Amp Ohm
Todays deals on Amp Ohm?
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RELIANCE RHEOSTAT 5000 OHMS .005 AMPS 90825 POT NEW $2,200.00 |
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GE RHEOSTAT 8070EB105AE58 52 OHM 600 V 3.6 AMP 3246913G58 GENERAL ELECTRIC NEW $1,350.00 |
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Bonitron m3575r-h16bf resistor module 45 amp 16 ohm $600.00 |
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Post Glover Stainless Steel Grid Resistor 55-191839-006 0.84 OHMS 1290.0 Amps $546.25 |
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New Ohmite 720 Ohms 1.02 Amp Single Turn Rheostat RTS720 $349.00 |
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10xUni-T Palm Multimeter Volt Amp Ohm Temperature UT33C $249.99 |
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RHEOSTAT, 125 OHMS, OHMITE, SPEC NO: 0862, 2.00 AMPS MAX. $299.00 |
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OHMITE RUS1R0 31.623 MAX.AMP .1 OHM NEW $290.00 |
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Sigma 22JNCC-50G-SIL Relay DPDT 2Amp 50Ohms 28MADC NOS $249.00 |
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55 NEW AMP Tyco 413476-2 BNC Jack Female 50 Ohm PCB Vertical Connectors $249.95 |
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Pecision switching Relay coil 1000ohms (5amps) BQA-1309 $225.00 |
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10x Uni-T Palm Size Multimeter Volt Amp Ohm UT33B Data $159.99 |
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DT-5302 Small Resistance 4-wire Kelvin Ohm Capacitance Voltage Current Amp Meter $199.95 |
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OHMITE 24.8 OHMS RESISTOR – 3.2 AMPS – SPEC NO. 58235 – Qty 1 $150.00 |
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DT-5302 Small Resistance 4-wire Kelvin Ohm Capacitance Voltage Current Amp Meter $149.95 |
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DT-5302 Small Resistance 4-wire Kelvin Ohm Capacitance Voltage Current Amp Meter $149.95 |
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DT-5302 Small Resistance 4-wire Kelvin Ohm Capacitance Voltage Current Amp Meter $149.95 |
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DT-5302 Small Resistance 4-wire Kelvin Ohm Capacitance Voltage Current Amp Meter $149.95 |
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Lot Ohmite Rheostats 3.5 Amp , 4 ohms , some rust , minor chips $140.00 |
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Vintage Chicago Instrument Volt-Amp-Ohm Meter VOM 458A $125.00 |
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7 X Electronic Specialty Relay 68GB95N-A1-AD-552(1) 26.5VDC 552 OHMS 2AMPS 28VDC $120.00 |
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Tyco AMP 220009-1 MOD B Crimping Tool/Crimper AMP 50-Ohm BNC Connectors $139.00 |
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CTG 101A200 Power resister 200 ohm .58 Amp New $129.99 |
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3500 OHM MEMCOR, .119 AMP, INSULATED FOR 3OO VOLTS, TYPE R-50, USA, KS-8852 L9 $129.99 |
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NEW AMP PRO-CRIMPER II DIE SET 75 OHM BNC COMMERCIAL COAX HEX-CRIMP 58425-1 $117.00 |
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(4) OHMITE RHEOSTAT RLS1R0 0525 1 OHM 12.3 AMPS $99.99 |
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Kilovac KC-2/S26 H.V. Ceramic Vacuum Relay15Kv SPDT 50 Amps 26.5 VDC 250 Ohm $110.00 |
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DT-3348 240KW 1K Amp Clamp-on AC/DC Current Voltage Watt Frequency Ohm Meter NEW $99.95 |
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OHMITE 42384 ROTARY ENCODER 2500OHMS 0.1AMP ***NNB*** $99.00 |
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Ohmite RNS100R 100 Ohm 1.73 Amp Variable Wire Wound Resistor $99.99 |
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Fluke 117 True RMS Digital Multimeter Volt Ohm Amp Meter $99.00 |
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CONRAC 24155 24155G Accelerometer .010 Amps ±50 G Resistance 2000 Ohm $99.00 |
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CONRAC 24155 24155G-10-20 Accelerometer .010 Amps ±10 G Resistance 2000 Ohm $99.00 |
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CONRAC 24155 24155G-5-20 Accelerometer .010 Amps ±50 G Resistance 2000 Ohm $99.00 |
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DT-3348 240KW 1K Amp Clamp-on AC/DC Current Voltage Watt Frequency Ohm Meter NEW $79.95 |
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DT-3348 240KW 1K Amp Clamp-on AC/DC Current Voltage Watt Frequency Ohm Meter NEW $79.95 |
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DT-3348 240KW 1K Amp Clamp-on AC/DC Current Voltage Watt Frequency Ohm Meter NEW $79.95 |
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DT-3348 240KW 1K Amp Clamp-on AC/DC Current Voltage Watt Frequency Ohm Meter NEW $79.95 |
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Philips PM 2503/02 electronic volt/amp/ohm meter $87.99 |
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Philips electronic volt/amp/ohm meter PM 2403/05 $87.96 |
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10 DEUTSCH RELAYS 300-30005 26.5 VDC 200 OHMS 1.5 AMP $60.00 |
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GE (NEW) IC9033F2A5 60.0 Amp, .13 Ohm Resistors $75.00 |
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GE (NEW) IC9033F2A5.P 60.0 Amp, .13 Ohm Resistors $75.00 |
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OHMITE MODEL N RNS1K5 RHEOSTAT POTENTIOMETER 1500ohm 0.447 MAX AMPS – USED w/GUA $80.00 |
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OHMITE 35473 1000OHM .36AMP 50WATT RHEOSTAT $38.95 |
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500W 4 OHM Audio Power AMP Test Dummy Load, Non-inductive, Amplifier, 500 Watts $69.00 |
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500W 8 OHM Audio Power AMP Test Dummy Load, Non-inductive, Amplifier, 500 Watts $69.00 |
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.01 Ohm 1% 20 Amp Shunt Resistor 200mV Qty 100 #100708 $59.95 |
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lot of 10 Ohmic Audio Amp Potentiometer PC30-470 Ohm 20% LOIA $40.00 |
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Crydom D1D40 DC Solid State Relay, 40 Amp .05 Ohm NEW $59.95 |
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NIB OHMITE MODEL L CERAMIC RHEOSTAT, RLS 2K250545,2250 OHM. 0.259 AMPS $50.00 |
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NEW OMMITE 0538 200 OHM 0.865AMP RHEOSTAT-POTENEIOMETER $49.99 |
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500 Watts 8 OHM Audio Power AMP Amplifier Dummy Test Load. $60.00 |
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500 Watts 4 OHM Audio Power AMP Amplifier Dummy Test Load. $60.00 |
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Mini Clamp Digital Multimeter AC DC Amp Volt Ohm Sinometer MS2102 $59.99 |
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ANGSTROHM PRECISION MP40 RESISTOR 10 OHMS 5.477AMPS ***NIB*** $49.00 |
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CONNECTOR N PLUG TYCO/AMP 225669-2 RG213/U Cable 50Ohm Crimp Gold $50.00 |
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Crydom D1D20 DC Solid State Relay, 20 Amp .1 Ohm NEW $49.95 |
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Ohmic Audio Amp Potentiometer PC22-10k Ohm 20% LOIA $45.00 |
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New Memcor 3 Ohm 225 W Single Turn Rheostat 8.66AMP6911 $44.00 |
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Mastech Digital Multi Meter. Volts, OHMS, Amps w/ case $40.50 |
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Mil-Spec Relay 3 Amp 950 Ohm 48VDC Part # PP6610-84 $50.95 |
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ITT Jennings RJ1A-26S HAM Radio SPDT Vacuum Relay 5 KV 26.5 VDC 18 AMPS 335 Ohms $50.00 |
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Tic 1000 AC Digital Clamp on Volt Ohm Amp meter $49.00 |
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CN11: AMP 50 OHM BNC RF CONNECTOR 227699-1 (50 PCS) $40.00 |
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LCD Digital Multimeter AC DC Ohm Amp Meter multitester $29.99 |
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(12) NOS Ohmite Rheostat Potentiometer 50 Ohm 0.5 Amp & (2) NOS Larger Pot $32.02 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C D218 $43.00 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C H218 $42.09 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C C218 $40.90 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C G218 $40.90 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C B218 $40.90 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C M218 $40.90 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C G218 $40.90 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C E218 $40.90 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C M218 $40.90 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C B218 $40.90 |
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Uni-T Volt Amp Ohm Hz Temperature Multimeter UT58C C218 $40.90 |
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Uni-T UT-201 Digital Clamp Multimeter Ohm Voltmeter Amp $40.00 |
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Potter Brumfield DPDT 2 Amp 10,000 OHMS Relay KCP11 NIB $39.99 |
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Clamp Ammeter Volt Amp Ohm Meter DMM Thermocouple HVAC $38.77 |
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OHMITE RKS2K5 POTENTIOMETER 0.20AMP 2500-OHM $30.00 |
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(25) ALLEN-BRADLEY RCR42G561JS JAN 470 OHM 1W 5% CARBON COMPOSITION TUBE AMP (E $30.00 |
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Ohmite 0959 Resistor 50 ohm 100W 100 watt 1.414 amp Nos $37.00 |
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UNI-T UT30B Palm-Size Digital Multimeter DMM Tool Voltmeter Ohm Amp Meter $26.99 |
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300W 1 OHM Audio Power AMP Test Dummy Load, Non-inductive, Amplifier,300 Watts $36.00 |
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300W 2 OHM Audio Power AMP Test Dummy Load, Non-inductive, Amplifier,300 Watts $36.00 |
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300W 4 OHM Audio Power AMP Test Dummy Load, Non-inductive, Amplifier,300 Watts $36.00 |
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300W 8 OHM Audio Power AMP Test Dummy Load, Non-inductive, Amplifier,300 Watts $36.00 |
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CONNECTOR BNC TYCO AMP RF/COAXIAL, PLUG, STR, 50OHM, CRIMP P/N 225886-1 $30.00 |
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BALKAMP AMPS OHMS METER 700-1704 $35.00 |
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3 NEW Amp Type “N” 50 Ohm 1Watt Termination AMP No. 227997-1 $34.95 |
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LCD Digital Multitester Multimeter Voltmeter Ammeter AC DC Ohm Volt Amp Tester $26.36 |
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Brand New UNI-T AC DC Voltage Amp Ohm Standard Digital Multimeters UT39C $33.99 |
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Vintage Jagabi Lubri-Tact Rheostat 5.4 Ohms 6.6 Amps 411AN66CS EPDL X61025 $20.00 |
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(2) OHMITE RHEOSTAT RKS2R0 0442 2 OHM 7.07 AMPS $19.99 |
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UNIVERSAL ENT. MCP-9 VOLT- OHMS -AMPS METER $20.00 |
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Uni-T UT-201 Digital Clamp Multimeter Ohm Voltmeter Amp $22.99 |
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Uni-T UT-201 Digital Clamp Multimeter Ohm Voltmeter Amp $22.99 |
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LCD Digital Multimeter Volt Ohm Amp Tester 30-Range $30.99 |
Amp Ohm Questions
Basic Electronics
BASIC ELECTRONICS BY JITENDRA CHITNIS (B.E.- Electronics)
INTRODUCTION
As a child I was fond of electronic gadgets like Digital Wrist Watch cum stop watch, Colour Television, FM Radio, Walkman, Calculator and many more gadgets were on my want list. And I was lucky enough to get them for handling and after careful use for a year or two I used to open them for my study. All was possible due to my father, my maternal uncle and other family friends who knew about it. It was real fun to open and study though used to understand very little about the circuit inside.
Slowly when I completed my schooling I joined a Radio, Tape and Television Repairing classes and started understanding the real science and technology involved in these black boxes.
Here in this article I want to give a brief Introduction about the basics of the electronics and knowledge to help beginners or learners about what is the importance of this technology how we can use this knowledge to make a better life out of this.
Definition of Electronics
The branch of science which study the flow of electron through a semiconductors such as silicon or germanium is called electronics.
(Silicon and Germenium are the minerals from the Chart of Chemistry)
Conductors, Semiconductors and Insulators
Conductors
Conductors are nothing but the materials which allow the passage of current very easily. This is because they large number of free electrons available. Examples – Copper, Aluminium.
Insulators
These substances which do not allow the passage of electric current through them. In terms of energy band, the valance band is full while the conduction band is empty.
Semiconductors
Semiconductors are those substances which have conductivity inbetween the Conductors and Insulators. In terms of energy bands valence band is almost filled and conduction band is empty and gap between them is very thin.
Types of Semiconductors
1. P type and trivalent impurity to semiconductor
2. n type pentavalent impurity to semiconductor
pn Junction
When a p type semiconductor is joined to n type semiconductor it forms a pn junction.
Forward and Reverse bias of pn junction.
P type to positive and n type to negative is a forward bias condition of pn junction.
On the other hand if we connect p type to negative and n type to positive it becomes a reverse bias condition for pn junction.
Different semiconductor devices used in common electronic circuit
1. Diode- Use as Rectifier, Regulate current flow direction.
2. Transistors- pnp and npn type. Use as Aplifier, Switch
pnp npn
3. Field Effect Transistor- Use as Switch
4. Thyristor- High Voltage Switches for Power Circuits
5. Integrated Circuits- A composition of Different devices in small space to save space and electric consumption.(It consists thousands of diodes, transistors and resistors, capacitors in small size of 0.5 cm by 3 cm – many different combinations can be built as per requirement)
Other circuit devices
1. Resistor- To resist the current and drop voltage to the required level.
2. Capacitor- To maintain a electric charge at a point in circuit. Use Filteration of Voltage
3. Inductor- To oppose the fluctuating current. Use Filteration of current
BASIC LAWS and THEOROMS FOR LAYMAN
Ohm’s Law
When an applied voltage E causes a current I to flow through an impedance Z, the value of the impedance Z is equal to the voltage E divided by the current I
.
Impedance = Voltage / Current
Z = E / I
Similarly, when a voltage E is applied across an impedance Z, the resulting current I through the impedance is equal to the voltage E divided by the impedance Z.
Current = Voltage / Impedance
I = E / Z
Similarly, when a current I is passed through an impedance Z, the resulting voltage drop V across the impedance is equal to the current I multiplied by the impedance Z.
Voltage = Current * Impedance
V = IZ
Alternatively, using admittance Y which is the reciprocal of impedance Z:
Voltage = Current / Admittance
V = I / Y
Kirchhoff’s Laws
Kirchhoff’s Current Law At any instant the sum of all the currents flowing into any circuit node is equal to the sum of all the currents flowing out of that node: SIin = SIout Similarly, at any instant the algebraic sum of all the currents at any circuit node is zero: SI = 0 Kirchhoff’s Voltage Law At any instant the sum of all the voltage sources in any closed circuit is equal to the sum of all the voltage drops in that circuit: SE = SIZ Similarly, at any instant the algebraic sum of all the voltages around any closed circuit is zero: SE – SIZ = 0
Thévenin’s Theorem
Any linear voltage network which may be viewed from two terminals can be replaced by a voltage-source equivalent circuit comprising a single voltage source E and a single series impedance Z. The voltage E is the open-circuit voltage between the two terminals and the impedance Z is the impedance of the network viewed from the terminals with all voltage sources replaced by their internal impedances.
Norton’s Theorem
Any linear current network which may be viewed from two terminals can be replaced by a current-source equivalent circuit comprising a single current source I and a single shunt admittance Y. The current I is the short-circuit current between the two terminals and the admittance Y is the admittance of the network viewed from the terminals with all current sources replaced by their internal admittances.
Thévenin and Norton Equivalence
The open circuit, short circuit and load conditions of the Thévenin model are: Voc = E Isc = E / Z Vload = E – IloadZ Iload = E / (Z + Zload) The open circuit, short circuit and load conditions of the Norton model are: Voc = I / Y Isc = I Vload = I / (Y + Yload) Iload = I – VloadY Thévenin model from Norton model
Voltage = Current / Admittance Impedance = 1 / Admittance
E = I / Y Z = Y -1
Norton model from Thévenin model
Current = Voltage / Impedance Admittance = 1 / Impedance
I = E / Z Y = Z -1
When performing network reduction for a Thévenin or Norton model, note that: – nodes with zero voltage difference may be short-circuited with no effect on the network current distribution, – branches carrying zero current may be open-circuited with no effect on the network voltage distribution.
Joule’s Law
When a current I is passed through a resistance R, the resulting power P dissipated in the resistance is equal to the square of the current I multiplied by the resistance R: P = I2R
By substitution using Ohm’s Law for the corresponding voltage drop V (= IR) across the resistance: P = V2 / R = VI = I2R
Electronic students should learn the following units and formulae:
Units
Current (amp)
Resistance (ohm)
Voltage (volt)
Capacitance (farad)
Resistors in Series Rtotal = R1 + R2 + R3 etc.
Resistors in Parallel Rtotal =
or
1/Rtotal =
Time Period Time period = Resistance x Capacitance (T = R x C)
Ohm’s Law Voltage = Current x Resistance
(V = I x R)
Resistance = Voltage / Current
Current = Voltage / Resistance
About the Author
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