--- r820t.c	2019-01-06 21:10:42.432677930 +0100
+++ r820t.c	2019-01-06 20:39:02.777705931 +0100
@@ -759,7 +759,11 @@
 		lna_top = 0xe5;
 		lna_vth_l = 0x62;
 		mixer_vth_l = 0x75;
-		air_cable1_in = 0x60;
+		if (freq < 231000000) {
+			air_cable1_in = 0x60;
+		} else {
+			air_cable1_in = 0x00;
+		}
 		cable2_in = 0x00;
 		pre_dect = 0x40;
 		lna_discharge = 14;