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Message |
    
Motes7
New member
Username: Motes7
Post Number: 9
Registered: 10-2007
| | Posted on Saturday, December 22, 2007 - 1:32 pm: | 
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Can anyone tell me the proper way to test say sc2879, or 2290 pills. I keep testing them the same way I test npn or pnp transitors, but something keeps telling me that ain't right.
Thanks in advance.
WTX-241
CEF# 952
West Texas Rebel
28.285 AM
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Derek460
Junior Member
Username: Derek460
Post Number: 10
Registered: 11-2007
| | Posted on Sunday, December 23, 2007 - 10:12 pm: |
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this is a great ? i hope someone knows the awnser to this wish i could help , i had some pills tested once and the guy had a little jumper thing that told him if they were good .
CEF# 961 Local Handle CopenHagen
Getting down like charlie brown
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Bruce
Senior Member
Username: Bruce
Post Number: 4562
Registered: 9-2003
| | Posted on Monday, December 24, 2007 - 3:05 pm: |
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The problem is many power transistors are not only ONE transistor. Some have several together in that " pill ". The only way I trust testing them is it shows OPEN or SHORTED .... otherwise I would not count on a tester.
On 6 since 66
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Kf4gyp
New member
Username: Kf4gyp
Post Number: 3
Registered: 11-2009
| | Posted on Sunday, December 13, 2009 - 9:40 pm: |
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first thing to do is get the data sheets on the type of transistor you want to test. figureout if it is a darlington configuration or just a plane standard transistor. if it is just a plain jane on the diode checker setting of the meter the base should read .6-.7 forward biased and extreamly high resistance revers biased. |
Five
Junior Member
Username: Five
Post Number: 33
Registered: 7-2009
| | Posted on Monday, December 14, 2009 - 5:58 pm: |
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I test them with an older radio shack transistor tester that has the three leads, black red and green and the female plug built in. This tester has the knob for HFe and the little red LED it works good for matching transistors and giving a go/no/go test. Oh it also has the pnp/npn switch never had it give me a false reading. Some meters have the same setup and will work also. Hope this helps |
