M6) Screw Maximum Cable Size 4/0 AWG Fuse Mounting Blocks: Tin-Plated Copper Class T Fuses Available: 110-400 Amperes DC Product : BLUE SEA 5502 CLASS T FUSE BLOCK 225-400 AMP Manufacturer : BLUE SEA SYSTEM Manufacturer Part No : 5502 UPC : 632085955028 |
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Go Power! FBL-400 Class T 400 Amp Fuse with Block
Sale Price: $71.99 |
DescriptionFBL400 400 Amp Fuse Clast T With Block Go Power! DC Fuse Blocks are extra heavy duty DC rated fuses, with "slow blow" characteristics suitable for inverter installations. Protect yourself and your equipment! Includes mounting block, fuse and protective cover... |
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WIR 238 Infrared Listening System With Stethoscope -Under-Chin- Receiver
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DescriptionThe WIR 238 Infrared Listening System With Stethoscope -Under-Chin- Receiver is ideal for TV listening, meetings, or any small group listening application. Listen at the volume of your comfort without disturbing others... |
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Nintendo DS Lite Starter Kit with Adapter - Black
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DescriptionPower A Everyday Starter Kit CPKA079109-01 Gaming Accessory Kit |
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PSP Logic 3 Sound Grip
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DescriptionThe PSP Sound Grip gives you everything you eed to hear more of your favorite PSP game sounds and soundtracks. Its elegant style and contoured design allows easy access to all controls and has ports for earphones & power... |
How do I test the efficiency of a Class A Amplifier circuit?
I need help. I have built a circuit that was already designed and now I have to test it for a class. I can calculate the efficiency, but now I have to demonstrate how to test it using a digital multimeter, an oscilloscope, and a frequency generator. I have no idea how to use the equipment. If someone could fill me in I would greatly appreciate it =]
Testing it for efficiency to determine the class is possible using the maximum undistorted power. Basics: Use the frequency generator to make a sine wave test signal. Connect a load resistor (for example 8 ohms) to the amplifier output, and connect the oscilloscope across this resistor. Drive the amplifier until the sine wave becomes slighly distorted (clipped at the peaks). Determine the maximum power output as just before that occurs. Measure the voltage using the oscilloscope (or a multimeter). Determine the RMS voltage (.707/2 of the peak to peak voltage determined by the oscilloscope). Calculate the output power across the resistor as V*V/R. Now use the multimeter to measure the voltage and the current drawn by the amplifier at maximum output and determine the power supplied (usually to the power output stage only). That is V * I. Determine the ratio of the output power to the power supplied, which is the efficiency as a percentage. Use the efficiency to determine the class. A class A will be something like 40%, a class B something like 70%, a class D perhaps 90% and so on. Look them up. One other point is that the amplifier may overheat, so use a fan if that helps, and keep the time running at maximum power to a minimum, allowing time to cool down between tests.
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