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I have more than a few of the origonal sanyo transistors left, but have my doubts as to the real effectiveness of them. Even doing an HFE test on them and using the highest gain ones I could find,  I never really seen a noticeable improvement. I wouldn't bother doing this mod on any of the "newer" chasis designs being made today as the first Rx amp already has a higher gain than their older through hole counterparts (1674) had, And what this modification was origionaly ment for.

 

Good luck:)

 

Oh, and I think there was a thread on here somewhere where this modification was tested in great detail and still was no real evidence that the mod worked.