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America Wire Gauge= Gauge/diameter |
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The Three Type of Shielding: |
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The Three Types of Noise: |
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Shielding helps to reduce: |
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Sex of connectors: Jacks= Plugs= |
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American’s Wall Outlets offer: |
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Solder used in class are: |
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60/40 Rosin Core:composed of 60% Tin and 40% lead |
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What does OPEN means and value: |
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a connection where it not suppose to be and it value is infinity(ohms)
EX. PIN#2 is open to PIN#1 |
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What is SHORT means and values |
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a connection that is neant to be and about 0 ohms
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EX.PIN#1 is short to PIN#1 |
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Desoldering fused connection with: |
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wick/bulb/pump or desoldering iron |
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it represent an electrical connection |
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have no wires between the IN/OUT ‘s |
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The solder terminals for the tip,ring,sleeve and normalling contacts can be founded using: |
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the difference in electrical potential two point. |
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the oppositionto current flow(given in ohms) |
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the most common troubleshooting involves testing: |
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The Three flavor of voltage are: |
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AC/DC/AC with a DC offset |
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when oscilloscope is set at AC |
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when oscilloscope is set at DC |
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when oscilloscope is set at GND |
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What Percent of isopropyl alcohol is use to clean: |
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Magnetic References Laboratory |
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in the USA,the EQ switch is set to NAB at: |
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ANSI(US)nWb/m 520= 370= 320= 250= 185= |
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dB References to 185nWb/m 520=+9dB 370=+6dB 320=+5dB 250=+3dB 185=0dB |
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the higher the operating level: |
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the lower the noise floor |
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what are L,M and H are setting for difference speeds |
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wind analog tape reel with the tails: |
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Stores tapes in a environment: |
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Stores tapes in a environment: |
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Repro Azimuth/Recheck repro azimuth : |
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a Digital multi meter is used to measure: |
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Turning on an active component require: |
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Op amps and transistor are: |
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transformer and inductor are: |
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integrated circuits chip pin number can be founded by referencing the location of the Dot. The Dot = |
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Common IC chips type includes: |
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linear(operational amplifiers)
digital(logic gates)
component chip(resistors,capacitors and etc.) |
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infinite ohms,no current flow |
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has current flow by design |
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current take the path of least resistance/0 ohms/not by design |
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circuits path does not split/it add up |
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Parallel voltage are always: |
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the voltage across a short= |
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Voltage across a working fuse= |
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they direct all AC waves half cycles to travel in the same direction |
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Bipolar transistors leads are called: |
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the source,gate,and drain |
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what are Op amps schematic symbol: |
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inverting(-) and non-inverting(+) |
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a differential op amplifier amplifies: |
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the difference between the two signal at its inputs |
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are used to show how a logic circuit’s output responds to various combination of the inputs |
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TTL(transistors-transistors logic)indicates: |
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the bipolar digital gate family |
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the operating level for CMOS digital ICs is a fixed value between: |
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metal runs on only one side of the board |
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metal runs on both sides of the board |
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parts are soldered into the circuit board |
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no parts are soldered into the circuit board |
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wide metal runs on a printed circuit board(PCB) are: |
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soldering should be performedd quickly on a circuit board so that traces: |
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Repairing a PCB crack involves: |
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-use of insulated wire, -leaving stress excess -removing enamel, -knowledge of magnet wire enamel removal |
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The three most important features in services manual are the: |
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-Schematic drawings -Assembly drawings -Parts description lists |
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What is a Cross-Reference: |
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a companies offer the sales of the same component under different names |
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what two ways of calibration use dry erase markers: |
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rec. 1k at 0 VU and playback should be 0 VU |
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Rack(forward/backward) is set by: |
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Azimuth is set in electrical cal with: |
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an oscilloscope or monometer method |
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What are common method for biasing are: |
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10k overbias 1kHz peak method |
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in europe, the 0dB nWb/m value is: |
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180nWb/m= (185 nWb/m at 700 Hz) |
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250 nWb/m (260 nWb/m at 700 Hz) |
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