Little updates:

* make the hello string live in progmem
* shuffle comments around a bit to clarify
* delete doubled-up copy/paste defines

ubitx4.ino

@@ -537,7 +537,7 @@ void setup()
 
   //we print this line so this shows up even if the raduino 
   //crashes later in the code
-  printLine2("uBITX v4.3b");
+  printLineF2(F("uBITX v4.3b"));
   //active_delay(500);
 
   initSettings();

ubitx4_defaults.h

@@ -32,18 +32,15 @@
 #define SECOND_OSC_USB (56995000l)
 #define SECOND_OSC_LSB (32995000l)
 
-// the second oscillator should ideally be at 57 MHz, however, the crystal filter's center frequency
-// is shifted down a little due to the loading from the impedance matching L-networks on either sides
-#define SECOND_OSC_USB (56995000l)
-#define SECOND_OSC_LSB (32995000l)
-
 //these are the two default USB and LSB frequencies. The best frequencies depend upon your individual taste and filter shape
 #define INIT_USB_FREQ   (11996500l)
+
+// Default first IF frequency (can be tuned via EEPROM)
+#define DEFAULT_FIRSTIF 45000000L
+
 // limits the tuning and working range of the ubitx between 3 MHz and 30 MHz
 #define LOWEST_FREQ   (100000l)
 #define HIGHEST_FREQ (30000000l)
 #define FAST_TUNE_STEP (200000L)
 
-#define DEFAULT_FIRSTIF 45000000L
-
 #endif	/* __UBITX4_EEPROM_DEFAULTS_H__ */

ubitx4_txfilt.ino

@@ -7,6 +7,10 @@
 
 /**
  * Select the properly tx harmonic filters
+ *
+ * This is valid for the ubitx v4 board; different boards have different TX filter
+ * configurations and thus will need a different filter mapping routine here!
+ * 
  * The four harmonic filters use only three relays
  * the four LPFs cover 30-21 Mhz, 18 - 14 Mhz, 7-10 MHz and 3.5 to 5 Mhz
  * Briefly, it works like this,