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How can I test an RF transistor to see if its good or busted?

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LAN_403

zero_coke

Tue Mar 19 2013, 03:17AM

Registered Member #8368 Joined: Wed Nov 28 2012, 04:11AM
Location:
Posts: 9

I have the MRF454 transistors and I need to test to see if I've damaged them or not. What's an accurate way of doing this?

Thanks!

zero_coke

Tue Mar 19 2013, 05:46AM

Registered Member #8368 Joined: Wed Nov 28 2012, 04:11AM
Location:
Posts: 9

Nevermind...I'll just see if the voltage drops are 0.4-0.7 V between Base and Collector and between Base and Emitter using the diode test function.

Shrad

Tue Mar 19 2013, 08:37AM

Registered Member #3215 Joined: Sun Sept 19 2010, 08:42PM
Location:
Posts: 780

you could setup a small class A amplifier and stick it to the reference signal of your oscilloscope.. or setup a small oscillator

WaveRider

Tue Mar 19 2013, 08:43AM

Registered Member #29 Joined: Fri Feb 03 2006, 09:00AM
Location: Hasselt, Belgium
Posts: 500

If the base bias voltage looks right and collector current behaves consistently, then the transistor is in all likelihood good. The back-to-back diode test is a good test of the BE-BC junctions as well...

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