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New Ohmite Vitreous Enameled Resistor Dynamic Braking 300 Watt 10 Ohms cat 2521
New Ohmite Vitreous Enameled Resistor Dynamic Braking 300 Watt 10 Ohms cat 2521
$32.25
quality
Lot of 3 New O S Ohmite vitreous enameled resistor 0411 50 watt 5K ohms L50J5K0
Lot of 3 New O S Ohmite vitreous enameled resistor 0411 50 watt 5K ohms L50J5K0
$19.99
quality
Ohmite OK11G5 Qty 5K New  Original Carbon Film Resistors
Ohmite OK11G5 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1125 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1125 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK15GS Qty 5K New  Original Carbon Film Resistors
Ohmite OK15GS Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1245 Qty 2K New  Original Carbon Film Resistors
Ohmite OK1245 Qty 2K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1345 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1345 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1145 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1145 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1505 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1505 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1105 Qty 5K Original Factory Sealed Resistors Carbon Film 11 Ohm 5 1 4
Ohmite OK1105 Qty 5K Original Factory Sealed Resistors Carbon Film 11 Ohm 5 1 4
$15.00
quality
Ohmite OK1625 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1625 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK12G5 Qty 5K New  Original Carbon Film Resistors
Ohmite OK12G5 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1645 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1645 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1135 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1135 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK13G5 Qty 5K New  Original Carbon Film Resistors
Ohmite OK13G5 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1335 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1335 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1225 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1225 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1635 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1635 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1115 Qty 5K Original Factory Sealed Resistors CarbonFilm110 Ohm 5 1 4W
Ohmite OK1115 Qty 5K Original Factory Sealed Resistors CarbonFilm110 Ohm 5 1 4W
$15.00
quality
Ohmite OK1615 Qty 4K New  Original Carbon Film Resistors
Ohmite OK1615 Qty 4K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1015 Qty 5K Factory Sealed Resistors Carbon Film 100 Ohm 5 1 4W 450pp
Ohmite OK1015 Qty 5K Factory Sealed Resistors Carbon Film 100 Ohm 5 1 4W 450pp
$15.00
quality
Ohmite OK1605 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1605 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1305 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1305 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1325 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1325 Qty 5K New Original Carbon Film Resistors
$15.00
quality
Ohmite OK1205 Qty 5K New  Original Carbon Film Resistors
Ohmite OK1205 Qty 5K New Original Carbon Film Resistors
$15.00
quality
OHMITE Power Wirewound Resistor 10W 12K ohm 5 Lot 5
OHMITE Power Wirewound Resistor 10W 12K ohm 5 Lot 5
$8.00
quality
325 W 330 Ohm Ohmite 4405 Vitreous Enamel Wirewound Resistors  10 in Pack
325 W 330 Ohm Ohmite 4405 Vitreous Enamel Wirewound Resistors 10 in Pack
$2.49
quality
325 W 220 Ohm Ohmite 4400 Vitreous Enamel Wirewound Resistors  10 in Pack
325 W 220 Ohm Ohmite 4400 Vitreous Enamel Wirewound Resistors 10 in Pack
$2.49
quality
5W 75 Ohm Ohmite 4556 Vitreous Enamel Wirewound Resistors  10 in Pack
5W 75 Ohm Ohmite 4556 Vitreous Enamel Wirewound Resistors 10 in Pack
$2.59
quality
3 pcs L25J4K0E OHMITE CHASSIS MOUNT WIREWOUND RESISTORS 4K Ohm 25W 5 ROHS
3 pcs L25J4K0E OHMITE CHASSIS MOUNT WIREWOUND RESISTORS 4K Ohm 25W 5 ROHS
$7.99
quality
L25J4K0E OHMITE CHASSIS MOUNT WIREWOUND RESISTORS 4K Ohm 25W 5 ROHS
L25J4K0E OHMITE CHASSIS MOUNT WIREWOUND RESISTORS 4K Ohm 25W 5 ROHS
$4.99
quality
Ohmite Resistors D225K250E 250 OHMS 10
Ohmite Resistors D225K250E 250 OHMS 10
$25.00
quality
Ohmite Vitreous Enameled Lug Resistor C300K5R0 New
Ohmite Vitreous Enameled Lug Resistor C300K5R0 New
$19.00
quality
OHMITE 1747 BROWN DEVIL 4 K OHMS RESISTOR 12 W NNB
OHMITE 1747 BROWN DEVIL 4 K OHMS RESISTOR 12 W NNB
$8.50
quality
OHMITE 200 120 48 BROWN DEVIL 91 OHMS 12W RESISTOR NNB
OHMITE 200 120 48 BROWN DEVIL 91 OHMS 12W RESISTOR NNB
$6.50
quality
2 Ohmite Vitreous Enameled Resistors 100Watt OHM 125 L100J125
2 Ohmite Vitreous Enameled Resistors 100Watt OHM 125 L100J125
$14.50
quality
Ohmite L100J100 100 Ohm 100 watt resistors 2
Ohmite L100J100 100 Ohm 100 watt resistors 2
$6.50
quality
Ohmite Lug Resistor Watt 225 OHM 500 L225J500
Ohmite Lug Resistor Watt 225 OHM 500 L225J500
$12.50
quality
OHMITE D25K5R0 RESISTOR
OHMITE D25K5R0 RESISTOR
$15.99
quality
OHMITE L25J10K RESISTOR 25 WATTS 10K NIB
OHMITE L25J10K RESISTOR 25 WATTS 10K NIB
$6.99
quality
OHMITE L12J100 RESISTOR 12 WATTS 9618 NEW IN BOX
OHMITE L12J100 RESISTOR 12 WATTS 9618 NEW IN BOX
$4.99
quality
Lot of 4 Ohmite L50J5R0 50W 5 Ohm Vitreous Enamel Power Resistors
Lot of 4 Ohmite L50J5R0 50W 5 Ohm Vitreous Enamel Power Resistors
$28.00
quality
OHMITE L100J25R RESISTOR 100 WATTS NEW
OHMITE L100J25R RESISTOR 100 WATTS NEW
$10.99
quality
LOT 6 OHMITE 470N 100M 40 6 1 2IN LENGTH CERAMIC RESISTOR 10R00J D202936
LOT 6 OHMITE 470N 100M 40 6 1 2IN LENGTH CERAMIC RESISTOR 10R00J D202936
$11.46
quality
LOT 4 OHMITE 65254 CERAMIC RESISTOR 8 1 2IN LENGTH 30000OHM OHMS D202942
LOT 4 OHMITE 65254 CERAMIC RESISTOR 8 1 2IN LENGTH 30000OHM OHMS D202942
$11.64
quality
Ohmite 270 225P 46 50 Ohm Resistor A 13 NO 0902
Ohmite 270 225P 46 50 Ohm Resistor A 13 NO 0902
$12.00
quality
3 Ohmite 45JR10 Resistors New Old stock
3 Ohmite 45JR10 Resistors New Old stock
$5.00
quality
NIB OHMITE Resistor TAP600K1K0E
NIB OHMITE Resistor TAP600K1K0E
$70.00
quality
LOT OF 5pcs 20k Ohm 5W OHMITE TWM5J20K RADIAL CERAMIC RESISTORS
LOT OF 5pcs 20k Ohm 5W OHMITE TWM5J20K RADIAL CERAMIC RESISTORS
$4.99
quality
OHMITE 5K OHMS 225W VITREOUS ENAMELED RESISTOR L225J5K0
OHMITE 5K OHMS 225W VITREOUS ENAMELED RESISTOR L225J5K0
$12.95
quality
Ohmite Planar Heat Sink Resistor TA1K0PH25R0K 25 OHMS 10 D C 0523 NEW
Ohmite Planar Heat Sink Resistor TA1K0PH25R0K 25 OHMS 10 D C 0523 NEW
$75.00
quality
OHMITE LUG RESISTOR D225K500 NEWNEW
OHMITE LUG RESISTOR D225K500 NEWNEW
$15.00
quality
BRAND NEW IN BOX OHMITE RESISTOR 175W 1000 OHMS MODEL 210 175P 46
BRAND NEW IN BOX OHMITE RESISTOR 175W 1000 OHMS MODEL 210 175P 46
$39.99
quality
BRAND NEW IN BOX OHMITE RESISTOR 225W 100 OHMS MODEL D225K100
BRAND NEW IN BOX OHMITE RESISTOR 225W 100 OHMS MODEL D225K100
$44.99
quality
Vintage OHMITE RESISTOR Dividohm NO 1159 50 ohms Old unused
Vintage OHMITE RESISTOR Dividohm NO 1159 50 ohms Old unused
$11.00
quality
Ohmite 11 ohm Roundwire Resistor PFR5K11R0
Ohmite 11 ohm Roundwire Resistor PFR5K11R0
$21.00
quality
Ohmite Victoreen MOX 1 122005K Maxi Mox Resistor
Ohmite Victoreen MOX 1 122005K Maxi Mox Resistor
$0.99
quality
NEW Ohmite 0793 Resistor 75 Watt
NEW Ohmite 0793 Resistor 75 Watt
$19.99
quality
OHMITE D225K1R0 WIREWOUND RESISTOR DIVIDOHM VITREOUS ENAMELED 1 OHM 225 WATT
OHMITE D225K1R0 WIREWOUND RESISTOR DIVIDOHM VITREOUS ENAMELED 1 OHM 225 WATT
$39.99
quality
NOS Box of Ten Ohmite Brown Devil 100 Ohm 20 Watt Resistors     r4
NOS Box of Ten Ohmite Brown Devil 100 Ohm 20 Watt Resistors r4
$19.95
quality
Ohmite 0378 Variable Resistor 25 Watts 2500 Ohms
Ohmite 0378 Variable Resistor 25 Watts 2500 Ohms
$22.00
quality
Ohmite Power Resistor 5 Ohm 100W 28P289
Ohmite Power Resistor 5 Ohm 100W 28P289
$7.95
quality
Ohmite Resistor 175W 100 NOS
Ohmite Resistor 175W 100 NOS
$19.99
quality
OHMITE D222K1R0 RESISTOR
OHMITE D222K1R0 RESISTOR
$21.99
quality
Ohmite RJS800 Resistor 800 Ohms 0250A No Wires
Ohmite RJS800 Resistor 800 Ohms 0250A No Wires
$19.95
quality
Resistor 1000 ohms 25 watts adjustable OHMITE 5pcs
Resistor 1000 ohms 25 watts adjustable OHMITE 5pcs
$14.99
quality
LOT OF FIVE OHMITE RESISTORS 1360 100OHMS 210 225P 46
LOT OF FIVE OHMITE RESISTORS 1360 100OHMS 210 225P 46
$50.00
quality
OHMITE L225J150 150 OHM 225W RESISTORS NEW IN BOX 10 1 4 LONG
OHMITE L225J150 150 OHM 225W RESISTORS NEW IN BOX 10 1 4 LONG
$14.99
quality
Ohmite VitreousEnameled resistors L50J1K5 50 Watt lot of 2
Ohmite VitreousEnameled resistors L50J1K5 50 Watt lot of 2
$9.99
quality
New Ohmite 23J1K5 Axial Wirewound Resistors 15K Ohm 3W 5 QTY 25
New Ohmite 23J1K5 Axial Wirewound Resistors 15K Ohm 3W 5 QTY 25
$39.95
quality
LOT OF FOUR OHMITE RESISTORS 25OHMS D225K25R
LOT OF FOUR OHMITE RESISTORS 25OHMS D225K25R
$80.00
quality
Vintage Ohmite Rite Ohm 81A Pie Wound Precision Resistor 319319 6 2000 Ohms
Vintage Ohmite Rite Ohm 81A Pie Wound Precision Resistor 319319 6 2000 Ohms
$32.50
quality
OHMITE DIVIDOHM  0956 100 5 OHMS VAR RESISTOR NOS ORIGINAL BOX VTG
OHMITE DIVIDOHM 0956 100 5 OHMS VAR RESISTOR NOS ORIGINAL BOX VTG
$19.99
quality
Ohmite 0960 Vitreous Enameled Resistor 100Watts 100OHMS
Ohmite 0960 Vitreous Enameled Resistor 100Watts 100OHMS
$9.00
quality
NEW OHMITE  B5J10R RESISTOR 10 OHMS 525 WATTS
NEW OHMITE B5J10R RESISTOR 10 OHMS 525 WATTS
$3.80
quality
Ohmite D100K1K5 Vitreous Enameled Resistor 100Watts 15k OHMS
Ohmite D100K1K5 Vitreous Enameled Resistor 100Watts 15k OHMS
$10.00
quality
Ohmite L100J2R0 Vitreous Enameled Resistor 100Watts 2OHMS
Ohmite L100J2R0 Vitreous Enameled Resistor 100Watts 2OHMS
$12.00
quality
Ohmite L100J750 Vitreous Enameled Resistor 100Watts 750OHMS
Ohmite L100J750 Vitreous Enameled Resistor 100Watts 750OHMS
$15.00
quality
OHMITE WIREWOUND RESISTORS B20KR50 QTY 22
OHMITE WIREWOUND RESISTORS B20KR50 QTY 22
$45.00
quality
LOT OF 2 NEW OHMITE  95J5R0 RESISTORS 5 OHMS 5 WATTS
LOT OF 2 NEW OHMITE 95J5R0 RESISTORS 5 OHMS 5 WATTS
$6.50
quality
Ohmite D175K250 Vitreous Enameled Resistor 175Watts 250OHMS
Ohmite D175K250 Vitreous Enameled Resistor 175Watts 250OHMS
$40.00
quality
NIB OHMITE LUG RESISTOR C300KR12
NIB OHMITE LUG RESISTOR C300KR12
$30.61
quality
NEW OHMITE  B12J2R0 RESISTOR 2 OHMS 12 WATTS
NEW OHMITE B12J2R0 RESISTOR 2 OHMS 12 WATTS
$6.50
quality
NEW OHMITE  B12J3R0 RESISTOR 3 OHMS 12 WATTS
NEW OHMITE B12J3R0 RESISTOR 3 OHMS 12 WATTS
$7.50
quality
NEW OHMITE  B12J1R0 RESISTOR 1 OHMS 12 WATTS
NEW OHMITE B12J1R0 RESISTOR 1 OHMS 12 WATTS
$5.50
quality
LOT of 12 Ohmite Resistor Wirewound 47 OHM 225W 5 92J47R NEW
LOT of 12 Ohmite Resistor Wirewound 47 OHM 225W 5 92J47R NEW
$15.00
quality
4 large power resistors Ohmite 300 watt 010 ohms each
4 large power resistors Ohmite 300 watt 010 ohms each
$5.00
quality
RESISTOR OHMITE POWER RIB 11OHMS PFR5K11RO
RESISTOR OHMITE POWER RIB 11OHMS PFR5K11RO
$129.00
quality
Ohmite Resistor 25 Watts 1500 Ohms Dividohm New
Ohmite Resistor 25 Watts 1500 Ohms Dividohm New
$10.00
quality
2500 OHM Resistor Ohmite L50J2K5 50 WATTS 25k 2500 OHMS NIB 1 Lot of 4
2500 OHM Resistor Ohmite L50J2K5 50 WATTS 25k 2500 OHMS NIB 1 Lot of 4
$28.00
quality
Vintage Electronic Part Ohmite Resistor 2403
Vintage Electronic Part Ohmite Resistor 2403
$19.95
quality
Ohmite D75K250 Power Braking Resistor 250Ohm 75W NEW
Ohmite D75K250 Power Braking Resistor 250Ohm 75W NEW
$25.00
quality
Ohmite 270 100M 40 Resistor
Ohmite 270 100M 40 Resistor
$39.99
quality
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Ohmite Resistors

See More About:    Ohmite Resistor        
680V over OHMITE 100 ohm 225W resistor

The Test Methods and Experiences of 8 Resistors

1. Fixed Resistor Testing.

A. Connect the two probes(regardless of positive and negative) to the pins of resistors respecially, the actual resistance value will be measured. In order to improve the measurement accuracy, the measured resistance should be based on the size of the nominal value to select the range. As the scale of the nonlinear Ohm's block, dividing it in the middle of a more refined, pointer indicates the value should be possible to scale fell on the middle position, that is the start of full scale of 20% to 80% within the arc to make the measurements more accurate. According to a different level of resistance error. Reading between the nominal resistance were allowed ± 5%, ± 10% or ± 20% error. If we do not match, beyond the error range, then the resistance value change the value.

B. Note: When you are testing, particularly in the resistance measured over tens of kΩ resistor, hands do not touch the probe and resistance of the conductive part; be detected in the welding of the resistance from the circuit down, at least open a welding head, in order to avoid circuit The impact on other components of the test, resulting in measurement residual; the resistance value of color ring resistor can be able to determined by color ring marks, but is best to test the actual resistance using a multimeter.

2. Cement Resistance Testing.

Detection of resistance of cement and precautions to ordinary fixed resistor with the same test.

3. Fuse Resistors Test.

In the circuit, when the fuse resistor fuse open, you can make judgments based on experience: If it is found fuse resistors or charred black surface, it can be concluded that the overload rating of the current through it many times over due; If the surface without any trace of the open, it indicates that the current flow is equal to or just greater than the rated fuse value of sales. For the surface without any trace of the fuse resistor to judge good or bad, can make use of the multimeter to measure the R × 1 block, to ensure accurate measurement, it should fuse resistors from the circuit on one end of the next weld. If the measured resistance is infinite, then the fuse has failed open circuit resistor, if the measured resistance falls far short of the nominal value, that value of resistance change, we should not be used. In the maintenance of practice found that a small number of resistors in the circuit fuse is short breakdown phenomenon, attention should also be detected.

4. Potentiometer Detection.

Check the potentiometer, the first to turn the rotating handle, turn handle to see whether the smooth rotation, the switch is flexible, switch-pass, short "clicks" is crisp, and listen to the potentiometer and the resistance of the contact point within the body of friction sound, if any "imperfections" sound, indicating poor quality. Test with a multimeter, the first based on the size of the measured resistance of the potentiometer, the appropriate choice of a good multimeter resistance gear, and then according to the following method for testing.

A. Measured with a multimeter's ohm block "1" "2" at both ends, the reading should be nominal for the potentiometer resistance, such as the meter pointer does not move a lot of difference, or resistance, it indicates that the potentiometer is damaged.

B. Detect whether the activities of the potentiometer arm and the resistance of film contact is good or not. The ohm meter test block with "1" "2" ("2" "3") ends of the potentiometer shaft counterclockwise rotation to close the "off" position, when the resistance value as possible. Handle clockwise rotation axis and then slowly, the resistance value should be increased gradually, the pointer in the header should be a smooth move. When the spin axis of the handle to the extreme position of "3", the resistance should be close to the nominal value of the potentiometer. If the multimeter pointer handle potentiometer shaft rotation in the process of jumps, indicating active fault contacts are bad.

5. Positive Temperature Coefficient Thermistor (PTC) Detection.

When detecting, with a multimeter R × 1 block, concrete and two-step operation:

A. Room Temperature Testing (room temperature close to 25 ℃): the two probes touch the two pins PTC thermistors measure the actual resistance, and with the relative ratio of the nominal resistance, the difference between the two is the normal within the ± 2Ω. If the nominal resistance and the resistance of the actual difference is too large, then the performance is bad or damaged.

B. Heating Test: at room temperature, on the basis of the tests are normal, then a second step tests - heat detection, to a heat source (such as electric iron) near the PTC thermistor to its heating, while monitoring the resistance with a multimeter if the value increases with increasing temperature, and if so, that the normal thermal resistance, if resistance did not change, indicating that its performance became inferior and can not be used. Careful not to heat with the PTC thermistor by too close or direct contact with the thermistor in order to prevent their ruined.

6. Negative Temperature Coefficient Thermistor (NTC) Testing.

(1) Measured nominal resistance value Rt NTC thermistor with a multimeter measuring methods and measuring the same way as ordinary fixed resistor, which according to the nominal resistance of NTC thermistor select the appropriate power block can be directly measured actual Rt value. But NTC thermistor is sensitive to temperature, so the test should note the following:

A. Rt is the manufacturer at an ambient temperature measured at 25 ℃, so the Rt measured with a multimeter when the ambient temperature should also be close to 25 ℃, in order to ensure the credibility of the test.

B. Measurement of power shall not exceed the specified value, so that the current measurement error caused by thermal effects.

C. It is operating correctly. Test, and hold your hands to prevent the body temperature of the test impact.

(2) Estimate the temperature coefficient "at"

First measured the value of t1 resistance Rt1 at room temperature, then electric soldering iron for heat, close to the thermistor Rt, measure the resistance RT2, also measured with a thermometer at this time the surface of the thermistor RT and then calculated the average temperature t2.

7. Varistor Testing.

R × 1k with a multimeter to measure the varistor block between the two pins is, the reverse insulation resistance, are infinite, otherwise, that leakage current. If the measured resistance is very small, indicating varistor is damaged, can not be used.

8. Photosensitive Resistance Testing.

A. With a black piece of paper to cover the window light sensitive resistor, when the multimeter pointer remained fixed, the resistance approaches infinity. This value shows the bigger the better performance of photosensitive resistance. If this value is very small or close to zero, indicating photoresistor has burn damage, can not continue to use.

B. Will be a light transmittance of the window aligned photosensitive resistance, when the multimeter pointer swing should be more substantial, more resistance was significantly reduced. The smaller this value the better the performance that photosensitive resistance. If this value is large or even infinite, indicating that the resistance of the internal open-photosensitive damage, can no longer continue.

C. The photosensitive resistor light window light rays aligned with the black pieces of paper on top of the window shade photoresistors shaking, it stopped by the light, this time with the black pieces of paper multimeter pointer should be shaking and side to side. If the meter pointer position does not always stop with the paper in a rock and swing, indicating resistance of the photosensitive photosensitive materials have been damaged.

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