diff --git a/src/blackgui/selcalcodeselector.cpp b/src/blackgui/selcalcodeselector.cpp
new file mode 100644
index 000000000..7f88c4d27
--- /dev/null
+++ b/src/blackgui/selcalcodeselector.cpp
@@ -0,0 +1,61 @@
+#include "selcalcodeselector.h"
+#include "ui_selcalcodeselector.h"
+#include "blackmisc/avselcal.h"
+
+namespace BlackGui
+{
+    CSelcalCodeSelector::CSelcalCodeSelector(QWidget *parent) :
+        QFrame(parent), ui(new Ui::CSelcalCodeSelector)
+    {
+        this->ui->setupUi(this);
+        this->resetSelcalCodes(false);
+
+        bool c;
+        c = connect(this->ui->cb_SelcalPairs1, SIGNAL(currentIndexChanged(int)), this, SIGNAL(valueChanged()));
+        Q_ASSERT(c);
+        c = connect(this->ui->cb_SelcalPairs2, SIGNAL(currentIndexChanged(int)), this, SIGNAL(valueChanged()));
+        Q_ASSERT(c);
+    }
+
+    CSelcalCodeSelector::~CSelcalCodeSelector()
+    {
+        delete ui;
+    }
+
+    QString CSelcalCodeSelector::getSelcalCode() const
+    {
+        QString selcal = this->ui->cb_SelcalPairs1->currentText();
+        selcal.append(this->ui->cb_SelcalPairs2->currentText());
+        return selcal;
+    }
+
+    void CSelcalCodeSelector::resetSelcalCodes(bool allowEmptyValue)
+    {
+        this->ui->cb_SelcalPairs1->clear();
+        if (allowEmptyValue) this->ui->cb_SelcalPairs1->addItem("  ");
+        this->ui->cb_SelcalPairs1->addItems(BlackMisc::Aviation::CSelcal::codePairs());
+        this->ui->cb_SelcalPairs2->clear();
+        if (allowEmptyValue) this->ui->cb_SelcalPairs2->addItem("  ");
+        this->ui->cb_SelcalPairs2->addItems(BlackMisc::Aviation::CSelcal::codePairs());
+    }
+
+    void CSelcalCodeSelector::setSelcalCode(const QString &selcal)
+    {
+        QString s = selcal.isEmpty() ? "    " : selcal.toUpper().trimmed();
+        Q_ASSERT(s.length() == 4);
+        if (s.length() != 4) return;
+        QString s1 = s.left(2);
+        QString s2 = s.right(2);
+        if (BlackMisc::Aviation::CSelcal::codePairs().contains(s1))
+            this->ui->cb_SelcalPairs1->setCurrentText(s1);
+        if (BlackMisc::Aviation::CSelcal::codePairs().contains(s2))
+            this->ui->cb_SelcalPairs1->setCurrentText(s2);
+    }
+
+    bool CSelcalCodeSelector::hasValidCode() const
+    {
+        QString s = this->getSelcalCode();
+        if (s.length() != 4) return false;
+        return BlackMisc::Aviation::CSelcal::isValidCode(s);
+    }
+}
diff --git a/src/blackgui/selcalcodeselector.h b/src/blackgui/selcalcodeselector.h
new file mode 100644
index 000000000..ee8fd9237
--- /dev/null
+++ b/src/blackgui/selcalcodeselector.h
@@ -0,0 +1,45 @@
+#ifndef BLACKGUI_SELCALCODESELECTOR_H
+#define BLACKGUI_SELCALCODESELECTOR_H
+
+#include <QFrame>
+
+namespace Ui { class CSelcalCodeSelector; }
+namespace BlackGui
+{
+
+    /*!
+     * \brief SELCAL mode selector
+     */
+    class CSelcalCodeSelector : public QFrame
+    {
+        Q_OBJECT
+
+    public:
+        //! Constructor
+        explicit CSelcalCodeSelector(QWidget *parent = nullptr);
+
+        //! Destructor
+        ~CSelcalCodeSelector();
+
+        //! SELCAL code
+        QString getSelcalCode() const;
+
+        //! Reset the SELCAL code
+        void resetSelcalCodes(bool allowEmptyValue = false);
+
+        //! Set the SELCAL code
+        void setSelcalCode(const QString &selcal);
+
+        //! Valid code?
+        bool hasValidCode() const;
+
+    signals:
+        //! Value has been changed
+        void valueChanged();
+
+    private:
+        Ui::CSelcalCodeSelector *ui;
+    };
+}
+
+#endif // guard
diff --git a/src/blackgui/selcalcodeselector.ui b/src/blackgui/selcalcodeselector.ui
new file mode 100644
index 000000000..281a5afc5
--- /dev/null
+++ b/src/blackgui/selcalcodeselector.ui
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>CSelcalCodeSelector</class>
+ <widget class="QFrame" name="CSelcalCodeSelector">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>143</width>
+    <height>22</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Frame</string>
+  </property>
+  <property name="frameShape">
+   <enum>QFrame::StyledPanel</enum>
+  </property>
+  <property name="frameShadow">
+   <enum>QFrame::Raised</enum>
+  </property>
+  <layout class="QHBoxLayout" name="hl_SelcalCodeSelector">
+   <property name="spacing">
+    <number>3</number>
+   </property>
+   <property name="leftMargin">
+    <number>0</number>
+   </property>
+   <property name="topMargin">
+    <number>0</number>
+   </property>
+   <property name="rightMargin">
+    <number>0</number>
+   </property>
+   <property name="bottomMargin">
+    <number>0</number>
+   </property>
+   <item>
+    <widget class="QComboBox" name="cb_SelcalPairs1"/>
+   </item>
+   <item>
+    <widget class="QComboBox" name="cb_SelcalPairs2"/>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>