diff --git a/map65/mainwindow.cpp b/map65/mainwindow.cpp
index 451618287..769f81427 100644
--- a/map65/mainwindow.cpp
+++ b/map65/mainwindow.cpp
@@ -631,8 +631,8 @@ void MainWindow::dataSink(int k)
     n=0;
   }
 
-  if(ihsym == 280) {   //For JT65, decode at t=52 s (also for old *.tf2/*.iq disk files)
-  //if(ihsym == 302) {   //For Q65, decode at t=56 s
+//  if(ihsym == 280) {   //For JT65, decode at t=52 s (also for old *.tf2/*.iq disk files)
+  if(ihsym == 302) {   //For Q65, decode at t=56 s
     datcom_.newdat=1;
     datcom_.nagain=0;
     QDateTime t = QDateTime::currentDateTimeUtc();
@@ -1126,7 +1126,7 @@ void MainWindow::diskDat()                                   //diskDat()
 
   if(m_fs96000) hsym=2048.0*96000.0/11025.0;   //Samples per JT65 half-symbol
   if(!m_fs96000) hsym=2048.0*95238.1/11025.0;
-  for(int i=0; i<284; i++) {           // Do the half-symbol FFTs
+  for(int i=0; i<304; i++) {           // Do the half-symbol FFTs
     int k = i*hsym + 2048.5;
     dataSink(k);
     if(i%10 == 0) qApp->processEvents();       //Keep the GUI responsive