diff --git a/main.c b/main.c
index 57cba65..cb05fa3 100644
--- a/main.c
+++ b/main.c
@@ -2866,7 +2866,7 @@ int main(void)
   if (max2871) {
     ULTRA_MAX_FREQ      = 6950000000ULL + config.overclock;        // Start of harmonic mode
     MAX_LO_FREQ         = 6000000000ULL + config.overclock;
-    MAX_ABOVE_IF_FREQ   = 4500000000ULL + config.overclock;         // Range to use for below IF
+    MAX_ABOVE_IF_FREQ   = 5050000000ULL + config.overclock;         // Range to use for below IF
     MIN_BELOW_IF_FREQ   = 2310000000ULL + config.overclock;         // Range to use for below IF
 
   } else {
diff --git a/nanovna.h b/nanovna.h
index e5c6b97..5b3a5da 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -18,7 +18,7 @@
  */
 #include "ch.h"
 
-//#ifdef TINYSA_F303
+#ifdef TINYSA_F303
 #ifdef TINYSA_F072
 #error "Remove comment for #ifdef TINYSA_F303"
 #endif
@@ -26,7 +26,7 @@
 #define TINYSA4
 #endif
 #define TINYSA4_PROTO
-//#endif
+#endif
 
 #ifdef TINYSA_F072
 #ifdef TINYSA_F303