testing transistors

[lilshawn]

I'm looking to "stress test" some TO-3 transistor pairs. 2N6284 and 2N6287's. these transistors are often counterfeited and sold as name brands due to their high price. I have a B&K 510 transistor checker, but often even with known blown transistors, they test as fine since a low voltage is used to test the simple switching function.

I'd like to build a test bed that i can insert a single or a pair and stress test them to...

1: determine if the transistors are good.
B: determine if they are rated for what they are supposed to be. high voltage, high amperage etc.
4: test "failed" transistors to see if they are in fact failed and not just another part of the circuit.


anybody know where i might start with this? i'm thinking a box with a power supply and some pushbuttons to apply voltage and amp meters to measure current draw and LED's to verify input,output.

[spoot]

Not real familiar with this stuff..........but this German one might be a good basis to build off of?

http://www.mikrocontroller.net/articles/AVR-Transistortester

[ed12]

shawn
look up >peek<
look for dac77 or 75 ?
1 of them is a curve tracer
this is what u want
about $150.00 landed at your door
for any darlinton pair it is a must..hence the term :pair:

ed