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OHMITE 0963 DIVIDOHM ADJ WIREWOUND RESISTOR 25K OHMS 2500 OHMS 100W W BRKT $14.97 |
OHMITE 0963 DIVIDOHM ADJ WIREWOUND RESISTOR 25K OHMS 2500 OHMS 100W W BRKT NIB $21.97 |
OHMITE 0782B DIVIDOHM ADJ WIREWOUND RESISTOR 4K OHMS 4000 OHMS 75W W BRKT NIB $18.97 |

OHMITE 0782B DIVIDOHM ADJ WIREWOUND RESISTOR 4K OHMS 4000 OHMS 75W W BRKT NNB $17.97 |
OHMITE 0964 DIVIDOHM ADJ WIREWOUND RESISTOR 5K OHMS 5000 OHMS 100W W BRKT NIB $21.97 |
OHMITE 0964 DIVIDOHM ADJ WIREWOUND RESISTOR 5K OHMS 5000 OHMS 100W W BRKT NNB $20.97 |

NEW OHMITE D225K50R RESISTOR $25.00 |
Ohmite Powr rib Resistor PFE5K3R50 $20.00 |
94pcs OHMITE 45F1K0 Wirewound Resistors Through Hole 5watt 1K 1 Axial $40.00 |

Ohmite E300K4R0E 4 ohm 300w 10 Resistor $27.95 |
OHMITE D25K3R0 Bracket Mount Resistor 3 OHM Variable Center Tap 25 WATT $6.00 |
Ohmite L225J5K0 5K Ohm 225W 5 Resistor $19.95 |

Ohmite D175K25RE 25 Ohm 175W 10 Resistor accessory $27.95 |
2 Vtg OHMITE P RHEOSTAT 3 Ohm 866A 02 Ohm 15A Power Wirewound Resistor 5 200W $59.99 |
Ohmite E300K6R3 63 Ohm 300W 10 Resistor $27.95 |

OHMITE 0783C DIVIDOHM ADJ WIREWOUND RESISTOR 7K OHMS 7000 OHMS 75W W BRKT NIB $18.97 |
OHMITE 0783C DIVIDOHM ADJ WIREWOUND RESISTOR 7K OHMS 7000 OHMS 75W W BRKT NNB $17.97 |
OHMITE 0783C DIVIDOHM ADJ WIREWOUND RESISTOR 7K OHMS 7000 OHMS 75W W BRKT $11.97 |

OHMITE 0966 DIVIDOHM ADJ WIREWOUND RESISTOR 15K OHMS 15000 OHMS 100W W BRKT NNB $20.97 |
Ohmite C300K3R1 31 Ohm 300W 10 Resistor accessory $21.95 |
NEW 95J1R5 4534 Ohmite 5w watt 15 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $1.84 |

OHMITE RESISTOR 850F25R 25OHMS NEW $5.00 |
10 Ohmite R3J15R PC 58 Series 15 Ohm 3W 5 Vitreous Enamel Wirewound Resistors $19.99 |
OHMITE RESISTORS M270 2259 46 120 OHMS $30.00 |

OHMITE L100J2R0 RESISTOR NIB NOS Lot of 8 $27.00 |
NEW 95J3R0 4542 Ohmite 5w watt 30 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $1.84 |
PACK OF 5 OHMITE 4766 90J39R 39 OHM WIREWOUND 11 WATT RESISTOR $13.00 |

NEW 95J22R 4569 Ohmite 5w watt 22 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $1.84 |
OHMITE 30 OHM RESISTOR 80025 455 01 $15.00 |
NEW 95J40R 4577 Ohmite 5w watt 40 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $1.84 |

NEW 95J30R 4573 Ohmite 5w watt 30 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $1.84 |
NEW 95J51R 4581 Ohmite 5w watt 51 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $2.89 |
Qty 10 Resistor 0050 Ohms R05 1 3W Ohmite 13FR050E $9.25 |

Qty 10 Resistor 0200 Ohms 1 3W Ohmite 13FR200E $9.25 |
Ohmite 0705 Wire Wound Resistor 150 OHM 175W NNB $12.75 |
Ohmite 7905 Wire Wound Resistor 5 OHM 225W USG $12.75 |

OHMITE VITREOUS ENAMELED RESISTORS LUG RESISTOR L225J2R0 225 WATT S2 1 71D $24.99 |
NEW 95J68R 4585 Ohmite 5w watt 68 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $2.89 |
OHMITE 0365 25 OHM WIREWOUND DIVIDOHM 25 WATT RESISTOR $6.00 |

OHMITE 270 50K 40 NO 405 1K OHMS X 60 RESISTOR $5.00 |
OHMITE RESISTOR L175J4R0 L175J4RO NEW $15.00 |
NEW 95J75R 4587 Ohmite 5w watt 75 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $2.89 |

NEW 95J85R 4589 Ohmite 5w watt 82 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $2.89 |
NEW 95J120 4594 Ohmite 5w watt 120 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $2.89 |
Ohmite Rheostat 25K Sealed Dustproof WireWound Resistor J 2500 F2 6581 A NNB $14.50 |

NEW 95J150 4596 Ohmite 5w watt 150 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $3.59 |
NEW 95J250 4602 Ohmite 5w watt 250 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $2.49 |
NEW 95J270 4603 Ohmite 5w watt 270 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $1.89 |

OHMITE TAP600K1R0 C4202 10 Ohm Resistor $69.99 |
NEW 95J510 4612 Ohmite 5w watt 510 Ohm Wire Wound Resistor RoHS MIL R 26 1F3501 $3.89 |
NEW 95J2K5 4612 Ohmite 5w watt 2500 25K Ohm Wire Wound Resistor RoHS MIL R 26 $3.89 |

NEW 95J3K0 4635 Ohmite 5w watt 3000 3K Ohm Wire Wound Resistor RoHS MIL R 26 $3.89 |
NEW OHMITE L25J10KE RESISTOR 25W 10000 OHM $7.50 |
6 Vintage Ohmite 40000 Ohm No 0621 Resistors Enameled Porcelain Lug Type $49.50 |

NEW 95J5K6 4644 Ohmite 5w watt 5600 56K Ohm Wire Wound Resistor RoHS MIL R 26 $7.29 |
OHMITE VITREOUS ENAMELED RESISTORS D225K500 WATT 225 $15.00 |
NEW 95J9K0 4652 Ohmite 5w watt 9000 9K Ohm Wire Wound Resistor RoHS MIL R 26 $7.29 |

11 Ohmite 95J10R Power Wirewound Resistors $8.99 |
NEW 95J10K 4654 Ohmite 5w watt 10000 10K Ohm Wire Wound Resistor RoHS MIL R 26 $7.29 |
NEW 95J12K 4654 Ohmite 5w watt 12000 12K Ohm Wire Wound Resistor RoHS MIL R 26 $7.29 |

NEW 95J15K 4654 Ohmite 5w watt 15000 15K Ohm Wire Wound Resistor RoHS MIL R 26 $7.29 |
5 Ohmite 95J10R Power Wirewound Resistors $5.99 |
NEW 95J20K 4661 Ohmite 5w watt 20000 20K Ohm Wire Wound Resistor RoHS MIL R 26 $7.29 |

NEW 95J7K5 4649 Ohmite 5w watt 7500 75K Ohm Wire Wound Resistor RoHS MIL R 26 $7.29 |
10624 New In Box Ohmite D50K250 Power Resistor 50W 250OH $12.33 |
Ohmite 0572 Dividohm Resistor 1k OHMS 50W 0223A $8.00 |

NEW 93J3R0 4342 Ohmite 3 1 4 w watt 3 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |
Heico Ohmite Variable Resistor Spec No 0659 245A 50IOhm Lot of 2 $7.50 |
NEW 93J3R6 4344 Ohmite 3 1 4 w watt 36 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |

20 NEW OHMITE POWER RESISTOR RESISTORS 30 Ohm 25 Watt Watts 5 Tolerance $5.00 |
10 OHMITE 1 4W 470 OHM 5 RC07GF471J CARBON COMPOSITION RESISTOR $5.95 |
NEW 93J4R0 4346 Ohmite 3 1 4 w watt 4 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |

Lot of Ohmite D12K10R Wire Wound Resistor4 $24.99 |
NEW 93J5R0 4349 Ohmite 3 1 4 w watt 5 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |
NEW 93J7R5 4356 Ohmite 3 1 4 w watt 75 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |

NEW 93J12R 4363 Ohmite 3 1 4 w watt 12 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |
OHMITE 5000 OHMS RESISTOR $6.99 |
Ohmite B5J10K Resistor 10000 Ohm $7.95 |

2 Ohmite Power Resistor 270 100M 40 50 5 Ohms $12.00 |
NEW 93J15R 4365 Ohmite 3 1 4 w watt 15 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |
30x Ohmite 45JR10 5W 1 Silicone Ceramic Conformal Axial Wirewound Resistor $19.99 |

OHMITE L100J1K0 RESISTOR 100W 1000 OHM $20.00 |
5 OHMITE DIVIDOHM Resistors 100 Watt Power NOS $9.95 |
NEW 93J20R 4368 Ohmite 3 1 4 w watt 20 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |

NEW 93J22R 4369 Ohmite 3 1 4 w watt 22 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |
10 Ohmite Power Resistors 270 225P 46 1 Ohm Wired in Series $57.00 |
NOS NIB Ohmite Dividohm 100 Watt 15K 15000 Ohms Resistor 0966 Vitreous Enameled $11.50 |

NEW 93J33R 4374 Ohmite 3 1 4 w watt 33 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |
NEW 93J50R 4380 Ohmite 3 1 4 w watt 50 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |
NEW 93J56R 4382 Ohmite 3 1 4 w watt 56 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |

NEW 93J68R 4385 Ohmite 3 1 4 w watt 68 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |
NEW 93J100 4392 Ohmite 3 1 4 w watt 100 Ohm Wire Wound Resistor RoHS MIL R 26 $2.24 |
Lot of 6 Ohmite L100J150 Resistor Power 150 Ohm 100W 5 $30.00 |

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__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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