diff --git a/lib/Makefile.jtsdk b/lib/Makefile.jtsdk
index 4580414e8..135804caf 100644
--- a/lib/Makefile.jtsdk
+++ b/lib/Makefile.jtsdk
@@ -28,7 +28,7 @@ CFLAGS = -I. -fbounds-check -mno-stack-arg-probe
 %.o: %.F90
 	${FC} ${FFLAGS} -c $<
 
-all:    libjt9.a libastro.a jt9.exe jt9code.exe jt65code.exe 
+all:    libjt9.a libastro.a jt9.exe jt9code.exe jt65code.exe jt9sim.exe
 
 OBJS1 = pctile.o graycode.o sort.o ssort.o chkmsg.o \
 	unpackmsg.o igray.o unpackcall.o unpackgrid.o \
diff --git a/lib/jt9sim.f90 b/lib/jt9sim.f90
index f4f0cf62f..004281dff 100644
--- a/lib/jt9sim.f90
+++ b/lib/jt9sim.f90
@@ -19,8 +19,8 @@ program jt9sim
 
   nargs=iargc()
   if(nargs.ne.6) then
-     print*,'Usage: jt9sim "message" fspan nsigs minutes SNR nfiles'
-     print*,'Example:  "CQ K1ABC FN42" 200  20      2    -28    1'
+     print*,'Usage:   jt9sim "message"     fspan nsigs minutes SNR nfiles'
+     print*,'Example: jt9sim "CQ K1ABC FN42" 200  20      2    -28    1'
      print*,' '
      print*,'Enter message = "" to use entries in msgs.txt.'
      print*,'Enter SNR = 0 to generate a range of SNRs.'
@@ -54,7 +54,9 @@ program jt9sim
   if(minutes.eq.30) nsps=252000
   if(nsps.eq.0) stop 'Bad value for minutes.'
 
-  f0=1400.d0                         !Center frequency (Hz)
+!  f0=1400.d0                         !Center frequency (Hz)
+  f0=3000.d0                         !Center frequency (Hz)
+
 !  f0=1500.0
 !  if(minutes.eq.5)  f0=1100.
 !  if(minutes.eq.10) f0=1050.
@@ -65,7 +67,7 @@ program jt9sim
 
   if(msg0(1:3).eq.'sin') read(msg0(4:),*) sinfreq
   
-  open(12,file='msgs.txt',status='old')
+  if(message.eq."") open(12,file='msgs.txt',status='old')
 
   write(*,1000)
 1000 format('File  N    freq      S/N  Message'/    &
@@ -88,7 +90,7 @@ program jt9sim
      endif
 
      if(msg0.ne.'                      ') then
-        call genjt9(message,msgsent,i4tone) !Encode message into tone #s
+        call genjt9(message,0,msgsent,i4tone,itext) !Encode message into tone #s
      endif
 
      rewind 12
@@ -154,8 +156,8 @@ program jt9sim
            i4=-10
            if(i1Bits(i).eq.1) i4=10
            i4=i4+128
-           if(i4.le.127) i1SoftSymbols(k)=i4
-           if(i4.ge.128) i1SoftSymbols(k)=i4-256
+           if(i4.le.127) i1SoftSymbols(i)=i4
+           if(i4.ge.128) i1SoftSymbols(i)=i4-256
         enddo
         limit=1000
         call decode9(i1SoftSymbols,limit,nlim,msg)
diff --git a/lib/t1.f90 b/lib/t1.f90
deleted file mode 100644
index e15337dfc..000000000
--- a/lib/t1.f90
+++ /dev/null
@@ -1,32 +0,0 @@
-program t1
-
-  character*22 msg
-  character*12 arg
-  complex c3(0:4096-1)
-  complex c5(0:4096-1)
-
-  call getarg(1,arg)
-  read(arg,*) nfile
-
-  do ifile=1,999
-     read(51,end=999) nutc,nsnr,xdt,nfreq,msg,c3,c5
-     write(*,1010) ifile,nutc,nsnr,xdt,nfreq,msg
-1010 format(3i6,f7.1,i6,2x,a22)
-
-     if(ifile.eq.nfile) then
-        c3=c5
-        c3(1353:)=0
-        call four2a(c3,2048,1,-1,1)
-
-        df=12000.0/(128.0*2048.0)
-        do i=0,2048
-           freq=i*df
-           if(i.ge.1024) freq=(i-2048)*df
-           s=1.e-4*(real(c3(i))**2 + aimag(c3(i))**2)
-           write(13,3001) i,freq,s
-3001       format(i6,2f10.3)
-        enddo
-     endif
-  enddo
-
-999 end program t1