diff --git a/README.md b/README.md
index 51d7b9b..120b3ad 100644
--- a/README.md
+++ b/README.md
@@ -11,10 +11,23 @@ There is absolutely no guarantee that it will work in any way shape or form on y
 even brick your radio(s).
 
 You're on your own.
- 
+
 NO REFUNDS, ever !
 
-## Radio performance
+## Observed radio boot problems
+
+After having two UV-K5(8) radios for a while now, and I don't know how many programming lead
+insertions/deinsertions (lots n lots!) both radios are now having trouble booting up into either
+the bootloader and/or the firmware.
+
+The reason appears to be something to do with the the 3.5mm/2.5mm mic jack sockets, most likely
+the internal contacts in either/both of the sockets.
+
+Need to find a suitable replacement for the two jack sockets to confirm this though.
+
+<img src="/images/jack_sockets.png" />
+
+# Radio performance
 
 Please note that the Quansheng UV-Kx radios are not professional quality transceivers, their
 performance is strictly limited. The RX front end has no track-tuned band pass filtering
diff --git a/app/app.c b/app/app.c
index c9ad889..2eb73b1 100644
--- a/app/app.c
+++ b/app/app.c
@@ -706,7 +706,7 @@ static void APP_next_freq(void)
 
 		#ifdef ENABLE_FASTER_CHANNEL_SCAN
 			//g_scan_tick_10ms = 10;   // 100ms
-			g_scan_tick_10ms = 6;    // 60ms
+			g_scan_tick_10ms = 7;      // 70ms
 		#else
 			g_scan_tick_10ms = scan_pause_freq_10ms;
 		#endif
diff --git a/firmware.bin b/firmware.bin
index 656e104..e134024 100644
Binary files a/firmware.bin and b/firmware.bin differ
diff --git a/firmware.packed.bin b/firmware.packed.bin
index fac39ec..d5bbadd 100644
Binary files a/firmware.packed.bin and b/firmware.packed.bin differ
diff --git a/images/jack_sockets.png b/images/jack_sockets.png
new file mode 100644
index 0000000..5ebc77e
Binary files /dev/null and b/images/jack_sockets.png differ