diff --git a/lib/fsk4hf/ft8_params.f90 b/lib/fsk4hf/ft8_params.f90
index 6643e7762..510b07b49 100644
--- a/lib/fsk4hf/ft8_params.f90
+++ b/lib/fsk4hf/ft8_params.f90
@@ -2,7 +2,7 @@
 parameter (KK=87)                     !Information bits (75 + CRC12)
 parameter (ND=58)                     !Data symbols
 parameter (NS=21)                     !Sync symbols (3 @ Costas 7x7)
-parameter (NN=NS+ND)                  !Total symbols (79)
+parameter (NN=NS+ND)                  !Total channel symbols (79)
 parameter (NSPS=2048)                 !Samples per symbol at 12000 S/s
 parameter (N7=7*NSPS)                 !Samples in Costas 7x7 array (14,336)
 parameter (NZ=NSPS*NN)                !Samples in full 15 s waveform (161,792)
diff --git a/lib/fsk4hf/ft8d.f90 b/lib/fsk4hf/ft8d.f90
index 5adbf5ed2..a2a5bd8e6 100644
--- a/lib/fsk4hf/ft8d.f90
+++ b/lib/fsk4hf/ft8d.f90
@@ -51,7 +51,7 @@ program ft8d
      tstep=0.5*NSPS/12000.0
      df=12000.0/NFFT1
      i0=nint(f1/df)
-     j0=nint((xdt+0.5)/tstep)
+     j0=nint(xdt/tstep)
      fac=20.0/maxval(s)
      s=fac*s
 
@@ -59,17 +59,18 @@ program ft8d
      ia=i0
      ib=i0+14
      do k=1,NN
-        n=j0+2*(k-1)+1
         if(k.le.7) cycle
         if(k.ge.37 .and. k.le.43) cycle
         if(k.gt.72) cycle
+        n=j0+2*(k-1)+1
+        if(n.lt.1) cycle
         j=j+1
         s1(0:7,j)=s(ia:ib:2,n)
      enddo
 
      do j=1,ND
         ps=s1(0:7,j)
-!        ps=log(ps)
+        ps=log(ps)
         r1=max(ps(1),ps(3),ps(5),ps(7))-max(ps(0),ps(2),ps(4),ps(6))
         r2=max(ps(2),ps(3),ps(6),ps(7))-max(ps(0),ps(1),ps(4),ps(5))
         r4=max(ps(4),ps(5),ps(6),ps(7))-max(ps(0),ps(1),ps(2),ps(3))
@@ -95,15 +96,12 @@ program ft8d
      message='                      '
      if(ifer.eq.0) then
         call extractmessage174(decoded,message,ncrcflag,recent_calls,nrecent)
-        nsnr=nint(xsnr)
-        nfdot=0
-        write(13,1110) datetime,0,nsnr,xdt,freq,message,nfdot
-1110    format(a11,2i4,f6.2,f12.7,2x,a22,i3)
-        write(*,1112) datetime(8:11),nsnr,xdt,nint(f1),message
-1112    format(a4,i4,f5.1,i6,2x,a22)
      endif
+     nsnr=nint(xsnr)
+     write(13,1110) datetime,0,nsnr,xdt,freq,message,nfdot
+1110 format(a11,2i4,f6.2,f12.7,2x,a22,i3)
+     write(*,1112) datetime(8:11),nsnr,xdt,nint(f1),message
+1112 format(a4,i4,f5.1,i6,2x,a22)
   enddo                                   ! ifile loop
-!  write(*,1120)
-!1120 format("<DecodeFinished>")
 
 999 end program ft8d
diff --git a/lib/fsk4hf/ft8sim.f90 b/lib/fsk4hf/ft8sim.f90
index 4991ce6c9..e7575c578 100644
--- a/lib/fsk4hf/ft8sim.f90
+++ b/lib/fsk4hf/ft8sim.f90
@@ -53,7 +53,7 @@ program ft8sim
 
   phi=0.0
   c0=0.
-  k=-1 + nint((xdt+0.5)/dt)              !Start audio at t=0.5 s
+  k=-1 + nint(xdt/dt)
   do j=1,NN                              !Generate 8-FSK waveform from itone
      dphi=twopi*(f0+itone(j)*baud)*dt
      if(k.eq.0) phi=-dphi
diff --git a/lib/fsk4hf/genft8.f90 b/lib/fsk4hf/genft8.f90
index 9102d1478..7eec636ab 100644
--- a/lib/fsk4hf/genft8.f90
+++ b/lib/fsk4hf/genft8.f90
@@ -36,8 +36,6 @@ subroutine genft8(msg,msgsent,itone)
 1003 format(12b6.6,b3.3,b12.12)
   read(cbits,1004) msgbits
 1004 format(87i1)
-  print*,cbits
-  print*,icrc12
   
   call encode174(msgbits,codeword)      !Encode the test message
 
diff --git a/lib/fsk4hf/sync8.f90 b/lib/fsk4hf/sync8.f90
index 019f830a3..8edadd467 100644
--- a/lib/fsk4hf/sync8.f90
+++ b/lib/fsk4hf/sync8.f90
@@ -2,17 +2,14 @@ subroutine sync8(iwave,xdt,f1,s)
 
   include 'ft8_params.f90'
   parameter (IZ=10,JZ=20)
-  character*1 line(-JZ:JZ),mark(0:6)
   complex cx(0:NH1)
   real s(NH1,NHSYM)
   real savg(NH1)
   real x(NFFT1)
   real sync2d(-IZ:IZ,-JZ:JZ)
   integer*2 iwave(NMAX)
-  integer iloc(1)
   integer icos7(0:6)
   data icos7/2,5,6,0,4,1,3/                   !Costas 7x7 tone pattern
-  data mark/' ',' ','.','-','+','X','$'/
   equivalence (x,cx)
 
 ! Compute symbol spectra at half-symbol steps.  
@@ -50,7 +47,7 @@ subroutine sync8(iwave,xdt,f1,s)
   tmax=0.
   ipk=0
   jpk=0
-  j0=1 + nint(0.5/tstep)
+  j0=1
   do i=-IZ,IZ
      do j=-JZ,JZ
         t=0.