diff --git a/RFM69.cpp b/RFM69.cpp
index c5ca36c..fb0a39d 100644
--- a/RFM69.cpp
+++ b/RFM69.cpp
@@ -57,7 +57,7 @@ bool RFM69::initialize(byte freqBand, byte nodeID, byte networkID)
     //* 0x39 */ { REG_NODEADRS, nodeID }, //turned off because we're not using address filtering
     /* 0x3C */ { REG_FIFOTHRESH, RF_FIFOTHRESH_TXSTART_FIFONOTEMPTY | RF_FIFOTHRESH_VALUE }, //TX on FIFO not empty
     /* 0x3d */ { REG_PACKETCONFIG2, RF_PACKET2_RXRESTARTDELAY_2BITS | RF_PACKET2_AUTORXRESTART_ON | RF_PACKET2_AES_OFF }, //RXRESTARTDELAY must match transmitter PA ramp-down time (bitrate dependent)
-    /* 0x6F */ { REG_TESTDAGC, RF_DAGC_CONTINUOUS }, // run DAGC continuously in RX mode
+    /* 0x6F */ { REG_TESTDAGC, RF_DAGC_IMPROVED_LOWBETA0 }, // run DAGC continuously in RX mode, recommended default for AfcLowBetaOn=0
     {255, 0}
   };
 
@@ -73,6 +73,10 @@ bool RFM69::initialize(byte freqBand, byte nodeID, byte networkID)
   for (byte i = 0; CONFIG[i][0] != 255; i++)
     writeReg(CONFIG[i][0], CONFIG[i][1]);
 
+  // Encryption is persistent between resets and can trip you up during debugging.
+  // Disable it during initialization so we always start from a known state.
+  encrypt(0);
+
   setHighPower(_isRFM69HW); //called regardless if it's a RFM69W or RFM69HW
   setMode(RF69_MODE_STANDBY);
 	while ((readReg(REG_IRQFLAGS1) & RF_IRQFLAGS1_MODEREADY) == 0x00); // Wait for ModeReady
diff --git a/RFM69registers.h b/RFM69registers.h
index 4928d4e..d5f0e1f 100644
--- a/RFM69registers.h
+++ b/RFM69registers.h
@@ -93,6 +93,7 @@
 #define REG_TESTPA1       0x5A //only present on RFM69HW/SX1231H
 #define REG_TESTPA2       0x5C //only present on RFM69HW/SX1231H
 #define REG_TESTDAGC      0x6F
+#define REG_TESTAFC       0x71
 
 //******************************************************
 // RF69/SX1231 bit control definition
@@ -1046,6 +1047,8 @@
 #define RF_TEMP1_ADCLOWPOWER_ON			0x01  // Default
 #define RF_TEMP1_ADCLOWPOWER_OFF		0x00
 
-// RegTestDagc 0x6F: demodulator config and IO mode config
-#define RF_DAGC_CONTINUOUS          0x20    // true = DAGC updated every two bits
+// RegTestDagc
+#define RF_DAGC_NORMAL              0x00  // Reset value
+#define RF_DAGC_IMPROVED_LOWBETA1   0x20  //
+#define RF_DAGC_IMPROVED_LOWBETA0   0x30  // Recommended default