diff --git a/mainwindow.cpp b/mainwindow.cpp
index 7d3a75b..f5c0480 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -4416,11 +4416,13 @@ bool MainWindow::decodeProcessQueue(qint32 *pSubmode){
     dec_data.params.nfSplit=m_wideGraph->Fmin();
     dec_data.params.nfb=m_wideGraph->Fmax();
 
-    int filter = max(0, m_wideGraph->filter());
-    if(filter){
-        int f = currentFreqOffset() + computeBandwidthForSubmode(submode)/2;
-        dec_data.params.nfa=max(0, f - filter/2);
-        dec_data.params.nfb=min(f + filter/2, 5000);
+    if(m_wideGraph->filterEnabled()){
+        int filter = max(0, m_wideGraph->filter());
+        if(filter){
+            int f = currentFreqOffset() + computeBandwidthForSubmode(submode)/2;
+            dec_data.params.nfa=max(0, f - filter/2);
+            dec_data.params.nfb=min(f + filter/2, 5000);
+        }
     }
 
     //if(m_mode=="FT8" and m_config.bHound() and !ui->cbRxAll->isChecked()) dec_data.params.nfb=1000;
@@ -7550,7 +7552,7 @@ void MainWindow::on_actionJS8_triggered()
   updateModeButtonText();
 
   m_wideGraph->setSubMode(m_nSubMode);
-  m_wideGraph->setFilterMinimum(computeBandwidthForSubmode(m_nSubMode));
+  m_wideGraph->setFilterMinimum(computeBandwidthForSubmode(m_nSubMode) + 2*rxThreshold(m_nSubMode));
 
   bool bVHF=m_config.enable_VHF_features();
   enable_DXCC_entity (m_config.DXCC ());
diff --git a/plotter.cpp b/plotter.cpp
index 0f1b38c..ca93280 100644
--- a/plotter.cpp
+++ b/plotter.cpp
@@ -28,6 +28,7 @@ CPlotter::CPlotter(QWidget *parent) :                  //CPlotter Constructor
   m_plot2dGain {0},
   m_plot2dZero {0},
   m_nSubMode {0},
+  m_filterEnabled{false},
   m_filterWidth {0},
   m_turbo {false},
   m_Running {false},
@@ -123,7 +124,7 @@ void CPlotter::paintEvent(QPaintEvent *)                                // paint
     painter.drawPixmap(m_lastMouseX, 0, m_HoverOverlayPixmap);
   }
 
-  if(m_filterWidth > 0){
+  if(m_filterEnabled && m_filterWidth > 0){
     painter.drawPixmap(0, 0, m_FilterOverlayPixmap);
   }
 
@@ -531,7 +532,7 @@ void CPlotter::DrawOverlay()                   //DrawOverlay()
       hoverPainter.drawText(fwidth + 5, m_h, QString("%1").arg(f));
 #endif
 
-      if(m_filterWidth > 0){
+      if(m_filterEnabled && m_filterWidth > 0){
           int filterStart=XfromFreq(m_rxFreq+bw/2-m_filterWidth/2);
           int filterEnd=XfromFreq(m_rxFreq+bw/2+m_filterWidth/2);
 
@@ -551,7 +552,6 @@ void CPlotter::DrawOverlay()                   //DrawOverlay()
           filterPainter.fillRect(0, 30, filterStart, m_h, blackMask);
           filterPainter.fillRect(filterEnd+1, 30, m_Size.width(), m_h, blackMask);
       }
-
   }
 }
 
@@ -822,6 +822,12 @@ void CPlotter::setFilter(int width)
   update();
 }
 
+void CPlotter::setFilterEnabled(bool enabled){
+  m_filterEnabled=enabled;
+  DrawOverlay();
+  update();
+}
+
 void CPlotter::setFlatten(bool b1, bool b2)
 {
   m_Flatten=0;
diff --git a/plotter.h b/plotter.h
index 9d8e269..008b3bc 100644
--- a/plotter.h
+++ b/plotter.h
@@ -83,6 +83,7 @@ public:
   void setRxBand(QString band);
   void setTurbo(bool turbo);
   void setFilter(int width);
+  void setFilterEnabled(bool enabled);
 #if JS8_USE_REFSPEC
   void setReference(bool b) {m_bReference = b;}
   bool Reference() const {return m_bReference;}
@@ -152,6 +153,7 @@ private:
   QString m_rxBand;
   QString m_redFile;
 
+  bool    m_filterEnabled;
   int     m_filterWidth;
   bool    m_turbo;
   bool    m_Running;
diff --git a/widegraph.cpp b/widegraph.cpp
index 80dc633..5c5fb21 100644
--- a/widegraph.cpp
+++ b/widegraph.cpp
@@ -27,6 +27,9 @@ WideGraph::WideGraph(QSettings * settings, QWidget *parent) :
   m_palettes_path {":/Palettes"},
   m_ntr0 {0},
   m_n {0},
+  m_filterWidth {0},
+  m_filterWidthPrev {0},
+  m_filterEnabled {false},
   m_bHaveTransmitted {false}
 {
   ui->setupUi(this);
@@ -111,7 +114,7 @@ WideGraph::WideGraph(QSettings * settings, QWidget *parent) :
     ui->controls_widget->setVisible(!m_settings->value("HideControls", false).toBool());
     ui->cbControls->setChecked(!m_settings->value("HideControls", false).toBool());
 
-    setFilter(m_settings->value("FilterWidth", 0).toInt());
+    setFilter(m_settings->value("FilterWidth", 500).toInt());
     setFilterEnabled(m_settings->value("FilterEnabled", false).toBool());
   }
 
@@ -327,20 +330,25 @@ int WideGraph::Fmax()                                              //Fmax
 
 int WideGraph::filter()
 {
-    return m_filterEnabled ? m_filterWidth : 0;
+    return std::max(0, std::min(m_filterWidth, 5000));
+}
+
+bool WideGraph::filterEnabled()
+{
+    return m_filterEnabled;
 }
 
 void WideGraph::setFilter(int width){
-    if(width == m_filterWidth){
-        return;
-    }
-
     // update the filter history
     m_filterWidthPrev = m_filterWidth;
     m_filterWidth = width;
 
     // update the spinner UI
-    ui->filterSpinBox->setValue(width);
+    bool blocked = ui->filterSpinBox->blockSignals(true);
+    {
+        ui->filterSpinBox->setValue(width);
+    }
+    ui->filterSpinBox->blockSignals(blocked);
 
     // update the wide plot UI
     ui->widePlot->setFilter(width);
@@ -353,9 +361,18 @@ void WideGraph::setFilterMinimum(int width){
 void WideGraph::setFilterEnabled(bool enabled){
     m_filterEnabled = enabled;
 
-    // update the wide plot with the
-    ui->widePlot->setFilter(enabled ? m_filterWidth : 0);
+    // update the filter spinner
     ui->filterSpinBox->setEnabled(enabled);
+
+    // update the checkbox ui
+    bool blocked = ui->filterCheckBox->blockSignals(true);
+    {
+        ui->filterCheckBox->setChecked(enabled);
+    }
+    ui->filterCheckBox->blockSignals(blocked);
+
+    // update the wideplot
+    ui->widePlot->setFilterEnabled(enabled);
 }
 
 int WideGraph::fSpan()
diff --git a/widegraph.h b/widegraph.h
index 6d39449..8f40431 100644
--- a/widegraph.h
+++ b/widegraph.h
@@ -34,6 +34,7 @@ public:
   int    Fmin();
   int    Fmax();
   int    filter();
+  bool   filterEnabled();
   void   setFilter(int width);
   void   setFilterMinimum(int width);
   void   setFilterEnabled(bool enabled);