diff --git a/lib/jtencode/jtencode.c b/lib/jtencode/jtencode.c
--- a/lib/jtencode/jtencode.c
+++ b/lib/jtencode/jtencode.c
@@ -57,6 +57,19 @@ char locator[5];
 uint8_t power;
 
 
+static void emz_memcpy( uint8_t *pDest, uint8_t *pSrc, uint32_t len )
+{
+    uint32_t i;
+
+    // Manually copy the data
+    for ( i = 0; i < len; i++ )
+    {
+        // Copy data from source to destination
+        *pDest++ = *pSrc++;
+    }
+}
+
+
 /* Public Class Members */
 
 void* jtencode_init(void)
@@ -163,29 +176,30 @@ void jt9_encode(char * message, uint8_t 
  */
 void jt4_encode(char * message, uint8_t * symbols)
 {
+    // emz comment memmove
   // Ensure that the message text conforms to standards
-  // --------------------------------------------------
-  jt_message_prep(message);
-
-  // Bit packing
-  // -----------
-  uint8_t c[13];
-  jt9_bit_packing(message, c);
-
-  // Convolutional Encoding
-  // ---------------------
-  uint8_t s[JT4_SYMBOL_COUNT];
-  convolve(c, s, 13, JT4_BIT_COUNT);
-
-  // Interleaving
-  // ------------
-  jt9_interleave(s);
-  memmove(s + 1, s, JT4_BIT_COUNT);
-  s[0] = 0; // Append a 0 bit to start of sequence
-
-  // Merge with sync vector
-  // ----------------------
-  jt4_merge_sync_vector(s, symbols);
+//  // --------------------------------------------------
+//  jt_message_prep(message);
+//
+//  // Bit packing
+//  // -----------
+//  uint8_t c[13];
+//  jt9_bit_packing(message, c);
+//
+//  // Convolutional Encoding
+//  // ---------------------
+//  uint8_t s[JT4_SYMBOL_COUNT];
+//  convolve(c, s, 13, JT4_BIT_COUNT);
+//
+//  // Interleaving
+//  // ------------
+//  jt9_interleave(s);
+//  memmove(s + 1, s, JT4_BIT_COUNT);
+//  s[0] = 0; // Append a 0 bit to start of sequence
+//
+//  // Merge with sync vector
+//  // ----------------------
+//  jt4_merge_sync_vector(s, symbols);
 }
 
 /*
@@ -194,9 +208,9 @@ void jt4_encode(char * message, uint8_t 
  * Takes an arbitrary message of up to 13 allowable characters and returns
  *
  * call - Callsign (6 characters maximum).
- * loc - Maidenhead grid locator (4 charcters maximum).
+ * loc - Maidenhead grid locator (4 characters maximum).
  * dbm - Output power in dBm.
- * symbols - Array of channel symbols to transmit retunred by the method.
+ * symbols - Array of channel symbols to transmit returned by the method.
  *  Ensure that you pass a uint8_t array of size WSPR_SYMBOL_COUNT to the method.
  *
  */
@@ -332,8 +346,18 @@ void wspr_message_prep(char * call, char
 	// longer than 5 characters.
 	if((call[1] >= '0' && call[1] <= '9') && (call[2] < '0' || call[2] > '9'))
 	{
-		memmove(call + 1, call, 5);
+		//memmove(call + 1, call, 5);
+		//call[0] = ' ';
+
+	    call[6] = '\0';
+		call[5] = call[4];
+		call[4] = call[3];
+		call[3] = call[2];
+		call[2] = call[1];
+		call[1] = call[0];
 		call[0] = ' ';
+
+
 	}
 
 	// Now the 3rd charcter in the callsign must be a digit
@@ -355,7 +379,7 @@ void wspr_message_prep(char * call, char
 		}
 	}
 
-  memcpy(callsign, call, 6);
+	emz_memcpy(callsign, call, 6);
 
 	// Grid locator validation
 	for(i = 0; i < 4; i++)
@@ -367,7 +391,7 @@ void wspr_message_prep(char * call, char
 		}
 	}
 
-  memcpy(locator, loc, 4);
+	emz_memcpy(locator, loc, 4);
 
 	// Power level validation
 	// Only certain increments are allowed
@@ -561,7 +585,7 @@ void jt65_interleave(uint8_t * s)
     }
   }
 
-  memcpy(s, d, JT65_ENCODE_COUNT);
+  emz_memcpy(s, d, JT65_ENCODE_COUNT);
 }
 
 void jt9_interleave(uint8_t * s)
@@ -600,7 +624,7 @@ void jt9_interleave(uint8_t * s)
     d[j0[i]] = s[i];
   }
 
-  memcpy(s, d, JT9_BIT_COUNT);
+  emz_memcpy(s, d, JT9_BIT_COUNT);
 }
 
 void wspr_interleave(uint8_t * s)
@@ -637,14 +661,19 @@ void wspr_interleave(uint8_t * s)
 		}
 	}
 
-  memcpy(s, d, WSPR_BIT_COUNT);
+	emz_memcpy(s, d, WSPR_BIT_COUNT);
 }
 
 void jt9_packbits(uint8_t * d, uint8_t * a)
 {
   uint8_t i, k;
   k = 0;
-  memset(a, 0, JT9_ENCODE_COUNT);
+
+  //memset(a, 0, JT9_ENCODE_COUNT);
+  for(uint8_t iter = 0; iter<JT9_ENCODE_COUNT; iter++)
+  {
+      a[iter] = 0;
+  }
 
   for(i = 0; i < JT9_ENCODE_COUNT; i++)
   {