diff --git a/chirp/chirp_common.py b/chirp/chirp_common.py
index 65a99b05..3ec4f371 100644
--- a/chirp/chirp_common.py
+++ b/chirp/chirp_common.py
@@ -2063,3 +2063,11 @@ def mem_to_text(mem):
         elif mode == 'DTCS':
             pieces.append('D%03i' % tone)
     return '[%s]' % '/'.join(pieces)
+
+
+def in_range(freq, ranges):
+    """Check if freq is in any of the provided ranges"""
+    for lo, hi in ranges:
+        if lo <= freq <= hi:
+            return True
+    return False
diff --git a/chirp/drivers/ga510.py b/chirp/drivers/ga510.py
index e16385d8..9e10102e 100644
--- a/chirp/drivers/ga510.py
+++ b/chirp/drivers/ga510.py
@@ -35,6 +35,7 @@
 DTCS_CODES = tuple(sorted(chirp_common.DTCS_CODES + (645,)))
 
 DTMFCHARS = '0123456789ABCD*#'
+AIRBAND = (108000000, 136000000)
 
 
 def reset(radio):
@@ -1046,6 +1047,33 @@ class Senhaix8800Radio(RadioddityGA510Radio):
     _mem_format = MODEL_SHX8800_FORMAT
     _magic = b'PROGROMSHXU'
 
+    def get_features(self):
+        rf = super().get_features()
+        rf.valid_bands = rf.valid_bands + [AIRBAND]
+        rf.valid_modes = rf.valid_modes + ['AM']
+        return rf
+
+    def get_memory(self, number):
+        m = super().get_memory(number)
+        if chirp_common.in_range(m.freq, [AIRBAND]):
+            m.mode = 'AM'
+        return m
+
+    def validate_memory(self, mem):
+        msgs = []
+        if chirp_common.in_range(mem.freq, [AIRBAND]):
+            if not mem.mode == 'AM':
+                msgs.append(chirp_common.ValidationWarning(
+                    _('Frequency in this range requires AM mode')))
+            if mem.duplex or mem.tmode:
+                msgs.append(chirp_common.ValidationError(
+                    _('AM mode does not allow duplex or tone')))
+        elif not chirp_common.in_range(
+                mem.freq, [AIRBAND]) and mem.mode == 'AM':
+            msgs.append(chirp_common.ValidationWarning(
+                _('Frequency in this range must not be AM mode')))
+        return msgs + super().validate_memory(mem)
+
 
 @directory.register
 class RadioddityGS5BRadio(Senhaix8800Radio):
diff --git a/chirp/drivers/tdh8.py b/chirp/drivers/tdh8.py
index 53a6af07..2dd48677 100644
--- a/chirp/drivers/tdh8.py
+++ b/chirp/drivers/tdh8.py
@@ -811,13 +811,6 @@
 RT_730 = b"\x50\x47\x4F\x4A\x48\xC3\x44"
 
 
-def in_range(freq, ranges):
-    for lo, hi in ranges:
-        if lo <= freq <= hi:
-            return True
-    return False
-
-
 def _do_status(radio, block):
     status = chirp_common.Status()
     status.msg = "Cloning"
@@ -1259,9 +1252,9 @@ def get_memory(self, number):
                     FREQHOP_VALUES, FREQHOP_VALUES[_mem.freqhop]))
             mem.extra.append(rs)
 
-        if in_range(mem.freq, self._rxbands):
+        if chirp_common.in_range(mem.freq, self._rxbands):
             mem.duplex = 'off'
-        if in_range(mem.freq, [AIRBAND]):
+        if chirp_common.in_range(mem.freq, [AIRBAND]):
             mem.mode = 'AM'
 
         return mem
@@ -1328,7 +1321,7 @@ def set_memory(self, mem):
         else:
             _mem.txfreq = mem.freq / 10
 
-        if in_range(mem.freq, self._rxbands):
+        if chirp_common.in_range(mem.freq, self._rxbands):
             _mem.txfreq.fill_raw(b'\xFF')
 
         _mem.rxfreq = mem.freq / 10
@@ -2463,13 +2456,14 @@ def _set_fm_preset(self, settings):
 
     def validate_memory(self, mem):
         msgs = []
-        if in_range(mem.freq, [AIRBAND]) and not mem.mode == 'AM':
+        if chirp_common.in_range(mem.freq, [AIRBAND]) and not mem.mode == 'AM':
             msgs.append(chirp_common.ValidationWarning(
                 _('Frequency in this range requires AM mode')))
-        if not in_range(mem.freq, [AIRBAND]) and mem.mode == 'AM':
+        if not chirp_common.in_range(mem.freq, [AIRBAND]) and mem.mode == 'AM':
             msgs.append(chirp_common.ValidationWarning(
                 _('Frequency in this range must not be AM mode')))
-        if not in_range(mem.freq, self._txbands) and mem.duplex != 'off':
+        if (not chirp_common.in_range(mem.freq, self._txbands) and
+                mem.duplex != 'off'):
             msgs.append(chirp_common.ValidationWarning(
                 _('Frequency outside TX bands must be duplex=off')))
         return msgs + super().validate_memory(mem)