diff --git a/afsk/main.c b/afsk/main.c
index 8f01ada4..86bd6485 100644
--- a/afsk/main.c
+++ b/afsk/main.c
@@ -1605,9 +1605,9 @@ void get_tlm_fox() {
     }
     
     if (mode == BPSK) {  // wod field experiments
-      encodeA(b, 64 + head_offset, 0x7f);  // was 7f -> fe, ff -> 1fe  was 63
+      encodeA(b, 64 + head_offset, 0xfff);  // was 7f -> fe, ff -> 1fe  was 63
 //      encodeA(b, 63 + head_offset, 0x1e);  // 1e -> 224,65 ff -> fefe, ff -> e1, 
-      encodeA(b, 63 + head_offset, 0xff);  // 0x80 is 1000 0000 at 65
+      encodeA(b, 63 + head_offset, 0xfff);  // 0x80 is 1000 0000 at 65
       encodeB(b, 74 + head_offset, 0xfff);  // was ff	
     }
     short int data10[headerLen + rsFrames * (rsFrameLen + parityLen)];