Posted by Wayne Parham [ 70.234.134.147 ] on April 16, 2008 at 16:05:32:
In Reply to: Need Hitachi k149 and j49 replacements posted by Mr vinyl on April 15, 2008 at 18:17:35:
I would contact Hitachi and get data sheets for the two transistors. You should be able to find compatible parts, maybe ones that exceed the original specs. Match Hfe, match or exceed Vceo and Vcbo and match or exceed Ic and Pt.
I would replace both channels with matched pairs. If you can't find matched pairs, you may have to buy a small lot and measure them yourself for matching purposes.
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