diff --git a/radio/src/pulses/pxx.h b/radio/src/pulses/pxx.h
index 02296bbe5..31e7e16fc 100644
--- a/radio/src/pulses/pxx.h
+++ b/radio/src/pulses/pxx.h
@@ -150,6 +150,17 @@ class StandardPxxTransport: public BitTransport, public PxxCrcMixin {
       addByteWithoutCrc(byte);
     };
 
+    void addRawByteWithoutCrc(uint8_t byte)
+    {
+      for (uint8_t i = 0; i < 8; i++) {
+        if (byte & 0x80)
+          BitTransport::addPart(1);
+        else
+          BitTransport::addPart(0);
+        byte <<= 1;
+      }
+    }
+
     void addByteWithoutCrc(uint8_t byte)
     {
       for (uint8_t i = 0; i < 8; i++) {
@@ -187,6 +198,11 @@ class UartPxxTransport: public DataBuffer<uint8_t, 64>, public PxxCrcMixin {
       addWithByteStuffing(byte);
     }
 
+    void addRawByteWithoutCrc(uint8_t byte)
+    {
+      addByteWithoutCrc(byte);
+    }
+
     void addByteWithoutCrc(uint8_t byte)
     {
       *ptr++ = byte;
diff --git a/radio/src/pulses/pxx1.h b/radio/src/pulses/pxx1.h
index 444202d26..d7d958b45 100644
--- a/radio/src/pulses/pxx1.h
+++ b/radio/src/pulses/pxx1.h
@@ -33,7 +33,7 @@ class Pxx1Pulses: public PxxPulses<PxxTransport>
     void addHead()
     {
       // send 7E, do not CRC
-      PxxTransport::addByteWithoutCrc(0x7E);
+      PxxTransport::addRawByteWithoutCrc(0x7E);
     }
 
     void addCrc()