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s icom <dg8fz @ww $905261dg8fz #0 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
73 de karl dg8fz @ db0sao.deu.eu 26.mai.90 14ut32
***end
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