IC-471E + Preamp: SP70


Modification for the IC-471E to raise the preamp-current from ~80mA to
~350mA.
PA-Unit :  
 
Q1:  old: D468C  5E 4
     new:
-------
!BD140!
!     !
!E C B!
-!-!-!-
 ! ! +---C
 ! *-----E  <- any small NPN
 ! !   +-B
 ! !   !
 ! E C B    <- old Q1 - pin-names
 +---+
R7:  old: 22 Ohm -> new: 5 Ohm

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