use autogain on airspyhf

config_webrx.py

@@ -150,11 +150,11 @@ sdrs = {
         "name": "Airspy HF+",
         "type": "airspyhf",
         "ppm": 0,
+        "rf_gain": "auto",
         "profiles": {
             "20m": {
                 "name": "20m",
                 "center_freq": 14150000,
-                "rf_gain": 10,
                 "samp_rate": 768000,
                 "start_freq": 14070000,
                 "start_mod": "usb",
@@ -162,7 +162,6 @@ sdrs = {
             "30m": {
                 "name": "30m",
                 "center_freq": 10125000,
-                "rf_gain": 10,
                 "samp_rate": 192000,
                 "start_freq": 10142000,
                 "start_mod": "usb",
@@ -170,7 +169,6 @@ sdrs = {
             "40m": {
                 "name": "40m",
                 "center_freq": 7100000,
-                "rf_gain": 10,
                 "samp_rate": 256000,
                 "start_freq": 7070000,
                 "start_mod": "usb",
@@ -178,7 +176,6 @@ sdrs = {
             "80m": {
                 "name": "80m",
                 "center_freq": 3650000,
-                "rf_gain": 10,
                 "samp_rate": 768000,
                 "start_freq": 3570000,
                 "start_mod": "usb",
@@ -186,7 +183,6 @@ sdrs = {
             "49m": {
                 "name": "49m Broadcast",
                 "center_freq": 6000000,
-                "rf_gain": 10,
                 "samp_rate": 768000,
                 "start_freq": 6070000,
                 "start_mod": "am",