diff --git a/radio/src/targets/common/arm/stm32/adc_driver.cpp b/radio/src/targets/common/arm/stm32/adc_driver.cpp
index 6424037d1..3e8d83fdf 100644
--- a/radio/src/targets/common/arm/stm32/adc_driver.cpp
+++ b/radio/src/targets/common/arm/stm32/adc_driver.cpp
@@ -42,8 +42,6 @@
   const int8_t ana_direction[NUM_ANALOGS] = {-1,1,-1,1,  1,1};
 #elif defined(PCBXLITE)
   const int8_t ana_direction[NUM_ANALOGS] = {1,-1,-1,1,  -1,1,  1};
-#elif defined(REV4a)
-  const int8_t ana_direction[NUM_ANALOGS] = {1,-1,1,-1,  1,-1,0,  1,1,  1};
 #else
   const int8_t ana_direction[NUM_ANALOGS] = {1,-1,1,-1,  1,1,0,   1,1,  1};
 #endif
diff --git a/radio/src/targets/taranis/board.h b/radio/src/targets/taranis/board.h
index 1ef61a5c2..b91b64378 100644
--- a/radio/src/targets/taranis/board.h
+++ b/radio/src/targets/taranis/board.h
@@ -639,11 +639,7 @@ uint8_t isBacklightEnabled(void);
 #endif
 
 // I2C driver: EEPROM + Audio Volume
-#if defined(REV4a)
-  #define EEPROM_SIZE                   (64*1024)
-#else
-  #define EEPROM_SIZE                   (32*1024)
-#endif
+#define EEPROM_SIZE                   (32*1024)
 
 void i2cInit(void);
 void eepromReadBlock(uint8_t * buffer, size_t address, size_t size);
diff --git a/radio/src/targets/taranis/hal.h b/radio/src/targets/taranis/hal.h
index 0dee931ca..2b8dddd0a 100644
--- a/radio/src/targets/taranis/hal.h
+++ b/radio/src/targets/taranis/hal.h
@@ -1215,11 +1215,7 @@
   #define I2C_SCL_GPIO_PinSource        GPIO_PinSource6
   #define I2C_SDA_GPIO_PinSource        GPIO_PinSource7
 #endif
-#if defined(REV4a)
-  #define I2C_SPEED                     100000
-#else
-  #define I2C_SPEED                     400000
-#endif
+#define I2C_SPEED                       400000
 #define I2C_ADDRESS_EEPROM              0xA2
 #define I2C_ADDRESS_VOLUME              0x5C
 #define I2C_FLASH_PAGESIZE              64