diff --git a/if-amp/if-amp-cache.lib b/if-amp/if-amp-cache.lib
index 90878e2..9901e3e 100644
--- a/if-amp/if-amp-cache.lib
+++ b/if-amp/if-amp-cache.lib
@@ -26,6 +26,27 @@ X Ext 2 0 -200 100 U 50 50 1 1 P
 ENDDRAW
 ENDDEF
 #
+# Connector_Generic:Conn_01x03
+#
+DEF Connector_Generic:Conn_01x03 J 0 40 Y N 1 F N
+F0 "J" 0 200 50 H V C CNN
+F1 "Connector_Generic:Conn_01x03" 0 -200 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_1x??_*
+$ENDFPLIST
+DRAW
+S -50 -95 0 -105 1 1 6 N
+S -50 5 0 -5 1 1 6 N
+S -50 105 0 95 1 1 6 N
+S -50 150 50 -150 1 1 10 f
+X Pin_1 1 -200 100 150 R 50 50 1 1 P
+X Pin_2 2 -200 0 150 R 50 50 1 1 P
+X Pin_3 3 -200 -100 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
 # Device:C
 #
 DEF Device:C C 0 10 N Y 1 F N
diff --git a/if-amp/if-amp.sch b/if-amp/if-amp.sch
index dd620ad..2049848 100644
--- a/if-amp/if-amp.sch
+++ b/if-amp/if-amp.sch
@@ -1,4 +1,5 @@
 EESchema Schematic File Version 4
+LIBS:if-amp-cache
 EELAYER 26 0
 EELAYER END
 $Descr A4 11693 8268
@@ -809,4 +810,42 @@ $EndComp
 Connection ~ 8550 3700
 Wire Wire Line
 	8550 2400 8550 3700
+$Comp
+L Connector_Generic:Conn_01x03 J?
+U 1 1 5BB5C9F8
+P 2750 6950
+F 0 "J?" H 2670 6625 50  0000 C CNN
+F 1 "Conn_01x03" H 2670 6716 50  0000 C CNN
+F 2 "" H 2750 6950 50  0001 C CNN
+F 3 "~" H 2750 6950 50  0001 C CNN
+	1    2750 6950
+	-1   0    0    1   
+$EndComp
+Text GLabel 3300 6700 1    50   Input ~ 0
++Vcc_R
+Text GLabel 3500 6700 1    50   Input ~ 0
++Vcc_T
+Wire Wire Line
+	2950 6850 3300 6850
+Wire Wire Line
+	2950 6950 3500 6950
+Wire Wire Line
+	2950 7050 3050 7050
+Wire Wire Line
+	3050 7050 3050 7150
+$Comp
+L power:GND #PWR?
+U 1 1 5BB686FD
+P 3050 7150
+F 0 "#PWR?" H 3050 6900 50  0001 C CNN
+F 1 "GND" H 3055 6977 50  0000 C CNN
+F 2 "" H 3050 7150 50  0001 C CNN
+F 3 "" H 3050 7150 50  0001 C CNN
+	1    3050 7150
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3300 6700 3300 6850
+Wire Wire Line
+	3500 6700 3500 6950
 $EndSCHEMATC
diff --git a/modulator/modulator-cache.lib b/modulator/modulator-cache.lib
new file mode 100644
index 0000000..59fdd78
--- /dev/null
+++ b/modulator/modulator-cache.lib
@@ -0,0 +1,173 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# Connector:Conn_Coaxial
+#
+DEF Connector:Conn_Coaxial J 0 40 Y N 1 F N
+F0 "J" 10 120 50 H V C CNN
+F1 "Connector:Conn_Coaxial" 115 0 50 V V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$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_*
+$ENDFPLIST
+DRAW
+P 2 0 1 20 -80 -30 80 -30 N
+P 2 0 1 20 -80 30 80 30 N
+X ~ 1 0 150 110 D 50 50 1 1 P
+X ~ 2 0 -150 110 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device:D
+#
+DEF Device:D D 0 40 N N 1 F N
+F0 "D" 0 100 50 H V C CNN
+F1 "Device:D" 0 -100 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ TO-???*
+ *_Diode_*
+ *SingleDiode*
+ D_*
+$ENDFPLIST
+DRAW
+P 2 0 1 8 -50 50 -50 -50 N
+P 2 0 1 0 50 0 -50 0 N
+P 4 0 1 8 50 50 50 -50 -50 0 50 50 N
+X K 1 -150 0 100 R 50 50 1 1 P
+X A 2 150 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device:Q_NPN_CBE
+#
+DEF Device:Q_NPN_CBE Q 0 0 Y N 1 F N
+F0 "Q" 200 50 50 H V L CNN
+F1 "Device:Q_NPN_CBE" 200 -50 50 H V L CNN
+F2 "" 200 100 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+C 50 0 111 0 1 10 N
+P 2 0 1 0 25 25 100 100 N
+P 3 0 1 0 25 -25 100 -100 100 -100 N
+P 3 0 1 20 25 75 25 -75 25 -75 N
+P 5 0 1 0 50 -70 70 -50 90 -90 50 -70 50 -70 F
+X C 1 100 200 100 D 50 50 1 1 P
+X B 2 -200 0 225 R 50 50 1 1 I
+X E 3 100 -200 100 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device:R
+#
+DEF Device:R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device:R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ R_*
+$ENDFPLIST
+DRAW
+S -40 -100 40 100 0 1 10 N
+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# misc:TrifilarTransformer
+#
+DEF misc:TrifilarTransformer T 0 40 N N 1 F N
+F0 "T" 0 450 50 H V C CNN
+F1 "misc:TrifilarTransformer" 0 550 50 H V C CNN
+F2 "" -50 0 50 H I C CNN
+F3 "" -50 0 50 H I C CNN
+$FPLIST
+ Choke_*
+ *Coil*
+ Inductor_*
+ L_*
+$ENDFPLIST
+DRAW
+A -50 -75 25 -899 899 0 1 0 N -50 -100 -50 -50
+A -50 -25 25 -899 899 0 1 0 N -50 -50 -50 0
+A -50 25 25 -899 899 0 1 0 N -50 0 -50 50
+A -50 75 25 -899 899 0 1 0 N -50 50 -50 100
+A 50 -75 25 901 -901 0 1 0 N 50 -50 50 -100
+A 50 -25 25 901 -901 0 1 0 N 50 0 50 -50
+A 50 25 25 901 -901 0 1 0 N 50 50 50 0
+A 50 75 25 901 -901 0 1 0 N 50 100 50 50
+A 150 -75 25 901 -901 0 1 0 N 150 -50 150 -100
+A 150 -25 25 901 -901 0 1 0 N 150 0 150 -50
+A 150 25 25 901 -901 0 1 0 N 150 50 150 0
+A 150 75 25 901 -901 0 1 0 N 150 100 150 50
+P 2 0 1 0 -50 -100 -50 -150 N
+P 2 0 1 0 -50 100 -50 150 N
+P 2 0 1 0 50 -100 50 -150 N
+P 2 0 1 0 150 100 150 150 N
+P 6 0 1 0 50 100 50 150 100 150 100 -150 150 -150 150 -100 N
+X H1 1 -50 200 50 D 50 50 1 1 P
+X H2 3 50 200 50 D 50 50 1 1 P N
+X L3 3 150 -200 50 U 50 50 1 1 P
+X L2 4 50 -200 50 U 50 50 1 1 P
+X H3 5 150 200 50 D 50 50 1 1 P
+X 2 L1 -50 -200 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# power:+12V
+#
+DEF power:+12V #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -150 50 H I C CNN
+F1 "power:+12V" 0 140 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 2 0 1 0 -30 50 0 100 N
+P 2 0 1 0 0 0 0 100 N
+P 2 0 1 0 0 100 30 50 N
+X +12V 1 0 0 0 U 50 50 1 1 W N
+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/modulator/modulator.kicad_pcb b/modulator/modulator.kicad_pcb
new file mode 100644
index 0000000..02c8ecb
--- /dev/null
+++ b/modulator/modulator.kicad_pcb
@@ -0,0 +1 @@
+(kicad_pcb (version 4) (host kicad "dummy file") )
diff --git a/modulator/modulator.pro b/modulator/modulator.pro
new file mode 100644
index 0000000..152769c
--- /dev/null
+++ b/modulator/modulator.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/modulator/modulator.sch b/modulator/modulator.sch
new file mode 100644
index 0000000..13b44b8
--- /dev/null
+++ b/modulator/modulator.sch
@@ -0,0 +1,313 @@
+EESchema Schematic File Version 4
+EELAYER 26 0
+EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L misc:TrifilarTransformer T?
+U 1 1 5BB541D9
+P 4800 3550
+F 0 "T?" H 4800 3950 50  0000 L CNN
+F 1 "TrifilarTransformer" H 4500 4050 50  0000 L CNN
+F 2 "" H 4750 3550 50  0001 C CNN
+F 3 "~" H 4750 3550 50  0001 C CNN
+	1    4800 3550
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR?
+U 1 1 5BB542D9
+P 4950 4600
+F 0 "#PWR?" H 4950 4350 50  0001 C CNN
+F 1 "GND" H 4955 4427 50  0000 C CNN
+F 2 "" H 4950 4600 50  0001 C CNN
+F 3 "" H 4950 4600 50  0001 C CNN
+	1    4950 4600
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:D D?
+U 1 1 5BB54315
+P 5350 3250
+F 0 "D?" H 5350 3034 50  0000 C CNN
+F 1 "D" H 5350 3125 50  0000 C CNN
+F 2 "" H 5350 3250 50  0001 C CNN
+F 3 "~" H 5350 3250 50  0001 C CNN
+	1    5350 3250
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	4850 3750 4850 3850
+Wire Wire Line
+	4850 3850 5200 3850
+Wire Wire Line
+	4950 3350 4950 3250
+Wire Wire Line
+	4950 3250 5200 3250
+$Comp
+L power:GND #PWR?
+U 1 1 5BB543D4
+P 4750 4600
+F 0 "#PWR?" H 4750 4350 50  0001 C CNN
+F 1 "GND" H 4755 4427 50  0000 C CNN
+F 2 "" H 4750 4600 50  0001 C CNN
+F 3 "" H 4750 4600 50  0001 C CNN
+	1    4750 4600
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:D D?
+U 1 1 5BB54401
+P 5350 3850
+F 0 "D?" H 5350 4066 50  0000 C CNN
+F 1 "D" H 5350 3975 50  0000 C CNN
+F 2 "" H 5350 3850 50  0001 C CNN
+F 3 "~" H 5350 3850 50  0001 C CNN
+	1    5350 3850
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:C C?
+U 1 1 5BB545A8
+P 4950 4350
+F 0 "C?" H 5065 4396 50  0000 L CNN
+F 1 "100nF" H 5065 4305 50  0000 L CNN
+F 2 "" H 4988 4200 50  0001 C CNN
+F 3 "~" H 4950 4350 50  0001 C CNN
+	1    4950 4350
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4950 4600 4950 4500
+Wire Wire Line
+	4950 3750 4950 4100
+Wire Wire Line
+	4950 4100 2150 4100
+Connection ~ 4950 4100
+Wire Wire Line
+	4950 4100 4950 4200
+Wire Wire Line
+	4750 3750 4750 4600
+Wire Wire Line
+	5500 3250 5650 3250
+Wire Wire Line
+	5650 3250 5650 3550
+Wire Wire Line
+	5650 3850 5500 3850
+Wire Wire Line
+	4750 3350 4750 3250
+Wire Wire Line
+	5650 3550 5900 3550
+Connection ~ 5650 3550
+Wire Wire Line
+	5650 3550 5650 3850
+$Comp
+L Device:Q_NPN_CBE Q?
+U 1 1 5BB54ABB
+P 3600 3000
+F 0 "Q?" H 3791 3046 50  0000 L CNN
+F 1 "Q_NPN_CBE" H 3791 2955 50  0000 L CNN
+F 2 "" H 3800 3100 50  0001 C CNN
+F 3 "~" H 3600 3000 50  0001 C CNN
+	1    3600 3000
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:R R?
+U 1 1 5BB54BEE
+P 3700 3450
+F 0 "R?" H 3770 3496 50  0000 L CNN
+F 1 "100" H 3770 3405 50  0000 L CNN
+F 2 "" V 3630 3450 50  0001 C CNN
+F 3 "~" H 3700 3450 50  0001 C CNN
+	1    3700 3450
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3700 3200 3700 3250
+Wire Wire Line
+	3700 3250 4750 3250
+Connection ~ 3700 3250
+Wire Wire Line
+	3700 3250 3700 3300
+$Comp
+L power:GND #PWR?
+U 1 1 5BB54EDF
+P 3700 3700
+F 0 "#PWR?" H 3700 3450 50  0001 C CNN
+F 1 "GND" H 3705 3527 50  0000 C CNN
+F 2 "" H 3700 3700 50  0001 C CNN
+F 3 "" H 3700 3700 50  0001 C CNN
+	1    3700 3700
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3700 3600 3700 3700
+$Comp
+L Device:C C?
+U 1 1 5BB552C8
+P 3300 2300
+F 0 "C?" H 3415 2346 50  0000 L CNN
+F 1 "100nF" H 3415 2255 50  0000 L CNN
+F 2 "" H 3338 2150 50  0001 C CNN
+F 3 "~" H 3300 2300 50  0001 C CNN
+	1    3300 2300
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3300 2150 3300 2050
+Wire Wire Line
+	3300 2050 3700 2050
+Wire Wire Line
+	3700 2050 3700 2800
+$Comp
+L Device:R R?
+U 1 1 5BB55952
+P 3300 1800
+F 0 "R?" H 3230 1754 50  0000 R CNN
+F 1 "10" H 3230 1845 50  0000 R CNN
+F 2 "" V 3230 1800 50  0001 C CNN
+F 3 "~" H 3300 1800 50  0001 C CNN
+	1    3300 1800
+	-1   0    0    1   
+$EndComp
+$Comp
+L power:GND #PWR?
+U 1 1 5BB559F7
+P 3300 2550
+F 0 "#PWR?" H 3300 2300 50  0001 C CNN
+F 1 "GND" H 3305 2377 50  0000 C CNN
+F 2 "" H 3300 2550 50  0001 C CNN
+F 3 "" H 3300 2550 50  0001 C CNN
+	1    3300 2550
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3300 2550 3300 2450
+$Comp
+L Device:R R?
+U 1 1 5BB55D0B
+P 3000 3000
+F 0 "R?" V 2793 3000 50  0000 C CNN
+F 1 "10k" V 2884 3000 50  0000 C CNN
+F 2 "" V 2930 3000 50  0001 C CNN
+F 3 "~" H 3000 3000 50  0001 C CNN
+	1    3000 3000
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	3150 3000 3400 3000
+$Comp
+L Device:C C?
+U 1 1 5BB567C9
+P 2500 3000
+F 0 "C?" V 2248 3000 50  0000 C CNN
+F 1 "100nF" V 2339 3000 50  0000 C CNN
+F 2 "" H 2538 2850 50  0001 C CNN
+F 3 "~" H 2500 3000 50  0001 C CNN
+	1    2500 3000
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	2650 3000 2850 3000
+$Comp
+L Connector:Conn_Coaxial J?
+U 1 1 5BB56D52
+P 6100 3550
+F 0 "J?" H 6199 3526 50  0000 L CNN
+F 1 "Conn_Coaxial" H 6199 3435 50  0000 L CNN
+F 2 "" H 6100 3550 50  0001 C CNN
+F 3 " ~" H 6100 3550 50  0001 C CNN
+	1    6100 3550
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Conn_Coaxial J?
+U 1 1 5BB56DD7
+P 1950 4100
+F 0 "J?" H 1880 4338 50  0000 C CNN
+F 1 "Conn_Coaxial" H 1880 4247 50  0000 C CNN
+F 2 "" H 1950 4100 50  0001 C CNN
+F 3 " ~" H 1950 4100 50  0001 C CNN
+	1    1950 4100
+	-1   0    0    -1  
+$EndComp
+$Comp
+L Connector:Conn_Coaxial J?
+U 1 1 5BB57225
+P 1950 3000
+F 0 "J?" H 1880 3238 50  0000 C CNN
+F 1 "Conn_Coaxial" H 1880 3147 50  0000 C CNN
+F 2 "" H 1950 3000 50  0001 C CNN
+F 3 " ~" H 1950 3000 50  0001 C CNN
+	1    1950 3000
+	-1   0    0    -1  
+$EndComp
+Wire Wire Line
+	2150 3000 2350 3000
+$Comp
+L power:GND #PWR?
+U 1 1 5BB57DE9
+P 1950 4600
+F 0 "#PWR?" H 1950 4350 50  0001 C CNN
+F 1 "GND" H 1955 4427 50  0000 C CNN
+F 2 "" H 1950 4600 50  0001 C CNN
+F 3 "" H 1950 4600 50  0001 C CNN
+	1    1950 4600
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GND #PWR?
+U 1 1 5BB57E32
+P 6100 3850
+F 0 "#PWR?" H 6100 3600 50  0001 C CNN
+F 1 "GND" H 6105 3677 50  0000 C CNN
+F 2 "" H 6100 3850 50  0001 C CNN
+F 3 "" H 6100 3850 50  0001 C CNN
+	1    6100 3850
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	6100 3850 6100 3750
+Wire Wire Line
+	1950 4600 1950 4300
+$Comp
+L power:GND #PWR?
+U 1 1 5BB58B71
+P 1950 3300
+F 0 "#PWR?" H 1950 3050 50  0001 C CNN
+F 1 "GND" H 1955 3127 50  0000 C CNN
+F 2 "" H 1950 3300 50  0001 C CNN
+F 3 "" H 1950 3300 50  0001 C CNN
+	1    1950 3300
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	1950 3300 1950 3200
+Wire Wire Line
+	3300 2050 3300 1950
+Connection ~ 3300 2050
+Wire Wire Line
+	3300 1650 3300 1550
+$Comp
+L power:+12V #PWR?
+U 1 1 5BB59AF6
+P 3300 1550
+F 0 "#PWR?" H 3300 1400 50  0001 C CNN
+F 1 "+12V" H 3315 1723 50  0000 C CNN
+F 2 "" H 3300 1550 50  0001 C CNN
+F 3 "" H 3300 1550 50  0001 C CNN
+	1    3300 1550
+	1    0    0    -1  
+$EndComp
+$EndSCHEMATC
diff --git a/modulator/sym-lib-table b/modulator/sym-lib-table
new file mode 100644
index 0000000..2c6bcae
--- /dev/null
+++ b/modulator/sym-lib-table
@@ -0,0 +1,3 @@
+(sym_lib_table
+  (lib (name misc)(type Legacy)(uri ${KIPRJMOD}/../lib/misc.lib)(options "")(descr ""))
+)