Update thd74.c

fixes set_ts (the byte passed in thd74_set_freq_item() was wrong, it's 27 for normal mode and 35 for fine mode). Also if a step lower than 5000 is entered the radio is switched into fine mode (only works on VFO B)

rigs/kenwood/thd74.c

@@ -638,11 +638,23 @@ static int thd74_set_ts(RIG *rig, vfo_t vfo, shortfreq_t ts)
 
     rig_debug(RIG_DEBUG_TRACE, "%s: called\n", __func__);
 
+    for (tsinx = 0; tsinx < 4; tsinx++)
+    {
+        if (thd74tuningstep_fine[tsinx] >= ts)
+        {
+            thd74_set_freq_item(rig, vfo, 33, 1); // Turn fine mode on
+            thd74_set_freq_item(rig, vfo, 35, tsinx);
+            return RIG_OK;
+        }
+    }
+    
     for (tsinx = 0; tsinx < 10; tsinx++)
     {
+
         if (thd74tuningstep[tsinx] >= ts)
         {
-            thd74_set_freq_item(rig, vfo, 16, tsinx);
+            thd74_set_freq_item(rig, vfo, 33, 0); //Turn fine mode off
+            thd74_set_freq_item(rig, vfo, 27, tsinx);
             return RIG_OK;
         }
     }