diff --git a/Src/config.c b/Src/config.c
index 7d48fa3..b3e608e 100644
--- a/Src/config.c
+++ b/Src/config.c
@@ -198,9 +198,9 @@ void ConfigWrite(void)
 {
 	ConfigErase();
 
-	writeString(CONFIG_CALL, GeneralConfig.call, sizeof(GeneralConfig.call));
+	writeString(CONFIG_CALL, GeneralConfig.call, 6);
 	write(CONFIG_SSID, GeneralConfig.callSsid);
-	writeString(CONFIG_DEST, GeneralConfig.dest, sizeof(GeneralConfig.dest));
+	writeString(CONFIG_DEST, GeneralConfig.dest, 6);
 	write(CONFIG_TXDELAY, Ax25Config.txDelayLength);
 	write(CONFIG_TXTAIL, Ax25Config.txTailLength);
 	write(CONFIG_TXQUIET, Ax25Config.quietTime);
diff --git a/Src/main.c b/Src/main.c
index ec9e314..c3aa514 100644
--- a/Src/main.c
+++ b/Src/main.c
@@ -227,7 +227,7 @@ int main(void)
 	//set some initial values in case there is no configuration saved in memory
 	Uart1.baudrate = 9600;
 	Uart2.baudrate = 9600;
-	ModemConfig.usePWM = 0;
+	ModemConfig.usePWM = 1; //use PWM by default
 	ModemConfig.flatAudioIn = 0;
 	Ax25Config.quietTime = 300;
 	Ax25Config.txDelayLength = 300;