diff --git a/CMakeLists.txt b/CMakeLists.txt
index cbde4135c..24371c0ab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -462,7 +462,6 @@ set (wsjt_FSRCS
   lib/ft8/genft8.f90
   lib/genmsk_128_90.f90
   lib/genmsk40.f90
-  lib/fsk4hf/genft2.f90
   lib/ft4/genft4.f90
   lib/genqra64.f90
   lib/ft8/genft8refsig.f90
@@ -509,13 +508,9 @@ set (wsjt_FSRCS
   lib/msk144signalquality.f90
   lib/msk144sim.f90
   lib/mskrtd.f90
-  lib/fsk4hf/ft2sim.f90
-  lib/fsk4hf/ft2d.f90
   lib/ft4/ft4sim.f90
   lib/ft4/ft4d.f90
   lib/ft4/ft4_decode.f90
-  lib/ft2/cdatetime.f90
-  lib/ft2/ft2_decode.f90
   lib/77bit/my_hash.f90
   lib/wsprd/osdwspr.f90
   lib/ft8/osd174_91.f90
@@ -558,7 +553,6 @@ set (wsjt_FSRCS
   lib/sync65.f90
   lib/ft4/getcandidates4.f90
   lib/fsk4hf/getcandidates2.f90
-  lib/ft2/getcandidates2a.f90
   lib/ft4/syncft4.f90
   lib/ft8/sync8.f90
   lib/ft8/sync8d.f90
@@ -1271,12 +1265,6 @@ target_link_libraries (ft8sim wsjt_fort wsjt_cxx)
 add_executable (msk144sim lib/msk144sim.f90 wsjtx.rc)
 target_link_libraries (msk144sim wsjt_fort wsjt_cxx)
 
-add_executable (ft2sim lib/fsk4hf/ft2sim.f90 wsjtx.rc)
-target_link_libraries (ft2sim wsjt_fort wsjt_cxx)
-
-add_executable (ft2d lib/fsk4hf/ft2d.f90 wsjtx.rc)
-target_link_libraries (ft2d wsjt_fort wsjt_cxx)
-
 add_executable (ft4sim lib/ft4/ft4sim.f90 wsjtx.rc)
 target_link_libraries (ft4sim wsjt_fort wsjt_cxx)
 
diff --git a/Modulator.cpp b/Modulator.cpp
index 5f6f9a5ac..c80889a7d 100644
--- a/Modulator.cpp
+++ b/Modulator.cpp
@@ -89,13 +89,15 @@ void Modulator::start (unsigned symbolsLength, double framesPerSymbol,
   if (synchronize && !m_tuning && !m_bFastMode)	{
     m_silentFrames = m_ic + m_frameRate / (1000 / delay_ms) - (mstr * (m_frameRate / 1000));
   }
-  if(symbolsLength==144 and framesPerSymbol==160 and toneSpacing==60) {
-    //### FT2 params
+  if((symbolsLength==103 or symbolsLength==105) and framesPerSymbol==512
+     and toneSpacing==12000.0/512.0) {
+//### FT4 parameters
     delay_ms=100;
-    mstr=1947;
+    mstr=5000;
     m_ic=0;
     m_silentFrames=0;
   }
+//  qDebug() << "Mod AA" << symbolsLength << framesPerSymbol << toneSpacing;
 //  qDebug() << "Mod AB" << delay_ms << mstr << m_ic << m_silentFrames;
 
   initialize (QIODevice::ReadOnly, channel);
diff --git a/models/Modes.cpp b/models/Modes.cpp
index b823e3649..838585b2a 100644
--- a/models/Modes.cpp
+++ b/models/Modes.cpp
@@ -24,7 +24,7 @@ namespace
     "QRA64",
     "FreqCal",
     "FT8",
-    "FT2"
+    "FT4"
   };
   std::size_t constexpr mode_names_size = sizeof (mode_names) / sizeof (mode_names[0]);
 }
diff --git a/models/Modes.hpp b/models/Modes.hpp
index 6af3e5ef3..fea55e4d4 100644
--- a/models/Modes.hpp
+++ b/models/Modes.hpp
@@ -49,7 +49,7 @@ public:
     QRA64,
     FreqCal,
     FT8,
-    FT2,
+    FT4,
     MODES_END_SENTINAL_AND_COUNT // this must be last
   };
   Q_ENUM (Mode)
diff --git a/widgets/displaytext.cpp b/widgets/displaytext.cpp
index 5d68bb4f8..b67701aaa 100644
--- a/widgets/displaytext.cpp
+++ b/widgets/displaytext.cpp
@@ -455,7 +455,7 @@ void DisplayText::displayDecodedText(DecodedText const& decodedText, QString con
 void DisplayText::displayTransmittedText(QString text, QString modeTx, qint32 txFreq,bool bFastMode)
 {
     QString t1=" @  ";
-    if(modeTx=="FT2") t1=" +  ";
+    if(modeTx=="FT4") t1=" +  ";
     if(modeTx=="FT8") t1=" ~  ";
     if(modeTx=="JT4") t1=" $  ";
     if(modeTx=="JT65") t1=" #  ";
@@ -463,7 +463,7 @@ void DisplayText::displayTransmittedText(QString text, QString modeTx, qint32 tx
     QString t2;
     t2.sprintf("%4d",txFreq);
     QString t;
-    if(bFastMode or modeTx=="FT8" or modeTx=="FT2") {
+    if(bFastMode or modeTx=="FT8" or modeTx=="FT4") {
       t = QDateTime::currentDateTimeUtc().toString("hhmmss") + \
         "  Tx      " + t2 + t1 + text;
     } else if(modeTx.mid(0,6)=="FT8fox") {
diff --git a/widgets/mainwindow.cpp b/widgets/mainwindow.cpp
index 13cc34e1e..0cd19b553 100644
--- a/widgets/mainwindow.cpp
+++ b/widgets/mainwindow.cpp
@@ -99,7 +99,7 @@ extern "C" {
   void genft8_(char* msg, int* i3, int* n3, char* msgsent, char ft8msgbits[],
                int itone[], fortran_charlen_t, fortran_charlen_t);
 
-  void genft2_(char* msg, int* ichk, char* msgsent, int itone[], int* itype,
+  void genft4_(char* msg, int* ichk, char* msgsent, int itone[], int* itype,
                fortran_charlen_t, fortran_charlen_t);
 
   void gen4_(char* msg, int* ichk, char* msgsent, int itone[],
@@ -163,7 +163,7 @@ extern "C" {
 
   void chkcall_(char* w, char* basc_call, bool cok, int len1, int len2);
 
-  void ft2_decode_(char* cdatetime, int* nfqso, short int id[], int* ndecodes,
+  void ft4_decode_(char* cdatetime, int* nfqso, short int id[], int* ndecodes,
                    char* mycall6, char* hiscall6, int* nrx, char* line,
                    int len1, int len2, int len3, int len4);
 }
@@ -551,7 +551,7 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
   on_EraseButton_clicked ();
 
   QActionGroup* modeGroup = new QActionGroup(this);
-  ui->actionFT2->setActionGroup(modeGroup);
+  ui->actionFT4->setActionGroup(modeGroup);
   ui->actionFT8->setActionGroup(modeGroup);
   ui->actionJT9->setActionGroup(modeGroup);
   ui->actionJT65->setActionGroup(modeGroup);
@@ -728,11 +728,11 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
   m_guiTimer.start(100);   //### Don't change the 100 ms! ###
 
 
-  FT2_TxTimer.setSingleShot(true);
-  connect(&FT2_TxTimer, &QTimer::timeout, this, &MainWindow::stopTx);
+  FT4_TxTimer.setSingleShot(true);
+  connect(&FT4_TxTimer, &QTimer::timeout, this, &MainWindow::stopTx);
 
-  FT2_WriteTxTimer.setSingleShot(true);
-  connect(&FT2_WriteTxTimer, &QTimer::timeout, this, &MainWindow::FT2_writeTx);
+  FT4_WriteTxTimer.setSingleShot(true);
+  connect(&FT4_WriteTxTimer, &QTimer::timeout, this, &MainWindow::FT4_writeTx);
 
   ptt0Timer.setSingleShot(true);
   connect(&ptt0Timer, &QTimer::timeout, this, &MainWindow::stopTx2);
@@ -889,7 +889,7 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
   if(m_bFast9) m_bFastMode=true;
   ui->cbFast9->setChecked(m_bFast9 or m_bFastMode);
 
-  if(m_mode=="FT2") on_actionFT2_triggered();
+  if(m_mode=="FT4") on_actionFT4_triggered();
   if(m_mode=="FT8") on_actionFT8_triggered();
   if(m_mode=="JT4") on_actionJT4_triggered();
   if(m_mode=="JT9") on_actionJT9_triggered();
@@ -1361,8 +1361,8 @@ void MainWindow::dataSink(qint64 frames)
   if(m_monitoring || m_diskData) {
     m_wideGraph->dataSink2(s,m_df3,m_ihsym,m_diskData);
   }
-  if(m_mode=="FT2") ft2Data(k);
-  if(m_mode=="MSK144" or m_mode=="FT2") return;
+  if(m_mode=="FT4") ft4Data(k);
+  if(m_mode=="MSK144" or m_mode=="FT4") return;
 
   fixStop();
   if (m_mode == "FreqCal"
@@ -1893,8 +1893,8 @@ void MainWindow::keyPressEvent (QKeyEvent * e)
       break;
     case Qt::Key_F1:
       if(bAltF1F5) {
-        if(m_mode=="FT2") {
-          ft2_tx(6);
+        if(m_mode=="FT4") {
+          ft4_tx(6);
           return;
         }
         auto_tx_mode(true);
@@ -1906,8 +1906,8 @@ void MainWindow::keyPressEvent (QKeyEvent * e)
       }
     case Qt::Key_F2:
       if(bAltF1F5) {
-        if(m_mode=="FT2") {
-          ft2_tx(2);
+        if(m_mode=="FT4") {
+          ft4_tx(2);
           return;
         }
         auto_tx_mode(true);
@@ -1919,8 +1919,8 @@ void MainWindow::keyPressEvent (QKeyEvent * e)
       }
     case Qt::Key_F3:
       if(bAltF1F5) {
-        if(m_mode=="FT2") {
-          ft2_tx(3);
+        if(m_mode=="FT4") {
+          ft4_tx(3);
           return;
         }
         auto_tx_mode(true);
@@ -1932,8 +1932,8 @@ void MainWindow::keyPressEvent (QKeyEvent * e)
       }
     case Qt::Key_F4:
       if(bAltF1F5) {
-        if(m_mode=="FT2") {
-          ft2_tx(4);
+        if(m_mode=="FT4") {
+          ft4_tx(4);
           return;
         }
         auto_tx_mode(true);
@@ -1946,8 +1946,8 @@ void MainWindow::keyPressEvent (QKeyEvent * e)
       }
     case Qt::Key_F5:
       if(bAltF1F5) {
-        if(m_mode=="FT2") {
-          ft2_tx(5);
+        if(m_mode=="FT4") {
+          ft4_tx(5);
           return;
         }
         auto_tx_mode(true);
@@ -3401,7 +3401,7 @@ void MainWindow::guiUpdate()
 
   double tx1=0.0;
   double tx2=txDuration;
-  if(m_mode=="FT8" or m_mode=="FT2") icw[0]=0;              //No CW ID in FT2 or FT8 mode
+  if(m_mode=="FT8" or m_mode=="FT4") icw[0]=0;              //No CW ID in FT4 or FT8 mode
   if((icw[0]>0) and (!m_bFast9)) tx2 += icw[0]*2560.0/48000.0;  //Full length including CW ID
   if(tx2>m_TRperiod) tx2=m_TRperiod;
 
@@ -3559,7 +3559,7 @@ void MainWindow::guiUpdate()
       Q_EMIT m_config.transceiver_ptt (true);            //Assert the PTT
       m_tx_when_ready = true;
     }
-    if(!m_bTxTime and !m_tune and m_mode!="FT2") m_btxok=false;       //Time to stop transmitting
+    if(!m_bTxTime and !m_tune and m_mode!="FT4") m_btxok=false;       //Time to stop transmitting
   }
 
   if(m_mode.startsWith ("WSPR") and
@@ -3701,10 +3701,10 @@ void MainWindow::guiUpdate()
       }
     }
 
-    if(m_mode!="FT2") m_currentMessage = QString::fromLatin1(msgsent);
+    if(m_mode!="FT4") m_currentMessage = QString::fromLatin1(msgsent);
     m_bCallingCQ = CALLING == m_QSOProgress
       || m_currentMessage.contains (QRegularExpression {"^(CQ|QRZ) "});
-    if(m_mode=="FT8" or m_mode=="FT2") {
+    if(m_mode=="FT8" or m_mode=="FT4") {
       if(m_bCallingCQ && ui->cbFirst->isVisible () && ui->cbFirst->isChecked ()) {
         ui->cbFirst->setStyleSheet("QCheckBox{color:red}");
       } else {
@@ -3819,7 +3819,7 @@ void MainWindow::guiUpdate()
       m_msgSent0 = current_message;
     }
 
-    if(m_mode!="FT2") {
+    if(m_mode!="FT4") {
       if(!m_tune) write_all("Tx",m_currentMessage);
 
       if (m_config.TX_messages () && !m_tune && SpecOp::FOX!=m_config.special_op_id()) {
@@ -3856,7 +3856,7 @@ void MainWindow::guiUpdate()
     }
   }
 
-  if(m_mode=="FT8" or m_mode=="MSK144" or m_mode=="FT2") {
+  if(m_mode=="FT8" or m_mode=="MSK144" or m_mode=="FT4") {
     if(ui->txrb1->isEnabled() and 
        (SpecOp::NA_VHF==m_config.special_op_id() or 
         SpecOp::FIELD_DAY==m_config.special_op_id() or 
@@ -3888,12 +3888,12 @@ void MainWindow::guiUpdate()
       if(tHound >= 120 and m_ntx==1) auto_tx_mode(false);
     }
 
-    progressBar.setVisible(!(m_mode=="FT2"));
+    progressBar.setVisible(!(m_mode=="FT4"));
     if(m_auto and m_mode=="Echo" and m_bEchoTxOK) {
       progressBar.setMaximum(6);
       progressBar.setValue(int(m_s6));
     }
-    if(m_mode!="Echo" and m_mode!="FT2") {
+    if(m_mode!="Echo" and m_mode!="FT4") {
       if(m_monitoring or m_transmitting) {
         progressBar.setMaximum(m_TRperiod);
         int isec=int(fmod(tsec,m_TRperiod));
@@ -3932,7 +3932,7 @@ void MainWindow::guiUpdate()
           if(SpecOp::FOX==m_config.special_op_id() and ui->tabWidget->currentIndex()==2 and foxcom_.nslots==1) {
               t=m_fm1.trimmed();
           }
-          if(m_mode=="FT2") t="Tx: "+ m_currentMessage;
+          if(m_mode=="FT4") t="Tx: "+ m_currentMessage;
           tx_status_label.setText(t.trimmed());
         }
       }
@@ -4303,7 +4303,7 @@ void MainWindow::processMessage (DecodedText const& message, Qt::KeyboardModifie
       || ("JT9" == m_mode && mode != "@")
       || ("MSK144" == m_mode && !("&" == mode || "^" == mode))
       || ("QRA64" == m_mode && mode.left (1) != ":")) {
-    return;      //Currently we do auto-sequencing only in FT2, FT8, and MSK144
+    return;      //Currently we do auto-sequencing only in FT4, FT8, and MSK144
   }
 
   //Skip the rest if no decoded text extracted
@@ -4392,7 +4392,7 @@ void MainWindow::processMessage (DecodedText const& message, Qt::KeyboardModifie
         ui->TxFreqSpinBox->setValue(frequency);
       }
       if(m_mode != "JT4" && m_mode != "JT65" && !m_mode.startsWith ("JT9") &&
-         m_mode != "QRA64" && m_mode!="FT8" && m_mode!="FT2") {
+         m_mode != "QRA64" && m_mode!="FT8" && m_mode!="FT4") {
         return;
       }
     }
@@ -4534,7 +4534,7 @@ void MainWindow::processMessage (DecodedText const& message, Qt::KeyboardModifie
           m_QSOProgress = SIGNOFF;
         } else if((m_QSOProgress >= REPORT
                    || (m_QSOProgress >= REPLYING &&
-                   (m_mode=="MSK144" or m_mode=="FT8" or m_mode=="FT2")))
+                   (m_mode=="MSK144" or m_mode=="FT8" or m_mode=="FT4")))
                    && r.mid(0,1)=="R") {
           m_ntx=4;
           m_QSOProgress = ROGERS;
@@ -4759,13 +4759,13 @@ void MainWindow::processMessage (DecodedText const& message, Qt::KeyboardModifie
 
   if(m_transmitting) m_restart=true;
   if (ui->cbAutoSeq->isVisible () && ui->cbAutoSeq->isChecked ()
-      && !m_bDoubleClicked && m_mode!="FT2") {
+      && !m_bDoubleClicked && m_mode!="FT4") {
     return;
   }
-  if(m_mode=="FT2" and ui->cbAutoSeq->isChecked()) {
+  if(m_mode=="FT4" and ui->cbAutoSeq->isChecked()) {
     if(m_ntx==4 or m_ntx==5) logQSOTimer.start(0);  // Log the QSO
     if((m_ntx==3 and ui->cbFirst->isChecked()) or m_ntx==4 or m_bDoubleClicked) {
-      ft2_tx(m_ntx);
+      ft4_tx(m_ntx);
     }
   }
   if(m_config.quick_call()) auto_tx_mode(true);
@@ -4908,7 +4908,7 @@ void MainWindow::genStdMsgs(QString rpt, bool unconditional)
     int n=rpt.toInt();
     rpt.sprintf("%+2.2d",n);
 
-    if(m_mode=="MSK144" or m_mode=="FT8" or m_mode=="FT2") {
+    if(m_mode=="MSK144" or m_mode=="FT8" or m_mode=="FT4") {
       QString t2,t3;
       QString sent=rpt;
       QString rs,rst;
@@ -4962,7 +4962,7 @@ void MainWindow::genStdMsgs(QString rpt, bool unconditional)
       }
     }
 
-    if((m_mode!="MSK144" and m_mode!="FT8" and m_mode!="FT2")) {
+    if((m_mode!="MSK144" and m_mode!="FT8" and m_mode!="FT4")) {
       t=t00 + rpt;
       msgtype(t, ui->tx2);
       t=t0 + "R" + rpt;
@@ -5541,23 +5541,23 @@ void MainWindow::displayWidgets(qint64 n)
   genStdMsgs (m_rpt, true);
 }
 
-void MainWindow::on_actionFT2_triggered()
+void MainWindow::on_actionFT4_triggered()
 {
-  m_mode="FT2";
-  m_modeTx="FT2";
+  m_mode="FT4";
+  m_modeTx="FT4";
   m_TRperiod=2147483647;
   bool bVHF=m_config.enable_VHF_features();
   m_bFast9=false;
   m_bFastMode=false;
   WSPR_config(false);
-  switch_mode (Modes::FT2);
-  m_nsps=6912;
+  switch_mode (Modes::FT4);
+  m_nsps=6912;                         //???
   m_FFTSize = m_nsps/2;
   Q_EMIT FFTSize (m_FFTSize);
-  m_hsymStop=50;
+  m_hsymStop=50;                       //???
   setup_status_bar (bVHF);
-  m_toneSpacing=0.8*75.0;                   //???
-  ui->actionFT2->setChecked(true);     //???
+  m_toneSpacing=12000.0/512.0;
+  ui->actionFT4->setChecked(true);     //???
   m_wideGraph->setMode(m_mode);
   m_wideGraph->setModeTx(m_modeTx);
   VHF_features_enabled(bVHF);
@@ -6859,11 +6859,11 @@ void MainWindow::transmit (double snr)
            true, false, snr, m_TRperiod);
   }
 
-  if (m_modeTx == "FT2") {
-    toneSpacing=0.8*12000.0/160.0;
+  if (m_modeTx == "FT4") {
+    toneSpacing=12000.0/512.0;
 //    if(SpecOp::FOX==m_config.special_op_id() and !m_tune) toneSpacing=-1;
-    Q_EMIT sendMessage (NUM_FT2_SYMBOLS,
-           160.0, ui->TxFreqSpinBox->value() - m_XIT,
+    Q_EMIT sendMessage (NUM_FT4_SYMBOLS,
+           512.0, ui->TxFreqSpinBox->value() - m_XIT,
            toneSpacing, m_soundOutput, m_config.audio_output_channel (),
            true, false, snr, 2);
   }
@@ -7920,7 +7920,7 @@ void MainWindow::on_cbFirst_toggled(bool b)
 void MainWindow::on_cbAutoSeq_toggled(bool b)
 {
   if(!b) ui->cbFirst->setChecked(false);
-  ui->cbFirst->setVisible((m_mode=="FT8" or m_mode=="FT2") and b);
+  ui->cbFirst->setVisible((m_mode=="FT8" or m_mode=="FT4") and b);
 }
 
 void MainWindow::on_measure_check_box_stateChanged (int state)
@@ -8582,7 +8582,7 @@ void MainWindow::write_all(QString txRx, QString message)
   t.sprintf("%5d",ui->TxFreqSpinBox->value());
   if(txRx=="Tx") msg="   0  0.0" + t + " " + message;
   auto time = QDateTime::currentDateTimeUtc ();
-  if(m_mode!="FT2") time = time.addSecs(-(time.time().second() % m_TRperiod));
+  if(m_mode!="FT4") time = time.addSecs(-(time.time().second() % m_TRperiod));
   t.sprintf("%10.3f ",m_freqNominal/1.e6);
   if(m_diskData) {
     line=m_fileDateTime + t + txRx + " " + m_mode.leftJustified(6,' ') + msg;
@@ -8605,19 +8605,19 @@ void MainWindow::write_all(QString txRx, QString message)
   }
 }
 
-void MainWindow::ft2Data(int k)
+void MainWindow::ft4Data(int k)
 {
   static int nhsec0=-1;
-  short id[30000];
+  short id[60000];
 
   int nhsec=k/6000;
   if(nhsec==nhsec0) return;
 
-//Process FT2 data at 0.5 s intervals
+//Process FT4 data at 0.5 s intervals
   int j=k/6000;
-  j=6000*j-30000;
+  j=6000*j-60000;
   if(j<0) j+=NRING;
-  for(int i=0; i<30000; i++) {
+  for(int i=0; i<60000; i++) {
     id[i]=dec_data.d2[j];
     j++;
     if(j>=NRING) j=j-NRING;
@@ -8639,7 +8639,7 @@ void MainWindow::ft2Data(int k)
   int nfqso=1500;
   int ndecodes=0;
   int nrx=-1;
-  ft2_decode_(cdatetime,&nfqso,id,&ndecodes,mycall6,hiscall6,&nrx,&line[0],
+  ft4_decode_(cdatetime,&nfqso,id,&ndecodes,mycall6,hiscall6,&nrx,&line[0],
       17,6,6,61);
   line[60]=0;
   if(ndecodes>0) {
@@ -8676,7 +8676,7 @@ void MainWindow::ft2Data(int k)
   nhsec0=nhsec;
 }
 
-void MainWindow::ft2_tx(int ntx)
+void MainWindow::ft4_tx(int ntx)
 {
   if(g_iptt!=0) return;             //Alreadt transmitting?
   static char message[38];
@@ -8695,7 +8695,7 @@ void MainWindow::ft2_tx(int ntx)
   ba2msg(ba,message);
   int ichk=0;
   int itype=-1;
-  genft2_(message, &ichk, msgsent, const_cast<int *>(itone), &itype, 37, 37);
+  genft4_(message, &ichk, msgsent, const_cast<int *>(itone), &itype, 37, 37);
   msgsent[37]=0;
   m_currentMessage = QString::fromLatin1(msgsent).trimmed();
   tx_status_label.setStyleSheet("QLabel{background-color: #ffff33}");
@@ -8715,11 +8715,11 @@ void MainWindow::ft2_tx(int ntx)
   m_tx_when_ready = true;
   qint64 ms=QDateTime::currentMSecsSinceEpoch();
   m_modulator->set_ms0(ms);
-  FT2_TxTimer.start(2500);      //Slightly more than FT2 transmission length
+  FT4_TxTimer.start(5000);      //Slightly more than FT4 transmission length
 
   if (g_iptt == 1 && m_iptt0 == 0) {
     auto const& current_message = QString::fromLatin1 (msgsent);
-    FT2_WriteTxTimer.start(100);  //Why is a delay necessary to ensure Tx after Rx in all.txt?
+    FT4_WriteTxTimer.start(100);  //Why is a delay necessary to ensure Tx after Rx in all.txt?
     if (m_config.TX_messages () && !m_tune && SpecOp::FOX!=m_config.special_op_id()) {
       ui->decodedTextBrowser2->displayTransmittedText(current_message, m_modeTx,
            ui->TxFreqSpinBox->value(),m_bFastMode);
@@ -8743,7 +8743,7 @@ void MainWindow::ft2_tx(int ntx)
   if(!m_btxok && m_btxok0 && g_iptt==1) stopTx();
 }
 
-void MainWindow::FT2_writeTx()
+void MainWindow::FT4_writeTx()
 {
   write_all("Tx",m_currentMessage);
 }
diff --git a/widgets/mainwindow.h b/widgets/mainwindow.h
index e21a8f8db..5a1e5037c 100644
--- a/widgets/mainwindow.h
+++ b/widgets/mainwindow.h
@@ -46,7 +46,7 @@
 #define NUM_MSK144_SYMBOLS 144             //s8 + d48 + s8 + d80
 #define NUM_QRA64_SYMBOLS 84               //63 data + 21 sync
 #define NUM_FT8_SYMBOLS 79
-#define NUM_FT2_SYMBOLS 144
+#define NUM_FT4_SYMBOLS 103
 #define NUM_CW_SYMBOLS 250
 #define TX_SAMPLE_RATE 48000
 #define N_WIDGETS 33
@@ -202,7 +202,7 @@ private slots:
   void on_actionJT65_triggered();
   void on_actionJT9_JT65_triggered();
   void on_actionJT4_triggered();
-  void on_actionFT2_triggered();
+  void on_actionFT4_triggered();
   void on_actionFT8_triggered();
   void on_TxFreqSpinBox_valueChanged(int arg1);
   void on_actionSave_decoded_triggered();
@@ -312,8 +312,8 @@ private slots:
   void on_comboBoxHoundSort_activated (int index);
   void not_GA_warning_message ();
   void checkMSK144ContestType();
-  void ft2Data(int k);
-  void ft2_tx(int ntx);
+  void ft4Data(int k);
+  void ft4_tx(int ntx);
   int  setTxMsg(int n);
   bool stdCall(QString const& w);
 
@@ -581,8 +581,8 @@ private:
   QTimer minuteTimer;
   QTimer splashTimer;
   QTimer p1Timer;
-  QTimer FT2_TxTimer;
-  QTimer FT2_WriteTxTimer;
+  QTimer FT4_TxTimer;
+  QTimer FT4_WriteTxTimer;
 
   QString m_path;
   QString m_baseCall;
@@ -750,7 +750,7 @@ private:
   void foxTxSequencer();
   void foxGenWaveform(int i,QString fm);
   void writeFoxQSO (QString const& msg);
-  void FT2_writeTx();
+  void FT4_writeTx();
 };
 
 extern int killbyname(const char* progName);
diff --git a/widgets/mainwindow.ui b/widgets/mainwindow.ui
index ca9551ec2..cab236b62 100644
--- a/widgets/mainwindow.ui
+++ b/widgets/mainwindow.ui
@@ -2705,7 +2705,7 @@ list. The list can be maintained in Settings (F2).</string>
     <property name="title">
      <string>Mode</string>
     </property>
-    <addaction name="actionFT2"/>
+    <addaction name="actionFT4"/>
     <addaction name="actionFT8"/>
     <addaction name="actionJT4"/>
     <addaction name="actionJT9"/>
@@ -3339,12 +3339,12 @@ list. The list can be maintained in Settings (F2).</string>
     <string>Erase WSPR hashtable</string>
    </property>
   </action>
-  <action name="actionFT2">
+  <action name="actionFT4">
    <property name="checkable">
     <bool>true</bool>
    </property>
    <property name="text">
-    <string>FT2</string>
+    <string>FT4</string>
    </property>
   </action>
  </widget>