diff --git a/plugins/samplesource/airspy/airspygui.ui b/plugins/samplesource/airspy/airspygui.ui
index c7556464e..5087fba59 100644
--- a/plugins/samplesource/airspy/airspygui.ui
+++ b/plugins/samplesource/airspy/airspygui.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>247</width>
-    <height>242</height>
+    <width>305</width>
+    <height>304</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>BladeRF</string>
   </property>
@@ -81,6 +87,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="freqRightlSpacer">
        <property name="orientation">
diff --git a/plugins/samplesource/fcdpro/fcdprogui.ui b/plugins/samplesource/fcdpro/fcdprogui.ui
index 0bcb1f021..f1ac4da9b 100644
--- a/plugins/samplesource/fcdpro/fcdprogui.ui
+++ b/plugins/samplesource/fcdpro/fcdprogui.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>267</width>
-    <height>352</height>
+    <width>318</width>
+    <height>400</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>FunCubeDongle</string>
   </property>
@@ -78,6 +84,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_2">
        <property name="orientation">
@@ -374,17 +387,17 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/plugins/samplesource/fcdproplus/fcdproplusgui.ui b/plugins/samplesource/fcdproplus/fcdproplusgui.ui
index 60b26b347..106a101f7 100644
--- a/plugins/samplesource/fcdproplus/fcdproplusgui.ui
+++ b/plugins/samplesource/fcdproplus/fcdproplusgui.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>249</width>
-    <height>159</height>
+    <width>305</width>
+    <height>191</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>FunCubeDongle</string>
   </property>
@@ -78,6 +84,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_2">
        <property name="orientation">
@@ -281,17 +294,17 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/plugins/samplesource/filesource/filesourcegui.ui b/plugins/samplesource/filesource/filesourcegui.ui
index 29623e335..85614c792 100644
--- a/plugins/samplesource/filesource/filesourcegui.ui
+++ b/plugins/samplesource/filesource/filesourcegui.ui
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>BladeRF</string>
   </property>
@@ -84,6 +90,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="freqRightlSpacer">
        <property name="orientation">
@@ -136,11 +149,6 @@
        <property name="enabled">
         <bool>false</bool>
        </property>
-       <property name="font">
-        <font>
-         <pointsize>8</pointsize>
-        </font>
-       </property>
        <property name="text">
         <string>...</string>
        </property>
@@ -200,11 +208,6 @@
        <property name="enabled">
         <bool>false</bool>
        </property>
-       <property name="font">
-        <font>
-         <pointsize>8</pointsize>
-        </font>
-       </property>
        <property name="toolTip">
         <string>Record absolute time</string>
        </property>
@@ -305,11 +308,6 @@
        <property name="enabled">
         <bool>false</bool>
        </property>
-       <property name="font">
-        <font>
-         <pointsize>8</pointsize>
-        </font>
-       </property>
        <property name="toolTip">
         <string>Record time from start</string>
        </property>
@@ -323,17 +321,17 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
  </customwidgets>
  <resources>
   <include location="../../../sdrbase/resources/res.qrc"/>
diff --git a/plugins/samplesource/gnuradio/gnuradiogui.ui b/plugins/samplesource/gnuradio/gnuradiogui.ui
index 6eb00c2fc..9a61adb0a 100644
--- a/plugins/samplesource/gnuradio/gnuradiogui.ui
+++ b/plugins/samplesource/gnuradio/gnuradiogui.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>201</width>
-    <height>276</height>
+    <width>246</width>
+    <height>310</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>Gnuradio Source</string>
   </property>
@@ -122,6 +128,18 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="font">
+        <font>
+         <family>Sans Serif</family>
+        </font>
+       </property>
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_2">
        <property name="orientation">
diff --git a/plugins/samplesource/hackrf/hackrfgui.ui b/plugins/samplesource/hackrf/hackrfgui.ui
index 7417029ca..c96427ceb 100644
--- a/plugins/samplesource/hackrf/hackrfgui.ui
+++ b/plugins/samplesource/hackrf/hackrfgui.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>256</width>
-    <height>218</height>
+    <width>307</width>
+    <height>270</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>BladeRF</string>
   </property>
@@ -81,6 +87,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="freqRightlSpacer">
        <property name="orientation">
@@ -271,7 +284,7 @@
     </layout>
    </item>
    <item>
-    <layout class="QGridLayout" name="gridLayout_fcPos" columnstretch="0,0,0,0,0">
+    <layout class="QGridLayout" name="gridLayout_fcPos" columnstretch="0,0,0,0">
      <property name="spacing">
       <number>3</number>
      </property>
@@ -449,17 +462,17 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/plugins/samplesource/osmosdr/osmosdrgui.ui b/plugins/samplesource/osmosdr/osmosdrgui.ui
index e61894102..ab203634f 100644
--- a/plugins/samplesource/osmosdr/osmosdrgui.ui
+++ b/plugins/samplesource/osmosdr/osmosdrgui.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>253</width>
-    <height>229</height>
+    <width>259</width>
+    <height>301</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>OsmoSDR</string>
   </property>
@@ -23,7 +29,16 @@
    <property name="spacing">
     <number>3</number>
    </property>
-   <property name="margin">
+   <property name="leftMargin">
+    <number>2</number>
+   </property>
+   <property name="topMargin">
+    <number>2</number>
+   </property>
+   <property name="rightMargin">
+    <number>2</number>
+   </property>
+   <property name="bottomMargin">
     <number>2</number>
    </property>
    <item>
@@ -69,6 +84,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_2">
        <property name="orientation">
diff --git a/plugins/samplesource/osmosdr/osmosdrupgrade.ui b/plugins/samplesource/osmosdr/osmosdrupgrade.ui
index fbb293939..d179f4c8d 100644
--- a/plugins/samplesource/osmosdr/osmosdrupgrade.ui
+++ b/plugins/samplesource/osmosdr/osmosdrupgrade.ui
@@ -6,10 +6,16 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>382</width>
+    <width>398</width>
     <height>503</height>
    </rect>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>OsmoSDR Firmware Upgrade</string>
   </property>
diff --git a/plugins/samplesource/rtlsdr/rtlsdrgui.ui b/plugins/samplesource/rtlsdr/rtlsdrgui.ui
index ffa4eaa96..4fcc04ee8 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.ui
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>247</width>
-    <height>219</height>
+    <width>305</width>
+    <height>271</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>RTL-SDR</string>
   </property>
@@ -81,6 +87,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_2">
        <property name="orientation">
@@ -414,17 +427,17 @@
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
   <customwidget>
    <class>ValueDial</class>
    <extends>QWidget</extends>
    <header>gui/valuedial.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>ButtonSwitch</class>
-   <extends>QToolButton</extends>
-   <header>gui/buttonswitch.h</header>
-  </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
diff --git a/plugins/samplesource/v4l-msi/v4lgui.ui b/plugins/samplesource/v4l-msi/v4lgui.ui
index 6ecfdaa85..db94c8cc9 100644
--- a/plugins/samplesource/v4l-msi/v4lgui.ui
+++ b/plugins/samplesource/v4l-msi/v4lgui.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>132</width>
-    <height>82</height>
+    <width>212</width>
+    <height>97</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>Video4Linux</string>
   </property>
@@ -78,6 +84,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_2">
        <property name="orientation">
diff --git a/plugins/samplesource/v4l-rtl/v4lgui.ui b/plugins/samplesource/v4l-rtl/v4lgui.ui
index 9254a4a50..67e117466 100644
--- a/plugins/samplesource/v4l-rtl/v4lgui.ui
+++ b/plugins/samplesource/v4l-rtl/v4lgui.ui
@@ -16,6 +16,12 @@
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
+  <property name="font">
+   <font>
+    <family>Sans Serif</family>
+    <pointsize>9</pointsize>
+   </font>
+  </property>
   <property name="windowTitle">
    <string>Video4Linux</string>
   </property>
@@ -78,6 +84,13 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="freqUnits">
+       <property name="text">
+        <string> kHz</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_2">
        <property name="orientation">