diff --git a/rigcommander.cpp b/rigcommander.cpp
index c6c67c0..de544ed 100644
--- a/rigcommander.cpp
+++ b/rigcommander.cpp
@@ -2328,6 +2328,7 @@ void rigCommander::determineRigCaps()
 
     rigCaps.hasAttenuator = true; // Verify that all recent rigs have attenuators
     rigCaps.attenuators.push_back('\x00');
+    rigCaps.preamps.push_back('\x00');
 
     rigCaps.hasTransmit = true;
 
@@ -2346,6 +2347,8 @@ void rigCommander::determineRigCaps()
             rigCaps.hasATU = true;
             rigCaps.hasCTCSS = true;
             rigCaps.attenuators.push_back('\x20');
+            rigCaps.preamps.push_back('\x01');
+            rigCaps.preamps.push_back('\x02');
             break;
         case modelR8600:
             rigCaps.modelName = QString("IC-R8600");
@@ -2363,6 +2366,8 @@ void rigCommander::determineRigCaps()
             rigCaps.attenuators.push_back('\x10');
             rigCaps.attenuators.push_back('\x20');
             rigCaps.attenuators.push_back('\x30');
+            rigCaps.preamps.push_back('\x01');
+            rigCaps.preamps.push_back('\x02');
             break;
         case model9700:
             rigCaps.modelName = QString("IC-9700");
@@ -2381,6 +2386,8 @@ void rigCommander::determineRigCaps()
             rigCaps.hasCTCSS = true;
             rigCaps.hasDTCS = true;
             rigCaps.attenuators.push_back('\x10');
+            rigCaps.preamps.push_back('\x01');
+            rigCaps.preamps.push_back('\x02');  // also 3 and 4, but these are external preamp control
             break;
         case model7610:
             rigCaps.modelName = QString("IC-7610");
@@ -2400,6 +2407,8 @@ void rigCommander::determineRigCaps()
                                        '\x15', '\x18', '\x21', '\x24',\
                                        '\x27', '\x30', '\x33', '\x36',
                                        '\x39', '\x42', '\x45'});
+            rigCaps.preamps.push_back('\x01');
+            rigCaps.preamps.push_back('\x02');
             break;
         case model7850:
             rigCaps.modelName = QString("IC-785x");
@@ -2419,6 +2428,8 @@ void rigCommander::determineRigCaps()
             rigCaps.attenuators.insert(rigCaps.attenuators.end(),
                                       {'\x03', '\x06', '\x09',
                                        '\x12', '\x15', '\x18', '\x21'});
+            rigCaps.preamps.push_back('\x01');
+            rigCaps.preamps.push_back('\x02');
             break;
         case model705:
             rigCaps.modelName = QString("IC-705");
@@ -2436,7 +2447,9 @@ void rigCommander::determineRigCaps()
             rigCaps.hasATU = true;
             rigCaps.hasCTCSS = true;
             rigCaps.hasDTCS = true;
-            rigCaps.attenuators = { '\x10' , '\x20'};
+            rigCaps.attenuators.insert(rigCaps.attenuators.end(),{ '\x10' , '\x20'});
+            rigCaps.preamps.push_back('\x01');
+            rigCaps.preamps.push_back('\x02');
             break;
         case model7100:
             rigCaps.modelName = QString("IC-7100");
@@ -2450,6 +2463,8 @@ void rigCommander::determineRigCaps()
             rigCaps.hasCTCSS = true;
             rigCaps.hasDTCS = true;
             rigCaps.attenuators.push_back('\x12');
+            rigCaps.preamps.push_back('\x01');
+            rigCaps.preamps.push_back('\x02');
             break;
         case model706:
             rigCaps.modelName = QString("IC-706");
diff --git a/rigidentities.h b/rigidentities.h
index 5aafb39..17c37ab 100644
--- a/rigidentities.h
+++ b/rigidentities.h
@@ -70,6 +70,7 @@ struct rigCapabilities {
     bool hasAttenuator;
     //QVector <unsigned char> attenuators;
     std::vector <unsigned char> attenuators;
+    std::vector <unsigned char> preamps;
 };