diff --git a/commons.h b/commons.h
index 17fc89d..af34b99 100644
--- a/commons.h
+++ b/commons.h
@@ -29,7 +29,7 @@
 #define JS8C_TX_SECONDS     6
 #define JS8C_START_DELAY_MS 100
 
-#define JS8E_IS_ULTRA 0
+#define JS8E_IS_ULTRA 1
 #if JS8E_IS_ULTRA
 #define JS8E_SYMBOL_SAMPLES 384
 #define JS8E_TX_SECONDS     4
diff --git a/lib/js8/js8e_params.f90 b/lib/js8/js8e_params.f90
index 9136299..0687aa5 100644
--- a/lib/js8/js8e_params.f90
+++ b/lib/js8/js8e_params.f90
@@ -6,7 +6,7 @@
 !parameter (JZ=62)                     !Sync Search Space over +/- 2.5s relative to 0.5s TX start time. 2.48 = 62/4/(12000/1920) ?
 
 
-! parameter (NSPS=384,  NTXDUR=4,  NDOWNSPS=12, NDD=125, JZ=250) ! 250 Hz  31.25 baud 60 wpm -18.0dB (1.0Eb/N0)  2.52s
+  parameter (NSPS=384,  NTXDUR=4,  NDOWNSPS=12, NDD=125, JZ=250) ! 250 Hz  31.25 baud 60 wpm -18.0dB (1.0Eb/N0)  2.52s
 ! parameter (NSPS=384,  NTXDUR=5,  NDOWNSPS=12, NDD=125, JZ=116) ! 250 Hz  31.25 baud 48 wpm -18.0dB (1.0Eb/N0)  2.52s
 ! parameter (NSPS=480,  NTXDUR=5,  NDOWNSPS=12, NDD=125, JZ=116) ! 200 Hz     25 baud 48 wpm -19.0dB (1.0Eb/N0)  3.16s
 ! parameter (NSPS=480,  NTXDUR=6,  NDOWNSPS=20, NDD=150, JZ=116) ! 200 Hz     25 baud 40 wpm -19.0dB (1.0Eb/N0)  3.16s
@@ -18,7 +18,7 @@
 ! parameter (NSPS=1200, NTXDUR=10, NDOWNSPS=20, NDD=100, JZ=116) !  80 Hz     10 baud 24 wpm -23.0dB (1.0Eb/N0)  7.90s
 ! parameter (NSPS=1920, NTXDUR=15, NDOWNSPS=32, NDD=100, JZ=116) !  50 Hz  6.250 baud 16 wpm -25.0dB (1.0Eb/N0) 12.64s
 ! parameter (NSPS=3840, NTXDUR=30, NDOWNSPS=32, NDD=94,  JZ=116) !  24 Hz  3.125 baud  8 wpm -28.0dB (1.0Eb/N0) 25.28s
-  parameter (NSPS=4000, NTXDUR=30, NDOWNSPS=32, NDD=90,  JZ=32)  !  24 Hz      3 baud  8 wpm -28.2dB (1.0Eb/N0) 26.33s
+! parameter (NSPS=4000, NTXDUR=30, NDOWNSPS=32, NDD=90,  JZ=32)  !  24 Hz      3 baud  8 wpm -28.2dB (1.0Eb/N0) 26.33s
 
 parameter (AZ=12000.0/(1.0*NSPS)*0.8d0) !Dedupe overlap in Hz
 parameter (ASTART=0.5)                   !Start delay in seconds
diff --git a/mainwindow.cpp b/mainwindow.cpp
index e75c493..6a714de 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -4507,7 +4507,23 @@ void MainWindow::readFromStdout()                             //readFromStdout
       DecodedText decodedtext {QString::fromUtf8 (t.constData ()).remove (QRegularExpression {"\r|\n"}), "FT8" == m_mode &&
             ui->cbVHFcontest->isChecked(), m_config.my_grid ()};
 
-      bool bValidFrame = decodedtext.snr() > -28;
+      int snr = decodedtext.snr();
+      bool bValidFrame = snr >= -28;
+
+      // these are baseline thresholds for valid frames
+      switch(decodedtext.submode()){
+        case Varicode::JS8CallNormal:
+          bValidFrame = snr >= -24;
+        case Varicode::JS8CallFast:
+          bValidFrame = snr >= -22;
+        case Varicode::JS8CallTurbo:
+          bValidFrame = snr >= -20;
+#if JS8E_IS_ULTRA
+        case Varicode::JS8CallUltraSlow:
+          bValidFrame = snr >= -18;
+          break;
+#endif
+      }
 
       // dupe check
       auto frame = decodedtext.message();