diff --git a/src/gps.c b/src/gps.c
--- a/src/gps.c
+++ b/src/gps.c
@@ -36,13 +36,13 @@ char tramsmissionType[7];
 void gps_poweron(void)
 {
     // NOTE: pchannel
-    gpio_clear(GPS_ONOFF);
+    //gpio_clear(GPS_ONOFF);
 }
 
 void gps_poweroff(void)
 {
     // NOTE: pchannel
-    gpio_set(GPS_ONOFF);
+    //gpio_set(GPS_ONOFF);
 }
 
 char timestamp[12];	//hhmmss.ss
@@ -172,7 +172,7 @@ enum decodeState {
 
 void usart1_isr(void)
 {
-	uint8_t recv = usart_recv(GPS_USART);
+	uint8_t recv = 0;// usart_recv(GPS_USART);
 	//ECHO debug: usart_send_blocking(GPS_USART, recv);
 	nmeaBuffer[nmeaBufferDataPosition % NMEABUFFER_SIZE] = recv;
 	nmeaBufferDataPosition = (nmeaBufferDataPosition + 1) % NMEABUFFER_SIZE;
@@ -214,7 +214,7 @@ void gps_sendubx(uint8_t* dat, uint8_t s
     uint8_t sendctr;
     for(sendctr = 0; sendctr < size; sendctr++)
     {
-        usart_send(GPS_USART, dat[sendctr]);
+        //usart_send(GPS_USART, dat[sendctr]);
     }
 }
 
diff --git a/src/main.c b/src/main.c
--- a/src/main.c
+++ b/src/main.c
@@ -51,6 +51,15 @@ void encode_wspr(void)
     si5351_output_enable(SI5351_CLK0, 1);
     //si5351_pll_reset(SI5351_PLLA);
 
+    // Make sure the other outputs of the SI5351 are disabled
+    si5351_output_enable(SI5351_CLK1, 0); // Disable the clock initially
+    si5351_output_enable(SI5351_CLK2, 0); // Disable the clock initially
+
+    // disable clock powers
+    si5351_set_clock_pwr(SI5351_CLK1, 0);
+    si5351_set_clock_pwr(SI5351_CLK2, 0);
+
+
     // Encode message to transmit
     wspr_encode(call, loc, dbm, tx_buffer);
 
@@ -88,7 +97,7 @@ int main(void)
     dma_init();
     adc_init();
     i2c_init();
-    gps_init();
+//    gps_init();
 
     // Disable ICs
     HAL_GPIO_WritePin(OSC_NOTEN, 1);