diff --git a/HRDTransceiver.cpp b/HRDTransceiver.cpp
index c8a282f27..7c91adf0c 100644
--- a/HRDTransceiver.cpp
+++ b/HRDTransceiver.cpp
@@ -224,28 +224,34 @@ void HRDTransceiver::do_start ()
   HRD_info << "Buttons: {" << buttons_.join (", ") << "}\n";
 
   dropdown_names_ = send_command ("get dropdowns").trimmed ().split (',', QString::SkipEmptyParts);
+#if WSJT_TRACE_CAT
+  qDebug () << "Dropdowns:\n";
+#endif
   HRD_info << "Dropdowns:\n";
   Q_FOREACH (auto const& dd, dropdown_names_)
     {
       auto selections = send_command ("get dropdown-list {" + dd + "}").trimmed ().split (',', QString::SkipEmptyParts);
+#if WSJT_TRACE_CAT
+      qDebug () << "\t" << dd << ": {" << selections.join (", ") << "}\n";
+#endif
       HRD_info << "\t" << dd << ": {" << selections.join (", ") << "}\n";
       dropdowns_[dd] = selections;
     }
-#if WSJT_TRACE_CAT
-  qDebug () << "HRD Dropdowns: " << dropdowns_;
-#endif
 
-  sliders_ = send_command ("get sliders").trimmed ().split (',', QString::SkipEmptyParts).replaceInStrings (" ", "~");
+  slider_names_ = send_command ("get sliders").trimmed ().split (',', QString::SkipEmptyParts).replaceInStrings (" ", "~");
+#if WSJT_TRACE_CAT
+  qDebug () << "Sliders:\n";
+#endif
   HRD_info << "Sliders:\n";
-  HRD_info << "Sliders: {" << sliders_.join (", ") << "}\n";
-  Q_FOREACH (auto const& s, sliders_)
+  Q_FOREACH (auto const& s, slider_names_)
     {
       auto range = send_command ("get slider-range " + current_radio_name + " " + s).trimmed ().split (',', QString::SkipEmptyParts);
-      HRD_info << "\t" << s << ": {" << range.join (", ") << "}\n";
-    }
 #if WSJT_TRACE_CAT
-  qDebug () << "HRD Dropdowns: " << dropdowns_;
+      qDebug () << "\t" << s << ": {" << range.join (", ") << "}\n";
 #endif
+      HRD_info << "\t" << s << ": {" << range.join (", ") << "}\n";
+      sliders_[s] = range;
+    }
 
   vfo_A_button_ = find_button (QRegExp ("^(VFO~A|Main)$"));
   vfo_B_button_ = find_button (QRegExp ("^(VFO~B|Sub)$"));
diff --git a/HRDTransceiver.hpp b/HRDTransceiver.hpp
index 4afa540ee..17e546b56 100644
--- a/HRDTransceiver.hpp
+++ b/HRDTransceiver.hpp
@@ -104,10 +104,12 @@ private:
                                 // available.
 
   QMap<QString, QStringList> dropdowns_; // Dictionary of available
-                                         // drop down selections
-                                         // available.
+                                         // drop down selections.
 
-  QStringList sliders_;         // The sliders available.
+  QStringList slider_names_;    // The name of available sliders.
+
+  QMap<QString, QStringList> sliders_; // Dictionary of available
+                                // slider ranges.
 
   int vfo_A_button_;            // The button we use to select VFO
                                 // A. May be -1 if none available.