The transistors are wired in parallel, but that 0 resistance from base
to one of the connections is a shorted junction in one of them. There's
no repair possible for the transistor, it must be replaced. When you
take them out, you can tell which is bad, but a sturdy pair isn't a bad
investment.
.514 is about right for the forward drop of a silicon junction. OL is
right for open. Which a junction should be one way. .000 for both
polarities of the meter shows the shorted junction.
73, Jerry, K0CQ
On 3/12/2011 10:23 PM, Jim Anderson wrote:
After searching Google on how to test a transistor I realized I was doing it
wrong.
Here are the new readings...
On the Diode function and the black lead on the base it reads .514 on one
terminal and .000 on the other
With the red lead on the base it reads OL on one terminal and .000 on the
other.
Both transistors give the same results.
On the 2K ohm scale with the red lead on the base it reads 1.2 on one
terminal and .000 on the other
With the black lead on the base it reads 1.1 on one terminal and .000 on the
other.
Again, both transistors give the same results.
Thanks for sticking with me on this.
Jim
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