diff --git a/mainwindow.cpp b/mainwindow.cpp
index de179e94f..f6ed78049 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -393,6 +393,7 @@ MainWindow::MainWindow(bool multiple, QSettings * settings, QSharedMemory *shdme
   m_bTxTime=false;
   m_band00=-1;
   m_rxDone=false;
+  m_bHaveTransmitted=false;
 
   m_fWSPR["160"]=1.8366;                //WSPR frequencies
   m_fWSPR["80"]=3.5926;
@@ -1828,12 +1829,10 @@ void MainWindow::guiUpdate()
       m_tuneup=false;                              //This is not an ATU tuneup
       if(m_pctx==0) m_nrx=1;                       //Don't transmit if m_pctx=0
       bool btx = m_auto and (m_nrx<=0);            //To Tx, we need m_auto and Rx sequsnce finished
-      if(m_ntr == -1) btx=false;                   //Normally, no two consecutive transmissions
+      if(m_bHaveTransmitted) btx=false;            //Normally, no two consecutive transmissions
       if(m_auto and m_txNext) btx=true;            //TxNext button overrides
       if(m_auto and m_pctx==100) btx=true;         //Always transmit
 
-//      qDebug() << "B" << m_pctx << m_auto << m_nrx << m_ntr << m_txNext;
-
       if(btx) {
 // This will be a WSPR Tx sequence. Compute # of Rx's that should follow.
         float x=(float)rand()/RAND_MAX;
@@ -1844,13 +1843,15 @@ void MainWindow::guiUpdate()
           if(x<m_rxavg) m_nrx=1;
         }
         m_ntr=-1;                          //This says we will have transmitted
+        m_bHaveTransmitted=true;
         m_txNext=false;
         ui->pbTxNext->setChecked(false);
-        m_bTxTime=true;                      //Start a WSPR Tx sequence
+        m_bTxTime=true;                    //Start a WSPR Tx sequence
       } else {
 // This will be a WSPR Rx sequence.
         m_ntr=1;                           //This says we will have received
-        m_bTxTime=false;                     //Start a WSPR Rx sequence
+        m_bHaveTransmitted=false;
+        m_bTxTime=false;                   //Start a WSPR Rx sequence
       }
     }
 
@@ -2271,8 +2272,9 @@ void MainWindow::stopTx2()
     m_repeatMsg=0;
   }
   if(m_mode.mid(0,4)=="WSPR" and m_ntr==-1 and !m_tuneup) {
+    m_wideGraph->setWSPRtransmitted();
     if(m_bandHopping) {
-      qDebug () << "Call bandHopping after Tx" << m_tuneup;
+//      qDebug () << "Call bandHopping after Tx" << m_tuneup;
       bandHopping();
     }
     m_ntr=0;
@@ -4337,9 +4339,7 @@ void MainWindow::bandHopping()
     }
   }
 
-  QThread::msleep(1500);
-
-//  qDebug() << nhr << nmin << int(sec) << bname << f0 << 0.000001*f0;
+  QThread::msleep(500);                //### ??? Is this OK to do ??? ###
 
   m_band00=iband;
   auto frequencies = m_config.frequencies ();
diff --git a/mainwindow.h b/mainwindow.h
index fb207112d..c670a6283 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -384,6 +384,7 @@ private:
   bool    m_tuneup;
   bool    m_bTxTime;
   bool    m_rxDone;
+  bool    m_bHaveTransmitted;    //Can be used to prohibit consecutive WSPR transmittions
 
   float   m_pctZap;
 
diff --git a/plotter.cpp b/plotter.cpp
index ff2b896d7..dcbec62b0 100644
--- a/plotter.cpp
+++ b/plotter.cpp
@@ -6,8 +6,6 @@
 
 #define MAX_SCREENSIZE 2048
 
-//float swide0[2048];
-
 CPlotter::CPlotter(QWidget *parent) :                  //CPlotter Constructor
   QFrame(parent)
 {
@@ -128,15 +126,15 @@ void CPlotter::draw(float swide[], bool bScroll)                            //dr
   }
 
   float ymin=1.e30;
+  if(swide[0]>1.e29 and swide[0]< 1.5e30) painter1.setPen(Qt::green);
+  if(swide[0]>1.4e30) painter1.setPen(Qt::yellow);
   for(int i=0; i<iz; i++) {
-    //    swide0[i]=swide[i];
     y=swide[i];
     if(y<ymin) ymin=y;
     int y1 = 10.0*gain*y + 10*m_plotZero +40;
     if (y1<0) y1=0;
     if (y1>254) y1=254;
-    if (swide[i]>1.e29) y1=255;
-    painter1.setPen(m_ColorTbl[y1]);
+    if (swide[i]<1.e29) painter1.setPen(m_ColorTbl[y1]);
     painter1.drawPoint(i,0);
   }
 
diff --git a/widegraph.cpp b/widegraph.cpp
index 0f1dfd87d..a92cffd05 100644
--- a/widegraph.cpp
+++ b/widegraph.cpp
@@ -90,8 +90,7 @@ WideGraph::WideGraph(QSettings * settings, QWidget *parent) :
   ui->paletteComboBox->addItem (user_defined);
   if (user_defined == m_waterfallPalette) ui->paletteComboBox->setCurrentIndex(index);
   readPalette ();
-
-  //  ui->paletteComboBox->lineEdit()->setAlignment(Qt::AlignHCenter);
+  m_bHaveTransmitted=false;
 }
 
 WideGraph::~WideGraph ()
@@ -163,9 +162,12 @@ void WideGraph::dataSink2(float s[], float df3, int ihsym, int ndiskdata)  //dat
     qint64 ms = QDateTime::currentMSecsSinceEpoch() % 86400000;
     int ntr = (ms/1000) % m_TRperiod;
     if((ndiskdata && ihsym <= m_waterfallAvg) || (!ndiskdata && ntr<m_ntr0)) {
+      float flagValue=1.0e30;
+      if(m_bHaveTransmitted) flagValue=2.0e30;
       for (int i=0; i<2048; i++) {
-        swide[i] = 1.e30;
+        swide[i] = flagValue;
       }
+      m_bHaveTransmitted=false;
     }
     m_ntr0=ntr;
     ui->widePlot->draw(swide,true);
@@ -426,3 +428,8 @@ int WideGraph::smoothYellow()
 {
   return m_nsmo;
 }
+
+void WideGraph::setWSPRtransmitted()
+{
+  m_bHaveTransmitted=true;
+}
diff --git a/widegraph.h b/widegraph.h
index 3b8f99ac3..db71dabb7 100644
--- a/widegraph.h
+++ b/widegraph.h
@@ -42,6 +42,7 @@ public:
   void   setTol(int n);
   int    smoothYellow();
   void   setRxBand(QString band);
+  void   setWSPRtransmitted();
 
 signals:
   void freezeDecode2(int n);
@@ -95,6 +96,7 @@ private:
 
   bool   m_lockTxFreq;
   bool   m_bFlatten;
+  bool   m_bHaveTransmitted;    //Set true at end of a WSPR transmission
 
   QString m_mode;
   QString m_modeTx;