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Old 4th May 2009, 10:45 PM   #1
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Default Transistor matching

Hello

I wonder if anyone could explain the process of selecting transistors for specific parameters such as gain etc, I often wondered especially now as I am about to modify my Hart/JLH class A amps.

Thanks

Graham
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Old 6th May 2009, 08:21 PM   #2
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Personally, I think it best to use a test circuit similiar to the final circuit you are going to use the transistor in, not a 9 volt battery. You have to operate the transistor close the voltage level in the final circuit and measure collector current. You will find that the transistors you bought vary much so buy about a 100. Ray
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