diff --git a/if-amp/if-amp-cache.lib b/if-amp/if-amp-cache.lib
new file mode 100644
index 0000000..90878e2
--- /dev/null
+++ b/if-amp/if-amp-cache.lib
@@ -0,0 +1,131 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# Connector:Conn_Coaxial
+#
+DEF Connector:Conn_Coaxial J 0 40 Y N 1 F N
+F0 "J" 10 120 50 H V C CNN
+F1 "Connector:Conn_Coaxial" 115 0 50 V V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ *BNC*
+ *SMA*
+ *SMB*
+ *SMC*
+ *Cinch*
+$ENDFPLIST
+DRAW
+A -2 0 71 1636 0 0 1 10 N -70 20 70 0
+A -1 0 71 0 -1638 0 1 10 N 70 0 -70 -20
+C 0 0 20 0 1 8 N
+P 2 0 1 0 -100 0 -20 0 N
+P 2 0 1 0 0 -100 0 -70 N
+X In 1 -200 0 100 R 50 50 1 1 P
+X Ext 2 0 -200 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device:C
+#
+DEF Device:C C 0 10 N Y 1 F N
+F0 "C" 25 100 50 H V L CNN
+F1 "Device:C" 25 -100 50 H V L CNN
+F2 "" 38 -150 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ C_*
+$ENDFPLIST
+DRAW
+P 2 0 1 20 -80 -30 80 -30 N
+P 2 0 1 20 -80 30 80 30 N
+X ~ 1 0 150 110 D 50 50 1 1 P
+X ~ 2 0 -150 110 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device:L_Core_Ferrite
+#
+DEF Device:L_Core_Ferrite L 0 40 N N 1 F N
+F0 "L" -50 0 50 V V C CNN
+F1 "Device:L_Core_Ferrite" 110 0 50 V V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Choke_*
+ *Coil*
+ Inductor_*
+ L_*
+$ENDFPLIST
+DRAW
+A 0 -75 25 -899 899 0 1 0 N 0 -100 0 -50
+A 0 -25 25 -899 899 0 1 0 N 0 -50 0 0
+A 0 25 25 -899 899 0 1 0 N 0 0 0 50
+A 0 75 25 -899 899 0 1 0 N 0 50 0 100
+P 2 0 1 0 40 -110 40 -90 N
+P 2 0 1 0 40 -70 40 -50 N
+P 2 0 1 0 40 -30 40 -10 N
+P 2 0 1 0 40 10 40 30 N
+P 2 0 1 0 40 50 40 70 N
+P 2 0 1 0 40 90 40 110 N
+P 2 0 1 0 60 -90 60 -110 N
+P 2 0 1 0 60 -50 60 -70 N
+P 2 0 1 0 60 -10 60 -30 N
+P 2 0 1 0 60 30 60 10 N
+P 2 0 1 0 60 70 60 50 N
+P 2 0 1 0 60 110 60 90 N
+X 1 1 0 150 50 D 50 50 1 1 P
+X 2 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device:Q_NPN_CBE
+#
+DEF Device:Q_NPN_CBE Q 0 0 Y N 1 F N
+F0 "Q" 200 50 50 H V L CNN
+F1 "Device:Q_NPN_CBE" 200 -50 50 H V L CNN
+F2 "" 200 100 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+C 50 0 111 0 1 10 N
+P 2 0 1 0 25 25 100 100 N
+P 3 0 1 0 25 -25 100 -100 100 -100 N
+P 3 0 1 20 25 75 25 -75 25 -75 N
+P 5 0 1 0 50 -70 70 -50 90 -90 50 -70 50 -70 F
+X C 1 100 200 100 D 50 50 1 1 P
+X B 2 -200 0 225 R 50 50 1 1 I
+X E 3 100 -200 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device:R
+#
+DEF Device:R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device:R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ R_*
+$ENDFPLIST
+DRAW
+S -40 -100 40 100 0 1 10 N
+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# power:GND
+#
+DEF power:GND #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -250 50 H I C CNN
+F1 "power:GND" 0 -150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 6 0 1 0 0 0 0 -50 50 -50 0 -100 -50 -50 0 -50 N
+X GND 1 0 0 0 D 50 50 1 1 W N
+ENDDRAW
+ENDDEF
+#
+#End Library
diff --git a/if-amp/if-amp.kicad_pcb b/if-amp/if-amp.kicad_pcb
new file mode 100644
index 0000000..02c8ecb
--- /dev/null
+++ b/if-amp/if-amp.kicad_pcb
@@ -0,0 +1 @@
+(kicad_pcb (version 4) (host kicad "dummy file") )
diff --git a/if-amp/if-amp.pro b/if-amp/if-amp.pro
new file mode 100644
index 0000000..152769c
--- /dev/null
+++ b/if-amp/if-amp.pro
@@ -0,0 +1,33 @@
+update=22/05/2015 07:44:53
+version=1
+last_client=kicad
+[general]
+version=1
+RootSch=
+BoardNm=
+[pcbnew]
+version=1
+LastNetListRead=
+UseCmpFile=1
+PadDrill=0.600000000000
+PadDrillOvalY=0.600000000000
+PadSizeH=1.500000000000
+PadSizeV=1.500000000000
+PcbTextSizeV=1.500000000000
+PcbTextSizeH=1.500000000000
+PcbTextThickness=0.300000000000
+ModuleTextSizeV=1.000000000000
+ModuleTextSizeH=1.000000000000
+ModuleTextSizeThickness=0.150000000000
+SolderMaskClearance=0.000000000000
+SolderMaskMinWidth=0.000000000000
+DrawSegmentWidth=0.200000000000
+BoardOutlineThickness=0.100000000000
+ModuleOutlineThickness=0.150000000000
+[cvpcb]
+version=1
+NetIExt=net
+[eeschema]
+version=1
+LibDir=
+[eeschema/libraries]
diff --git a/if-amp/if-amp.sch b/if-amp/if-amp.sch
new file mode 100644
index 0000000..dd620ad
--- /dev/null
+++ b/if-amp/if-amp.sch
@@ -0,0 +1,812 @@
+EESchema Schematic File Version 4
+EELAYER 26 0
+EELAYER END
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+F 0 "#PWR?" H 6100 5550 50  0001 C CNN
+F 1 "GND" H 6105 5627 50  0000 C CNN
+F 2 "" H 6100 5800 50  0001 C CNN
+F 3 "" H 6100 5800 50  0001 C CNN
+	1    6100 5800
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	7000 4700 6000 4700
+Connection ~ 7000 4700
+Wire Wire Line
+	7000 4700 7000 4600
+$Comp
+L Device:Q_NPN_CBE Q?
+U 1 1 5BB6D51D
+P 5800 4700
+F 0 "Q?" H 5990 4746 50  0000 L CNN
+F 1 "BC547" H 5990 4655 50  0000 L CNN
+F 2 "" H 6000 4800 50  0001 C CNN
+F 3 "~" H 5800 4700 50  0001 C CNN
+	1    5800 4700
+	-1   0    0    -1  
+$EndComp
+Wire Wire Line
+	5700 4500 5700 3700
+Wire Wire Line
+	5700 3700 6600 3700
+Connection ~ 6600 3700
+$Comp
+L Device:R R?
+U 1 1 5BB6FB92
+P 5700 5550
+F 0 "R?" H 5770 5596 50  0000 L CNN
+F 1 "2.2k" H 5770 5505 50  0000 L CNN
+F 2 "" V 5630 5550 50  0001 C CNN
+F 3 "~" H 5700 5550 50  0001 C CNN
+	1    5700 5550
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5700 4900 5700 5000
+Wire Wire Line
+	5050 5700 5050 5800
+$Comp
+L power:GND #PWR?
+U 1 1 5BB723DB
+P 5050 5800
+F 0 "#PWR?" H 5050 5550 50  0001 C CNN
+F 1 "GND" H 5055 5627 50  0000 C CNN
+F 2 "" H 5050 5800 50  0001 C CNN
+F 3 "" H 5050 5800 50  0001 C CNN
+	1    5050 5800
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:Q_NPN_CBE Q?
+U 1 1 5BB72525
+P 5150 5000
+F 0 "Q?" H 5340 5046 50  0000 L CNN
+F 1 "BC547" H 5340 4955 50  0000 L CNN
+F 2 "" H 5350 5100 50  0001 C CNN
+F 3 "~" H 5150 5000 50  0001 C CNN
+	1    5150 5000
+	-1   0    0    -1  
+$EndComp
+Wire Wire Line
+	5350 5000 5700 5000
+Connection ~ 5700 5000
+Wire Wire Line
+	5700 5000 5700 5400
+Wire Wire Line
+	5050 4800 5050 3700
+Wire Wire Line
+	5050 3700 5700 3700
+Connection ~ 5700 3700
+$Comp
+L Device:R R?
+U 1 1 5BB75437
+P 5050 5550
+F 0 "R?" H 5120 5596 50  0000 L CNN
+F 1 "220" H 5120 5505 50  0000 L CNN
+F 2 "" V 4980 5550 50  0001 C CNN
+F 3 "~" H 5050 5550 50  0001 C CNN
+	1    5050 5550
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5050 5200 5050 5300
+Wire Wire Line
+	5700 5700 5700 5800
+$Comp
+L power:GND #PWR?
+U 1 1 5BB784DB
+P 5700 5800
+F 0 "#PWR?" H 5700 5550 50  0001 C CNN
+F 1 "GND" H 5705 5627 50  0000 C CNN
+F 2 "" H 5700 5800 50  0001 C CNN
+F 3 "" H 5700 5800 50  0001 C CNN
+	1    5700 5800
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5050 5300 4950 5300
+Connection ~ 5050 5300
+Wire Wire Line
+	5050 5300 5050 5400
+$Comp
+L Device:C C?
+U 1 1 5BB7B7A3
+P 4800 5300
+F 0 "C?" V 4960 5300 50  0000 C CNN
+F 1 "100nF" V 5051 5300 50  0000 C CNN
+F 2 "" H 4838 5150 50  0001 C CNN
+F 3 "~" H 4800 5300 50  0001 C CNN
+	1    4800 5300
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	5050 3700 4750 3700
+$Comp
+L Device:R R?
+U 1 1 5BB7BC56
+P 4350 3700
+F 0 "R?" V 4557 3700 50  0000 C CNN
+F 1 "10k" V 4466 3700 50  0000 C CNN
+F 2 "" V 4280 3700 50  0001 C CNN
+F 3 "~" H 4350 3700 50  0001 C CNN
+	1    4350 3700
+	0    1    -1   0   
+$EndComp
+$Comp
+L Device:C C?
+U 1 1 5BB7BC5C
+P 4750 3950
+F 0 "C?" H 4864 3904 50  0000 L CNN
+F 1 "100nF" H 4864 3995 50  0000 L CNN
+F 2 "" H 4788 3800 50  0001 C CNN
+F 3 "~" H 4750 3950 50  0001 C CNN
+	1    4750 3950
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	4750 3700 4750 3800
+Connection ~ 4750 3700
+Wire Wire Line
+	4750 3700 4500 3700
+$Comp
+L power:GND #PWR?
+U 1 1 5BB7BC65
+P 4750 4200
+F 0 "#PWR?" H 4750 3950 50  0001 C CNN
+F 1 "GND" H 4755 4027 50  0000 C CNN
+F 2 "" H 4750 4200 50  0001 C CNN
+F 3 "" H 4750 4200 50  0001 C CNN
+	1    4750 4200
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4750 4200 4750 4100
+Connection ~ 5050 3700
+Wire Wire Line
+	3300 1900 3300 3700
+Wire Wire Line
+	3300 5300 4650 5300
+Wire Wire Line
+	7950 5300 8550 5300
+Wire Wire Line
+	8550 5300 8550 3700
+$Comp
+L Device:L_Core_Ferrite L?
+U 1 1 5BB85C92
+P 3300 5550
+F 0 "L?" H 3388 5596 50  0000 L CNN
+F 1 "L_Core_Ferrite" H 3388 5505 50  0000 L CNN
+F 2 "" H 3300 5550 50  0001 C CNN
+F 3 "~" H 3300 5550 50  0001 C CNN
+	1    3300 5550
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3300 5700 3300 5800
+$Comp
+L power:GND #PWR?
+U 1 1 5BB85DC8
+P 3300 5800
+F 0 "#PWR?" H 3300 5550 50  0001 C CNN
+F 1 "GND" H 3305 5627 50  0000 C CNN
+F 2 "" H 3300 5800 50  0001 C CNN
+F 3 "" H 3300 5800 50  0001 C CNN
+	1    3300 5800
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3300 5400 3300 5300
+Connection ~ 3300 5300
+Text GLabel 3300 1100 0    50   Input ~ 0
++Vcc_T
+Wire Wire Line
+	3300 1100 3400 1100
+Text GLabel 4100 3700 0    50   Input ~ 0
++Vcc_R
+Wire Wire Line
+	4100 3700 4200 3700
+$Comp
+L Connector:Conn_Coaxial J?
+U 1 1 5BB9152D
+P 2750 3700
+F 0 "J?" H 2680 3938 50  0000 C CNN
+F 1 "Conn_Coaxial" H 2680 3847 50  0000 C CNN
+F 2 "" H 2750 3700 50  0001 C CNN
+F 3 " ~" H 2750 3700 50  0001 C CNN
+	1    2750 3700
+	-1   0    0    -1  
+$EndComp
+Wire Wire Line
+	2950 3700 3300 3700
+Connection ~ 3300 3700
+Wire Wire Line
+	3300 3700 3300 5300
+Wire Wire Line
+	2750 3900 2750 4000
+$Comp
+L power:GND #PWR?
+U 1 1 5BB9648B
+P 2750 4000
+F 0 "#PWR?" H 2750 3750 50  0001 C CNN
+F 1 "GND" H 2755 3827 50  0000 C CNN
+F 2 "" H 2750 4000 50  0001 C CNN
+F 3 "" H 2750 4000 50  0001 C CNN
+	1    2750 4000
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Conn_Coaxial J?
+U 1 1 5BB98E6C
+P 9100 3700
+F 0 "J?" H 9030 3938 50  0000 C CNN
+F 1 "Conn_Coaxial" H 9030 3847 50  0000 C CNN
+F 2 "" H 9100 3700 50  0001 C CNN
+F 3 " ~" H 9100 3700 50  0001 C CNN
+	1    9100 3700
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	8900 3700 8550 3700
+Wire Wire Line
+	9100 3900 9100 4000
+$Comp
+L power:GND #PWR?
+U 1 1 5BB98E74
+P 9100 4000
+F 0 "#PWR?" H 9100 3750 50  0001 C CNN
+F 1 "GND" H 9105 3827 50  0000 C CNN
+F 2 "" H 9100 4000 50  0001 C CNN
+F 3 "" H 9100 4000 50  0001 C CNN
+	1    9100 4000
+	-1   0    0    -1  
+$EndComp
+Connection ~ 8550 3700
+Wire Wire Line
+	8550 2400 8550 3700
+$EndSCHEMATC