diff --git a/src/dcf77.cpp b/src/dcf77.cpp
index 54856953..29182a5f 100644
--- a/src/dcf77.cpp
+++ b/src/dcf77.cpp
@@ -1,9 +1,6 @@
 /*
 // Emulate a DCF77 radio receiver
 //
-// parts of this code werde adapted from source:
-https://www.elektormagazine.com/labs/dcf77-emulator-with-esp8266-elektor-labs-version-150713
-//
 // a nice & free logic test program for DCF77 can be found here:
 https://www-user.tu-chemnitz.de/~heha/viewzip.cgi/hs/Funkuhr.zip/
 //
@@ -25,7 +22,6 @@ uint8_t DCFtimeframe[DCF77_FRAME_SIZE];
 // initialize and configure DCF77 output
 int dcf77_init(void) {
 
-  time_t t, tt;
   BitsPending = false;
 
   pinMode(HAS_DCF77, OUTPUT);
diff --git a/src/if482.cpp b/src/if482.cpp
index cfa3ec71..da582716 100644
--- a/src/if482.cpp
+++ b/src/if482.cpp
@@ -152,7 +152,6 @@ void if482_loop(void *pvParameters) {
   configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
 
   TickType_t wakeTime;
-  time_t t, tt;
   const TickType_t timeOffset =
       pdMS_TO_TICKS(IF482_OFFSET); // duration of telegram transmit
   const TickType_t startTime = xTaskGetTickCount(); // now
@@ -172,8 +171,7 @@ void if482_loop(void *pvParameters) {
         portMAX_DELAY); // wait forever (missing error handling here...)
 
 #if !defined RTC_CLK || (RTC_CLK == IF482_PULSE_DURATION) // we don't need clock rescaling
-    // now we're synced to start of second tt and wait
-    // until it's time to start transmit telegram for tt+1
+    // wait until it's time to start transmit telegram for next second
     vTaskDelayUntil(&wakeTime, shotTime); // sets waketime to moment of shot
     IF482.print(IF482_Out(now() + 1));