diff -r 849ca14d4a2f -r 426defedd402 main/task_dcf.c
--- a/main/task_dcf.c	Sat Oct 21 11:44:46 2023 +0200
+++ b/main/task_dcf.c	Sat Oct 21 16:22:20 2023 +0200
@@ -19,7 +19,36 @@
 int				actualSecond = 0;		///< Current second to transmit.
 time_t				dcf_now;			///< Current time to send.
 struct tm			dcf_tm;				///< Local broken down time.
-								///
+
+
+ledc_timer_config_t		ledc_timer = {
+				    .speed_mode = LEDC_LOW_SPEED_MODE,		///< Use high speed timer
+				    .timer_num = LEDC_TIMER_0,			///< Timer 0
+				    .duty_resolution = LEDC_TIMER_10_BIT,	///< 10 bits resolution
+				    .freq_hz = 77500,				///< 77.5 KHz
+				    .clk_cfg = LEDC_AUTO_CLK			///< Auto select PWM clock
+};
+
+ledc_channel_config_t		dcf77_100tx = {					///< 100% Antenna power
+				    .channel    = LEDC_CHANNEL_0,
+				    .duty       = 0,				///< Default 0%
+				    .gpio_num   = CONFIG_ANTENNA_100_PIN,	///< Antenna pin 100%
+				    .speed_mode = LEDC_LOW_SPEED_MODE,
+				    .hpoint     = 0,
+				    .intr_type  = LEDC_INTR_DISABLE,
+				    .timer_sel  = LEDC_TIMER_0			///< Timer 0
+				};
+ledc_channel_config_t		dcf77_15tx = {					///< 15% Antenna power
+				    .channel    = LEDC_CHANNEL_1,
+				    .duty	= 0,
+				    .gpio_num   = CONFIG_ANTENNA_15_PIN,	///< Antenna pin 15%
+				    .speed_mode = LEDC_LOW_SPEED_MODE,
+				    .hpoint     = 0,
+				    .intr_type  = LEDC_INTR_DISABLE,
+				    .timer_sel  = LEDC_TIMER_0			///< Timer 0
+				};
+
+
 extern bool			System_TimeOk;
 
 
@@ -74,6 +103,11 @@
 			    time(&dcf_now);
 			    dcf_now += 60;
 			}
+			/* Carrier to 15% */
+			ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, 0);
+			ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0);
+			ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_1, 512);
+			ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_1);
 			if (impulseArray[actualSecond] == 1) {
 			    gpio_set_level(CONFIG_LED1_PIN, 1);
 			} else if (impulseArray[actualSecond] == 2) {
@@ -81,10 +115,20 @@
 			}
 			break;
 	case 1:		if (impulseArray[actualSecond] == 1) {
+			    /* Carrier back to 100% */
+			    ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, 512);
+    			    ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0);
+    			    ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_1, 0);
+    			    ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_1);
 			    gpio_set_level(CONFIG_LED1_PIN, 0);
 			}
 			break;
-	case 2:		gpio_set_level(CONFIG_LED1_PIN, 0);
+	case 2:		/* Carrier back to 100% */
+                        ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, 512);
+                        ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0);
+                        ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_1, 0);
+                        ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_1);
+			gpio_set_level(CONFIG_LED1_PIN, 0);
 			gpio_set_level(CONFIG_LED2_PIN, 0);
 			break;
 	case 9:		impulseCount = 0;
@@ -93,12 +137,14 @@
     			 * because we don't use these bits.
     			 */
     			switch (actualSecond) {
-			    case 0:	/* the first 20 bits of each minute at a logical zero value */
-				    	for (i = 0; i < 20; i++)
+			    case 0:	/*
+					 * Bit 0 is always 0.
+					 * Bits 1..14 are used to transmit weather information.
+					 * Just some fixed values here. 
+					 * Bit 15, Antenna bit. 0 = normal operation, 1 = fault
+					 */
+				    	for (i = 0; i < 16; i++)
 					    impulseArray[i] = 1;
-					for (i = 1; i < 9; i++)
-					    impulseArray[i] = 2;	/* Civil warning bits 1..14 */
-					/* Bit 15, Antenna bit. 0 = normal operation, 1 = fault */
 					break;
 			    case 1:	localtime_r(&dcf_now, &dcf_tm);
 					char strftime_buf[64];
@@ -242,7 +288,19 @@
         .callback = &DCFout,
         .name = "DCF timer"
     };
-    esp_timer_create(&timerDCF, &timerHandle);
+    ESP_ERROR_CHECK(esp_timer_create(&timerDCF, &timerHandle));
+
+    /*
+     * Prepare the LEDC PWM channels
+     */
+    ESP_ERROR_CHECK(ledc_timer_config(&ledc_timer));
+    ESP_ERROR_CHECK(ledc_channel_config(&dcf77_100tx));
+    ESP_ERROR_CHECK(ledc_channel_config(&dcf77_15tx));
+    ESP_LOGI(TAG, "DCF77 antennas at pins %d and %d", CONFIG_ANTENNA_100_PIN, CONFIG_ANTENNA_15_PIN);
+    ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0, 0);
+    ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_0);
+    ledc_set_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_1, 0);
+    ledc_update_duty(LEDC_LOW_SPEED_MODE, LEDC_CHANNEL_1);
 
     for (int i = 0; i < 59; i++)
 	impulseArray[i] = 1;