diff --git a/Makefile b/Makefile
index 86583cfa..6971f4bf 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ ENABLE_FMRADIO                := 1
 ENABLE_NOAA                   := 0
 ENABLE_VOICE                  := 0
 ENABLE_ALARM                  := 0
-#ENABLE_1750HZ                 := 0
+ENABLE_TX1750                 := 0
 ENABLE_BIG_FREQ               := 0
 ENABLE_SMALL_BOLD             := 1
 ENABLE_KEEP_MEM_NAME          := 1
@@ -198,8 +198,8 @@ endif
 ifeq ($(ENABLE_ALARM),1)
 	CFLAGS  += -DENABLE_ALARM
 endif
-ifeq ($(ENABLE_1750HZ),1)
-	CFLAGS  += -DENABLE_1750HZ
+ifeq ($(ENABLE_TX1750),1)
+	CFLAGS  += -DENABLE_TX1750
 endif
 ifeq ($(ENABLE_KEEP_MEM_NAME),1)
 	CFLAGS  += -DKEEP_MEM_NAME
diff --git a/README.md b/README.md
index 1e678529..114ee68d 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ ENABLE_FMRADIO                := 1       WBFM VHF band 2 RX
 ENABLE_NOAA                   := 0       everything NOAA
 ENABLE_VOICE                  := 0       want to hear voices ?
 ENABLE_ALARM                  := 0       TX alarms
-#ENABLE_1750HZ                := 0       not not implemented .. side key 1750Hz TX tone
+ENABLE_1750HZ                 := 0       side key 1750Hz TX tone
 ENABLE_BIG_FREQ               := 0       big font frequencies
 ENABLE_SMALL_BOLD             := 1       bold channel name/no. (when name + freq channel display mode)
 ENABLE_KEEP_MEM_NAME          := 1       maintain channel name when (re)saving memory channel
diff --git a/app/action.c b/app/action.c
index 5acb8c56..3fa0ca5e 100644
--- a/app/action.c
+++ b/app/action.c
@@ -235,17 +235,27 @@ void ACTION_Vox(void)
 	gUpdateStatus        = true;
 }
 
-#ifdef ENABLE_ALARM
+#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 	static void ACTION_AlarmOr1750(bool b1750)
 	{
-		gInputBoxIndex        = 0;
-		gAlarmState           = b1750 ? ALARM_STATE_TX1750 : ALARM_STATE_TXALARM;
-		gAlarmRunningCounter  = 0;
-		gFlagPrepareTX        = true;
+		gInputBoxIndex = 0;
+
+		#if defined(ENABLE_ALARM) && defined(ENABLE_TX1750)
+			gAlarmState = b1750 ? ALARM_STATE_TX1750 : ALARM_STATE_TXALARM;
+			gAlarmRunningCounter = 0;
+		#elif defined(ENABLE_ALARM)
+			gAlarmState          = ALARM_STATE_TXALARM;
+			gAlarmRunningCounter = 0;
+		#else
+			gAlarmState = ALARM_STATE_TX1750;
+		#endif
+
+		gFlagPrepareTX = true;
 		gRequestDisplayScreen = DISPLAY_MAIN;
 	}
 #endif
 
+
 #ifdef ENABLE_FMRADIO
 	void ACTION_FM(void)
 	{
@@ -368,7 +378,7 @@ void ACTION_Handle(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 				break;
 		#endif
 		case ACTION_OPT_1750:
-			#ifdef ENABLE_ALARM
+			#ifdef ENABLE_TX1750
 				ACTION_AlarmOr1750(true);
 			#endif
 			break;
diff --git a/app/app.c b/app/app.c
index 20724d83..cc6b2b67 100644
--- a/app/app.c
+++ b/app/app.c
@@ -1968,7 +1968,7 @@ void APP_TimeSlice500ms(void)
 	}
 }
 
-#ifdef ENABLE_ALARM
+#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 	static void ALARM_Off(void)
 	{
 		gAlarmState = ALARM_STATE_OFF;
@@ -2186,7 +2186,7 @@ static void APP_ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 		if (gCurrentFunction == FUNCTION_TRANSMIT)
 		{	// transmitting
 
-			#ifdef ENABLE_ALARM
+			#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 				if (gAlarmState == ALARM_STATE_OFF)
 			#endif
 			{
@@ -2242,7 +2242,7 @@ static void APP_ProcessKey(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 					}
 				}
 			}
-			#ifdef ENABLE_ALARM
+			#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 				else
 				if (!bKeyHeld && bKeyPressed)
 				{
diff --git a/app/main.c b/app/main.c
index 3acd3d65..f7c9e8a6 100644
--- a/app/main.c
+++ b/app/main.c
@@ -729,7 +729,7 @@ static void MAIN_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 			{	// step/down in frequency
 				const uint32_t frequency = APP_SetFrequencyByStep(gTxVfo, Direction);
 
-				if (RX_FREQUENCY_Check(frequency) < 0)
+				if (RX_freq_check(frequency) < 0)
 				{	// frequency not allowed
 					gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
 					return;
diff --git a/firmware.bin b/firmware.bin
index 9304648a..5bfecc08 100644
Binary files a/firmware.bin and b/firmware.bin differ
diff --git a/firmware.packed.bin b/firmware.packed.bin
index 4c6b888c..5d3c9c4a 100644
Binary files a/firmware.packed.bin and b/firmware.packed.bin differ
diff --git a/frequencies.c b/frequencies.c
index 65f070ff..404a6641 100644
--- a/frequencies.c
+++ b/frequencies.c
@@ -157,7 +157,7 @@ uint32_t FREQUENCY_FloorToStep(uint32_t Upper, uint32_t Step, uint32_t Lower)
 	return Lower + (Step * Index);
 }
 /*
-int TX_FREQUENCY_Check(VFO_Info_t *pInfo)
+int TX_freq_check(VFO_Info_t *pInfo)
 {	// return '0' if TX frequency is allowed
 	// otherwise return '-1'
 	
@@ -168,7 +168,7 @@ int TX_FREQUENCY_Check(VFO_Info_t *pInfo)
 			return -1;
 	#endif
 */
-int TX_FREQUENCY_Check(const uint32_t Frequency)
+int TX_freq_check(const uint32_t Frequency)
 {	// return '0' if TX frequency is allowed
 	// otherwise return '-1'
 
@@ -235,7 +235,7 @@ int TX_FREQUENCY_Check(const uint32_t Frequency)
 	return -1;
 }
 
-int RX_FREQUENCY_Check(const uint32_t Frequency)
+int RX_freq_check(const uint32_t Frequency)
 {	// return '0' if RX frequency is allowed
 	// otherwise return '-1'
 
diff --git a/frequencies.h b/frequencies.h
index 168936fb..7202518c 100644
--- a/frequencies.h
+++ b/frequencies.h
@@ -55,9 +55,9 @@ FREQUENCY_Band_t FREQUENCY_GetBand(uint32_t Frequency);
 uint8_t          FREQUENCY_CalculateOutputPower(uint8_t TxpLow, uint8_t TxpMid, uint8_t TxpHigh, int32_t LowerLimit, int32_t Middle, int32_t UpperLimit, int32_t Frequency);
 uint32_t         FREQUENCY_FloorToStep(uint32_t Upper, uint32_t Step, uint32_t Lower);
 
-//int            TX_FREQUENCY_Check(VFO_Info_t *pInfo);
-int              TX_FREQUENCY_Check(const uint32_t Frequency);
-int              RX_FREQUENCY_Check(const uint32_t Frequency);
+//int            TX_freq_check(VFO_Info_t *pInfo);
+int              TX_freq_check(const uint32_t Frequency);
+int              RX_freq_check(const uint32_t Frequency);
 
 #endif
 
diff --git a/functions.c b/functions.c
index 5394fde4..389018d4 100644
--- a/functions.c
+++ b/functions.c
@@ -192,18 +192,27 @@ void FUNCTION_Select(FUNCTION_Type_t Function)
 	
 			DTMF_Reply();
 	
-			#ifdef ENABLE_ALARM
+			#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 				if (gAlarmState != ALARM_STATE_OFF)
 				{
-					BK4819_TransmitTone(true, (gAlarmState == ALARM_STATE_TX1750) ? 1750 : 500);
+					#ifdef ENABLE_TX1750
+						if (gAlarmState == ALARM_STATE_TX1750)
+							BK4819_TransmitTone(true, 1750);
+					#endif
+					#ifdef ENABLE_ALARM
+						if (gAlarmState == ALARM_STATE_TXALARM)
+							BK4819_TransmitTone(true, 500);
+					#endif
 					SYSTEM_DelayMs(2);
 					GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_AUDIO_PATH);
-					gAlarmToneCounter = 0;
-					gEnableSpeaker    = true;
+					#ifdef ENABLE_ALARM
+						gAlarmToneCounter = 0;
+					#endif
+					gEnableSpeaker = true;
 					break;
 				}
 			#endif
-		
+
 			if (gCurrentVfo->SCRAMBLING_TYPE > 0 && gSetting_ScrambleEnable)
 				BK4819_EnableScramble(gCurrentVfo->SCRAMBLING_TYPE - 1);
 			else
diff --git a/misc.c b/misc.c
index 9132342f..a54fcec1 100644
--- a/misc.c
+++ b/misc.c
@@ -149,7 +149,7 @@ uint8_t           gReducedService;
 uint8_t           gBatteryVoltageIndex;
 CssScanMode_t     gCssScanMode;
 bool              gUpdateRSSI;
-#ifdef ENABLE_ALARM
+#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 	AlarmState_t  gAlarmState;
 #endif
 uint8_t           gVoltageMenuCountdown;
diff --git a/radio.c b/radio.c
index 9d779d97..39624f83 100644
--- a/radio.c
+++ b/radio.c
@@ -892,8 +892,9 @@ void RADIO_SetVfoState(VfoState_t State)
 		}
 		else
 		{
-			const uint8_t Channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_CHANNEL : gEeprom.TX_CHANNEL;
-			VfoState[Channel] = State;
+			unsigned int chan = (gEeprom.DUAL_WATCH != DUAL_WATCH_OFF && gRxVfoIsActive) ? (gEeprom.RX_CHANNEL + 1) & 1 : gEeprom.RX_CHANNEL;	// 1of11
+			             chan = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.TX_CHANNEL : chan;
+			VfoState[chan]    = State;
 		}
 
 		#ifdef ENABLE_FMRADIO
@@ -928,10 +929,16 @@ void RADIO_PrepareTX(void)
 
 	RADIO_SelectCurrentVfo();
 
-	#ifdef ENABLE_ALARM
+	#if defined(ENABLE_ALARM) && defined(ENABLE_TX1750)
 		if (gAlarmState == ALARM_STATE_OFF    ||
 		    gAlarmState == ALARM_STATE_TX1750 ||
 		   (gAlarmState == ALARM_STATE_ALARM && gEeprom.ALARM_MODE == ALARM_MODE_TONE))
+	#elif defined(ENABLE_ALARM)
+		if (gAlarmState == ALARM_STATE_OFF    ||
+		   (gAlarmState == ALARM_STATE_ALARM && gEeprom.ALARM_MODE == ALARM_MODE_TONE))
+	#elif defined(ENABLE_TX1750)
+		if (gAlarmState == ALARM_STATE_OFF    ||
+		    gAlarmState == ALARM_STATE_TX1750)
 	#endif
 	{
 		#ifndef ENABLE_TX_WHEN_AM
@@ -946,8 +953,9 @@ void RADIO_PrepareTX(void)
 			State = VFO_STATE_TX_DISABLE;
 		}
 		else
-		//if (TX_FREQUENCY_Check(gCurrentVfo->pTX->Frequency) == 0 || gCurrentVfo->CHANNEL_SAVE <= FREQ_CHANNEL_LAST)
-		if (TX_FREQUENCY_Check(gCurrentVfo->pTX->Frequency) == 0)
+		//if (TX_freq_check(gCurrentVfo->pTX->Frequency) == 0 || gCurrentVfo->CHANNEL_SAVE <= FREQ_CHANNEL_LAST)
+		//if (TX_freq_check(gCurrentVfo->pTX->Frequency) == 0)
+		if (TX_freq_check(gEeprom.VfoInfo[gEeprom.TX_CHANNEL].pTX->Frequency) == 0)
 		{	// TX frequency is allowed
 			if (gCurrentVfo->BUSY_CHANNEL_LOCK && gCurrentFunction == FUNCTION_RECEIVE)
 				State = VFO_STATE_BUSY;          // busy RX'ing a station
@@ -966,7 +974,7 @@ void RADIO_PrepareTX(void)
 	if (State != VFO_STATE_NORMAL)
 	{	// TX not allowed
 		RADIO_SetVfoState(State);
-		#ifdef ENABLE_ALARM
+		#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 			gAlarmState = ALARM_STATE_OFF;
 		#endif
 		gDTMF_ReplyState = DTMF_REPLY_NONE;
@@ -994,7 +1002,8 @@ void RADIO_PrepareTX(void)
 	FUNCTION_Select(FUNCTION_TRANSMIT);
 
 	gTxTimerCountdown_500ms = 0;            // no timeout
-	#ifdef ENABLE_ALARM
+
+	#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 		if (gAlarmState == ALARM_STATE_OFF)
 	#endif
 	{
diff --git a/settings.c b/settings.c
index 649eca49..a38fa495 100644
--- a/settings.c
+++ b/settings.c
@@ -121,7 +121,7 @@ void SETTINGS_SaveSettings(void)
 		EEPROM_WriteBuffer(0x0EA0, State);
 	#endif
 
-	#ifdef ENABLE_ALARM
+	#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 		State[0] = gEeprom.ALARM_MODE;
 	#else
 		State[0] = false;
diff --git a/settings.h b/settings.h
index 3b94b8cf..47dcdb3c 100644
--- a/settings.h
+++ b/settings.h
@@ -176,7 +176,7 @@ typedef struct {
 	#endif
 
 	bool                  AUTO_KEYPAD_LOCK;
-	#ifdef ENABLE_ALARM
+	#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 		ALARM_Mode_t      ALARM_MODE;
 	#endif
 	POWER_OnDisplayMode_t POWER_ON_DISPLAY_MODE;
diff --git a/ui/main.c b/ui/main.c
index f3873f21..dd06fb8e 100644
--- a/ui/main.c
+++ b/ui/main.c
@@ -318,13 +318,14 @@ void UI_DisplayMain(void)
 
 	for (vfo_num = 0; vfo_num < 2; vfo_num++)
 	{
-		const unsigned int rx_line  = (gEeprom.RX_CHANNEL == 0) ? line0 : line1;
-//		const unsigned int tx_line  = (gEeprom.TX_CHANNEL == 0) ? line0 : line1;
-		const unsigned int line     = (vfo_num            == 0) ? line0 : line1;
-		uint8_t            channel  = gEeprom.TX_CHANNEL;
-		const bool         same_vfo = (channel == vfo_num) ? true : false;
-		uint8_t           *p_line0  = gFrameBuffer[line + 0];
-		uint8_t           *p_line1  = gFrameBuffer[line + 1];
+		const unsigned int line       = (vfo_num == 0) ? line0 : line1;
+		uint8_t            channel    = gEeprom.TX_CHANNEL;
+//		uint8_t            tx_channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_CHANNEL : gEeprom.TX_CHANNEL;
+		const bool         same_vfo   = (channel == vfo_num) ? true : false;
+		uint8_t           *p_line0    = gFrameBuffer[line + 0];
+		uint8_t           *p_line1    = gFrameBuffer[line + 1];
+		uint32_t           duff_beer  = 0;
+		uint8_t            state;
 
 		if (single_vfo)
 		{	// we're in single VFO mode - screen is dedicated to just one VFO
@@ -405,8 +406,6 @@ void UI_DisplayMain(void)
 				memmove(p_line0 + 0, BITMAP_VFO_NotDefault, sizeof(BITMAP_VFO_NotDefault));
 		}
 
-		uint32_t duff_beer = 0;
-
 		if (gCurrentFunction == FUNCTION_TRANSMIT)
 		{	// transmitting
 
@@ -428,7 +427,7 @@ void UI_DisplayMain(void)
 		{	// receiving .. show the RX symbol
 			duff_beer = 2;
 			if ((gCurrentFunction == FUNCTION_RECEIVE || gCurrentFunction == FUNCTION_MONITOR) && gEeprom.RX_CHANNEL == vfo_num)
-				UI_PrintStringSmall("RX", 14, 0, rx_line);
+				UI_PrintStringSmall("RX", 14, 0, line);
 		}
 
 		if (IS_MR_CHANNEL(gEeprom.ScreenChannel[vfo_num]))
@@ -468,7 +467,7 @@ void UI_DisplayMain(void)
 
 		// ************
 
-		uint8_t state = VfoState[vfo_num];
+		state = VfoState[vfo_num];
 
 		#ifdef ENABLE_ALARM
 			if (gCurrentFunction == FUNCTION_TRANSMIT && gAlarmState == ALARM_STATE_ALARM)
diff --git a/version.c b/version.c
index b4963337..c10615c1 100644
--- a/version.c
+++ b/version.c
@@ -4,7 +4,7 @@
 #ifdef GIT_HASH
 	#define VER     GIT_HASH
 #else
-	#define VER     "230929"
+	#define VER     "231002"
 #endif
 
 #ifndef ONE_OF_ELEVEN_VER