diff --git a/gcom2.f90 b/gcom2.f90
index 071f36ed3..fbb5533b5 100644
--- a/gcom2.f90
+++ b/gcom2.f90
@@ -17,7 +17,6 @@ integer ndecoding      !Decoder status (see decode2.f90)     GUI,Decoder
 integer ndecoding0     !Status on previous decode            GUI,Decoder
 integer mousebutton    !Which button was clicked?               GUI
 integer multicast      !1 for multicast data, 0 for unicast     GUI
-integer nagc           !Set to 1 to activate waterfall AGC      GUI
 integer ndecdone       !Is decoder finished?                 GUI,Decoder
 integer npingtime      !Time in file of mouse-selected ping  GUI,Decoder
 integer ierr           !(why is this here?)
@@ -107,7 +106,7 @@ character*8 utcdata     !HHMM UTC for the processed data       Decoder
 
 common/gcom2/ps0(431),psavg(450),s2(64,3100),ccf(-5:540),                   &
      green(500),fselect,pctlost,fcenter,rxnoise,dphi,ngreen,dgain,iter,     &
-     ndecoding,ndecoding0,mousebutton,multicast,nagc,                       &
+     ndecoding,ndecoding0,mousebutton,multicast,                            &
      ndecdone,npingtime,ierr,lauto,mantx,nrestart,ntr,nmsg,nsave,nadd5,     &
      dftolerance,LDecoded,rxdone,monitoring,nzap,minsigdb,                  &
      nclearave,nfreeze,nafc,ncsmin,newspec,nfa,nfb,nfcal,idphi,nkeep,       &
diff --git a/map65.py b/map65.py
index 6618b2b87..2b7bca6e4 100644
--- a/map65.py
+++ b/map65.py
@@ -1072,17 +1072,11 @@ def update():
         Audio.gcom2.dftolerance=500
         fqso0=int(Audio.gcom2.mousefqso)
 
-#    if mode.get()[:4]=='JT65' and (Audio.gcom2.ndecoding>0 or \
-#         (isec>45 and  txminute==0 and Audio.gcom2.monitoring==1 and \
-#    if isec != isec00:
-#        print isec,Audio.gcom2.ndecoding,txminute,Audio.gcom2.monitoring, \
-#            Audio.datcom.kkdone
-#        isec00=isec
-
-    if mode.get()[:4]=='JT65' and (Audio.gcom2.ndecoding>0 or \
-         (isec>=options.nt1.get() and txminute==0 and \
-          Audio.gcom2.monitoring==1 and \
-          Audio.datcom.kkdone!=-99 and Audio.gcom2.ndiskdat!=1)):
+##    if mode.get()[:4]=='JT65' and (Audio.gcom2.ndecoding>0 or \
+##         (isec>=options.nt1.get() and txminute==0 and \
+##          Audio.gcom2.monitoring==1 and \
+##          Audio.datcom.kkdone!=-99 and Audio.gcom2.ndiskdat!=1)):
+    if mode.get()[:4]=='JT65' and Audio.gcom2.ndecoding>0:
 #Set button bg while decoding
         bc='#66FFFF'
         bdecode.configure(bg=bc,activebackground=bc,state=DISABLED)
diff --git a/spec.f90 b/spec.f90
index db5f34e9c..10d363e86 100644
--- a/spec.f90
+++ b/spec.f90
@@ -72,7 +72,7 @@ subroutine spec(brightness,contrast,ngain,nspeed,a,a2)
   do i=ia,ib
      n=savg2(i) * (300.0/ave)
      if(n.gt.1000) n=1000
-     hist(n)=hist(n)+1
+     if(n.ge.0 .and. n.le.1000) hist(n)=hist(n)+1
   enddo
 
   sum=0.
diff --git a/specjt.py b/specjt.py
index c8194b801..47d82db30 100644
--- a/specjt.py
+++ b/specjt.py
@@ -47,7 +47,6 @@ mode0=""
 mousedf0=0
 mousefqso0=0
 dftolerance0=500
-display_agc=IntVar()
 naxis=IntVar()
 ncall=0
 newMinute=0
@@ -377,7 +376,6 @@ def update():
         frange0=frange
     Audio.gcom2.nfmid=int(fmid)
     Audio.gcom2.nfrange=int(frange)
-    Audio.gcom2.nagc=display_agc.get()
 
     ltime.after(200,update)                      #Reset the timer
 
@@ -474,7 +472,6 @@ sc3=Scale(iframe2,from_=-100.0,to_=100.0,orient='horizontal',
     showvalue=0,sliderlength=5)
 sc3.pack(side=LEFT)
 balloon.bind(sc3,"Gain", "Digital Gain")
-Checkbutton(iframe2,text='Waterfall AGC',variable=display_agc).pack(side=RIGHT)
 iframe2.pack(expand=1, fill=X)
 
 #----------------------------------------------- Restore params from INI file
@@ -496,7 +493,6 @@ try:
             sc2.set(value)
             c0=sc2.get()
         elif key == 'DigitalGain': sc3.set(value)
-        elif key == 'DisplayAGC': display_agc.set(value)
         elif key == 'AxisLabel': naxis.set(value)
         elif key == 'MarkTones': nmark.set(value)
         elif key == 'Flatten': nflat.set(value)
@@ -565,7 +561,6 @@ f.write("UpdateInterval " + str(nspeed0.get()) + "\n")
 f.write("Brightness " + str(b0)+ "\n")
 f.write("Contrast " + str(c0)+ "\n")
 f.write("DigitalGain " + str(g0)+ "\n")
-f.write("DisplayAGC " + str(display_agc.get())+ "\n")
 f.write("AxisLabel " + str(naxis.get()) + "\n")
 f.write("MarkTones " + str(nmark.get()) + "\n")
 f.write("Flatten " + str(nflat.get()) + "\n")
diff --git a/symspec.f90 b/symspec.f90
index c201d916e..097007d48 100644
--- a/symspec.f90
+++ b/symspec.f90
@@ -22,7 +22,6 @@ subroutine symspec(id,kbuf,kk,kkdone,nutc,newdat)
        kbuf,kk,kkdone,ndecoding,newdat,n
 3001 format('s1:',i5.4,i3.2,i5,2i10,2i3,i5)
   fac=0.0002
-  if(nagc.ne.0) fac=0.0002 * 10.0**(0.05*(-rxnoise))
   hsym=2048.d0*96000.d0/11025.d0          !Samples per half symbol
   npts=hsym                               !Integral samples per half symbol
   ntot=322                                !Half symbols per transmission