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Done a BUNCH of these mods to my radios and friends' radios.  Never had problem once.  All worked better than before; some better than others.  Depends on the model of radio; but all showed an improvement.  Never needed to re-align the receiver either - after replacing these parts.


Since you had bad results with TWO radios; you must have got the wrong transistors.  The correct transistor has much cleaner amplification specifications.  IF it isn't amping that circuit cleaner; then you got the wrong transistor - or phonies . . .