From 38ed1628b733cc2a9134918ec2af923281d10cec Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Fri, 21 Feb 2020 10:06:19 +0100
Subject: Filter and control changes

---
 kicad/baseband.sch | 1647 ++++++++++++++++++++++++++++------------------------
 1 file changed, 901 insertions(+), 746 deletions(-)

(limited to 'kicad/baseband.sch')

diff --git a/kicad/baseband.sch b/kicad/baseband.sch
index 17d84e0..ddf41f8 100644
--- a/kicad/baseband.sch
+++ b/kicad/baseband.sch
@@ -3,225 +3,61 @@ EELAYER 30 0
 EELAYER END
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-F 3 "" H 1600 3400 50  0001 C CNN
-	1    1600 3400
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-F 3 "" H 4100 2950 50  0001 C CNN
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 L Device:C_Small C?
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-F 2 "" H 2400 3950 50  0001 C CNN
-F 3 "~" H 2400 3950 50  0001 C CNN
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 L Device:C_Small C?
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-F 2 "" H 3950 3950 50  0001 C CNN
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 L Device:C_Small C?
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-F 2 "" H 2750 3950 50  0001 C CNN
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 L Device:C_Small C?
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-F 2 "" H 3550 3950 50  0001 C CNN
-F 3 "~" H 3550 3950 50  0001 C CNN
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-F 2 "" H 3150 3950 50  0001 C CNN
-F 3 "~" H 3150 3950 50  0001 C CNN
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-F 0 "Y?" H 2550 3875 50  0000 C CNN
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-F 4 "ECS-49-20-18-TR" H 2550 3650 50  0001 C CNN "MPN"
-	1    2550 3650
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 L Device:Crystal_Small Y?
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-P 2950 3650
-F 0 "Y?" H 2950 3875 50  0000 C CNN
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-F 4 "ECS-49-20-18-TR" H 2950 3650 50  0001 C CNN "MPN"
-	1    2950 3650
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 L Device:Crystal_Small Y?
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-P 3350 3650
-F 0 "Y?" H 3350 3875 50  0000 C CNN
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-F 4 "ECS-49-20-18-TR" H 3350 3650 50  0001 C CNN "MPN"
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 L Device:Crystal_Small Y?
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-P 3750 3650
-F 0 "Y?" H 3750 3875 50  0000 C CNN
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-F 2 "" H 3750 3650 50  0001 C CNN
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-F 4 "ECS-49-20-18-TR" H 3750 3650 50  0001 C CNN "MPN"
-	1    3750 3650
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 L Device:C_Small C?
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 F 1 "82k" H 5120 3705 50  0000 L CNN
-F 2 "" V 4980 3750 50  0001 C CNN
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 F 3 "~" H 5050 3750 50  0001 C CNN
 	1    5050 3750
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 	1    5350 4050
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-F 2 "" V 5430 4050 50  0001 C CNN
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 F 3 "~" H 5500 4050 50  0001 C CNN
 	1    5500 4050
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 F 1 "47nF" H 5708 3845 50  0000 R CNN
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 	1    5800 3800
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 L power:GNDA #PWR?
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-F 2 "" H 3150 4050 50  0001 C CNN
-F 3 "" H 3150 4050 50  0001 C CNN
-	1    3150 4050
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 L mpb:L_tapped L?
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 	1    6400 3850
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 F 3 "~" H 6250 4200 50  0001 C CNN
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-F 2 "" V 4280 4300 50  0001 C CNN
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 L Device:C_Small C?
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 	1    4900 4600
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+F 2 "Capacitor_SMD:C_0805_2012Metric" H 10050 1100 50  0001 C CNN
 F 3 "~" H 10050 1100 50  0001 C CNN
 	1    10050 1100
 	-1   0    0    1   
@@ -2439,11 +1941,8 @@ Wire Wire Line
 	9300 600  9300 1000
 Wire Wire Line
 	9300 600  10750 600 
-Wire Wire Line
-	8800 600  8900 600 
 Wire Wire Line
 	8900 600  9300 600 
-Connection ~ 8900 600 
 Connection ~ 9300 600 
 $Comp
 L Device:R R?
@@ -2451,7 +1950,7 @@ U 1 1 5E86FCBF
 P 10750 1000
 F 0 "R?" H 10680 954 50  0000 R CNN
 F 1 "3.9k" H 10680 1045 50  0000 R CNN
-F 2 "" V 10680 1000 50  0001 C CNN
+F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 10680 1000 50  0001 C CNN
 F 3 "~" H 10750 1000 50  0001 C CNN
 	1    10750 1000
 	-1   0    0    1   
@@ -2473,7 +1972,7 @@ U 1 1 5E897D70
 P 10250 2000
 F 0 "RV?" H 10181 2046 50  0000 R CNN
 F 1 "470" H 10181 1955 50  0000 R CNN
-F 2 "" H 10250 2000 50  0001 C CNN
+F 2 "Potentiometer_SMD:Potentiometer_Bourns_3214X_Vertical" H 10250 2000 50  0001 C CNN
 F 3 "~" H 10250 2000 50  0001 C CNN
 	1    10250 2000
 	1    0    0    -1  
@@ -2499,18 +1998,674 @@ Wire Wire Line
 	10250 1800 10250 1850
 Wire Wire Line
 	10600 2000 10400 2000
-Text HLabel 1000 1750 0    50   Input ~ 0
+Text HLabel 800  1300 0    50   Input ~ 0
 HF_RX
-Text HLabel 7000 5800 0    50   Input ~ 0
+Text HLabel 7000 5800 0    50   Output ~ 0
 SPKR
-Text HLabel 10600 2000 2    50   Input ~ 0
+Text HLabel 10600 2000 2    50   Output ~ 0
 METER
 Text HLabel 6950 1000 0    50   Input ~ 0
 MIC
-Text HLabel 6100 1850 2    50   Input ~ 0
+Text HLabel 6300 1850 2    50   Output ~ 0
 HF_TX
 Text Notes 9450 5100 0    79   ~ 16
 TODO Handle CW
-Text Notes 1050 4500 0    79   ~ 16
-TODO Find appropriate relays
+Text HLabel 9850 5300 0    50   Input ~ 0
+MUTE_SPKR
+Wire Wire Line
+	9850 5300 10200 5300
+Wire Wire Line
+	10200 5300 10200 5600
+Text HLabel 1300 4500 0    50   Input ~ 0
+SWITCH_RELAYn
+Text Label 2800 900  1    50   ~ 0
++8V_TX
+Text Label 7850 1000 1    50   ~ 0
++8V_TX
+Text Label 8900 600  0    50   ~ 0
++8V_RX
+Text Label 4650 4300 2    50   ~ 0
++8V_RX
+Text HLabel 1000 2550 0    50   Input ~ 0
++8V_RX
+Text HLabel 1000 2650 0    50   Input ~ 0
++8V_TX
+Text Label 6250 4050 2    50   ~ 0
++8V_RX
+Text GLabel 8350 4900 1    50   Input ~ 0
++8V
+Text GLabel 8150 2850 0    50   Input ~ 0
++8V
+Wire Wire Line
+	1000 2550 1300 2550
+Text Label 1300 2550 2    50   ~ 0
++8V_RX
+Text Label 1300 2650 2    50   ~ 0
++8V_TX
+Wire Wire Line
+	1300 2650 1000 2650
+$Comp
+L Device:CTRIM_Small C?
+U 1 1 5E9DA7C6
+P 7150 4000
+F 0 "C?" H 7241 4046 50  0000 L CNN
+F 1 "60pF" H 7241 3955 50  0000 L CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric" H 7150 4000 50  0001 C CNN
+F 3 "~" H 7150 4000 50  0001 C CNN
+	1    7150 4000
+	-1   0    0    -1  
+$EndComp
+Wire Wire Line
+	7150 3900 7150 3850
+$Comp
+L Diode:1N4148W D?
+U 1 1 5EA3288A
+P 2250 5000
+F 0 "D?" V 2204 4920 50  0000 R CNN
+F 1 "1N4148W" V 2295 4920 50  0000 R CNN
+F 2 "Diode_SMD:D_SOD-123" H 2250 4825 50  0001 C CNN
+F 3 "https://www.vishay.com/docs/85748/1n4148w.pdf" H 2250 5000 50  0001 C CNN
+	1    2250 5000
+	0    1    1    0   
+$EndComp
+$Comp
+L Relay:G6K-2 K?
+U 1 1 5EA70218
+P 2950 5000
+AR Path="/5EA70218" Ref="K?"  Part="1" 
+AR Path="/5E3088F9/5EA70218" Ref="K?"  Part="1" 
+F 0 "K?" H 3580 5046 50  0000 L CNN
+F 1 "G6K-2F-RF-3V" H 3580 4955 50  0000 L CNN
+F 2 "Relay_SMD:Relay_DPDT_Omron_G6K-2F" H 2950 5000 50  0001 L CNN
+F 3 "http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdf" H 2950 5000 50  0001 C CNN
+	1    2950 5000
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2200 5450 2950 5450
+Wire Wire Line
+	2950 5450 2950 5300
+Wire Wire Line
+	2200 5450 2200 5900
+Wire Wire Line
+	3350 5300 3350 5450
+Wire Wire Line
+	3350 5450 3800 5450
+Wire Wire Line
+	3800 5450 3800 5900
+Connection ~ 4400 4600
+Wire Wire Line
+	4400 4600 3450 4600
+Wire Wire Line
+	3450 4600 3450 4700
+Wire Wire Line
+	4650 4300 4400 4300
+Wire Wire Line
+	4300 3550 4300 4450
+Wire Wire Line
+	4300 4450 3250 4450
+Wire Wire Line
+	3250 4450 3250 4700
+Wire Wire Line
+	4300 3550 4800 3550
+Wire Wire Line
+	3050 4700 3050 2500
+Wire Wire Line
+	2850 4700 2850 4300
+Wire Wire Line
+	2850 4300 4050 4300
+Wire Wire Line
+	2250 2500 3050 2500
+Wire Wire Line
+	4050 1950 4050 4300
+Wire Wire Line
+	2550 5300 2250 5300
+Wire Wire Line
+	2550 4700 2400 4700
+$Comp
+L Device:L L?
+U 1 1 5E5099B5
+P 950 1650
+F 0 "L?" H 906 1696 50  0000 R CNN
+F 1 "20nH" H 906 1605 50  0000 R CNN
+F 2 "Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder" H 950 1650 50  0001 C CNN
+F 3 "~" H 950 1650 50  0001 C CNN
+F 4 "22 loops, 3/10 wire, toroid T37/6" H 950 1650 50  0001 C CNN "Description"
+	1    950  1650
+	-1   0    0    -1  
+$EndComp
+$Comp
+L Device:C_Small C?
+U 1 1 5E50C17E
+P 2400 1650
+F 0 "C?" H 2308 1604 50  0000 R CNN
+F 1 "1.6nF" H 2308 1695 50  0000 R CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric" H 2400 1650 50  0001 C CNN
+F 3 "~" H 2400 1650 50  0001 C CNN
+	1    2400 1650
+	-1   0    0    1   
+$EndComp
+$Comp
+L Device:L L?
+U 1 1 5E50C9FB
+P 2100 1650
+F 0 "L?" H 2056 1696 50  0000 R CNN
+F 1 "20nH" H 2056 1605 50  0000 R CNN
+F 2 "Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder" H 2100 1650 50  0001 C CNN
+F 3 "~" H 2100 1650 50  0001 C CNN
+F 4 "22 loops, 3/10 wire, toroid T37/6" H 2100 1650 50  0001 C CNN "Description"
+	1    2100 1650
+	-1   0    0    -1  
+$EndComp
+Wire Wire Line
+	2400 1550 2400 1500
+Wire Wire Line
+	2400 1500 2100 1500
+Connection ~ 2400 1500
+Wire Wire Line
+	950  1800 600  1800
+Wire Wire Line
+	600  1800 600  1750
+$Comp
+L Device:L L?
+U 1 1 5E55B461
+P 1400 1550
+F 0 "L?" V 1312 1550 50  0000 C CNN
+F 1 "130nH" V 1221 1550 50  0000 C CNN
+F 2 "Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder" H 1400 1550 50  0001 C CNN
+F 3 "~" H 1400 1550 50  0001 C CNN
+F 4 "22 loops, 3/10 wire, toroid T37/6" H 1400 1550 50  0001 C CNN "Description"
+	1    1400 1550
+	0    1    -1   0   
+$EndComp
+Connection ~ 950  1800
+Wire Wire Line
+	1300 1200 1250 1200
+Wire Wire Line
+	1500 1200 1550 1200
+Wire Wire Line
+	1550 1200 1550 1550
+$Comp
+L Device:C_Small C?
+U 1 1 5E59FB33
+P 1700 1200
+F 0 "C?" V 1563 1200 50  0000 C CNN
+F 1 "240pF" V 1472 1200 50  0000 C CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric" H 1700 1200 50  0001 C CNN
+F 3 "~" H 1700 1200 50  0001 C CNN
+	1    1700 1200
+	0    -1   -1   0   
+$EndComp
+$Comp
+L Device:L L?
+U 1 1 5E59FB3E
+P 1700 1550
+F 0 "L?" V 1600 1550 50  0000 C CNN
+F 1 "180nH" V 1500 1550 50  0000 C CNN
+F 2 "Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder" H 1700 1550 50  0001 C CNN
+F 3 "~" H 1700 1550 50  0001 C CNN
+F 4 "22 loops, 3/10 wire, toroid T37/6" H 1700 1550 50  0001 C CNN "Description"
+	1    1700 1550
+	0    1    -1   0   
+$EndComp
+Wire Wire Line
+	1800 1200 1850 1200
+Wire Wire Line
+	1850 1200 1850 1500
+Connection ~ 1550 1550
+Wire Wire Line
+	1600 1200 1550 1200
+Connection ~ 1550 1200
+Wire Wire Line
+	1250 1200 1250 1500
+Wire Wire Line
+	800  1300 850  1300
+Wire Wire Line
+	850  1300 850  1500
+Wire Wire Line
+	850  1500 950  1500
+Wire Wire Line
+	950  1800 2100 1800
+Wire Wire Line
+	950  1500 1250 1500
+Connection ~ 950  1500
+Connection ~ 1250 1500
+Wire Wire Line
+	1250 1500 1250 1550
+Wire Wire Line
+	1850 1500 2100 1500
+Connection ~ 1850 1500
+Wire Wire Line
+	1850 1500 1850 1550
+Connection ~ 2100 1500
+Wire Wire Line
+	600  1550 600  1500
+Wire Wire Line
+	600  1500 850  1500
+Connection ~ 850  1500
+Text Notes 850  2250 0    50   ~ 0
+3rd order Elliptic Bandpass\n27MHz - 29.60MHz cutoff\n0.3dB ripple, -40dB stopband
+$Comp
+L Connector_Generic:Conn_01x03 J?
+U 1 1 5E6B38C3
+P 900 600
+F 0 "J?" V 864 780 50  0000 L CNN
+F 1 "RX Filt in" V 773 780 50  0000 L CNN
+F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 900 600 50  0001 C CNN
+F 3 "~" H 900 600 50  0001 C CNN
+	1    900  600 
+	0    1    -1   0   
+$EndComp
+$Comp
+L Connector_Generic:Conn_01x03 J?
+U 1 1 5E6B652F
+P 1950 600
+F 0 "J?" V 1914 780 50  0000 L CNN
+F 1 "RX Filt out" V 1823 780 50  0000 L CNN
+F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 1950 600 50  0001 C CNN
+F 3 "~" H 1950 600 50  0001 C CNN
+	1    1950 600 
+	0    1    -1   0   
+$EndComp
+$Comp
+L power:GNDA #PWR?
+U 1 1 5E6B6B09
+P 1000 800
+F 0 "#PWR?" H 1000 550 50  0001 C CNN
+F 1 "GNDA" H 1005 627 50  0000 C CNN
+F 2 "" H 1000 800 50  0001 C CNN
+F 3 "" H 1000 800 50  0001 C CNN
+	1    1000 800 
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GNDA #PWR?
+U 1 1 5E6B6D6D
+P 2050 850
+F 0 "#PWR?" H 2050 600 50  0001 C CNN
+F 1 "GNDA" H 2055 677 50  0000 C CNN
+F 2 "" H 2050 850 50  0001 C CNN
+F 3 "" H 2050 850 50  0001 C CNN
+	1    2050 850 
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2050 850  2050 800 
+Wire Wire Line
+	1850 850  1850 800 
+Connection ~ 2050 850 
+Wire Wire Line
+	2050 850  1850 850 
+Text Label 500  850  0    50   ~ 0
++8V_RX
+Wire Wire Line
+	500  850  800  850 
+Wire Wire Line
+	800  850  800  800 
+Wire Wire Line
+	900  800  900  1300
+Wire Wire Line
+	900  1300 850  1300
+Connection ~ 850  1300
+Wire Wire Line
+	1950 800  1950 1200
+Wire Wire Line
+	1950 1200 1850 1200
+Connection ~ 1850 1200
+Text Notes 1200 950  0    50   ~ 0
+Headers allow\nplug-in filters
+$Comp
+L Device:C_Small C?
+U 1 1 5E814A7F
+P 5300 1550
+F 0 "C?" V 5529 1550 50  0000 C CNN
+F 1 "180pF" V 5438 1550 50  0000 C CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric" H 5300 1550 50  0001 C CNN
+F 3 "~" H 5300 1550 50  0001 C CNN
+	1    5300 1550
+	0    -1   -1   0   
+$EndComp
+$Comp
+L Device:C_Small C?
+U 1 1 5E814A89
+P 4500 2000
+F 0 "C?" H 4408 1954 50  0000 R CNN
+F 1 "1.6nF" H 4408 2045 50  0000 R CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric" H 4500 2000 50  0001 C CNN
+F 3 "~" H 4500 2000 50  0001 C CNN
+	1    4500 2000
+	-1   0    0    1   
+$EndComp
+$Comp
+L power:GNDA #PWR?
+U 1 1 5E814A93
+P 4850 2150
+F 0 "#PWR?" H 4850 1900 50  0001 C CNN
+F 1 "GNDA" H 4855 1977 50  0000 C CNN
+F 2 "" H 4850 2150 50  0001 C CNN
+F 3 "" H 4850 2150 50  0001 C CNN
+	1    4850 2150
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:L L?
+U 1 1 5E814AA3
+P 4850 2000
+F 0 "L?" H 4806 2046 50  0000 R CNN
+F 1 "20nH" H 4806 1955 50  0000 R CNN
+F 2 "Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder" H 4850 2000 50  0001 C CNN
+F 3 "~" H 4850 2000 50  0001 C CNN
+F 4 "22 loops, 3/10 wire, toroid T37/6" H 4850 2000 50  0001 C CNN "Description"
+	1    4850 2000
+	-1   0    0    -1  
+$EndComp
+$Comp
+L Device:C_Small C?
+U 1 1 5E814AAD
+P 6300 2000
+F 0 "C?" H 6208 1954 50  0000 R CNN
+F 1 "1.6nF" H 6208 2045 50  0000 R CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric" H 6300 2000 50  0001 C CNN
+F 3 "~" H 6300 2000 50  0001 C CNN
+	1    6300 2000
+	-1   0    0    1   
+$EndComp
+$Comp
+L Device:L L?
+U 1 1 5E814AB8
+P 6000 2000
+F 0 "L?" H 5956 2046 50  0000 R CNN
+F 1 "20nH" H 5956 1955 50  0000 R CNN
+F 2 "Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder" H 6000 2000 50  0001 C CNN
+F 3 "~" H 6000 2000 50  0001 C CNN
+F 4 "22 loops, 3/10 wire, toroid T37/6" H 6000 2000 50  0001 C CNN "Description"
+	1    6000 2000
+	-1   0    0    -1  
+$EndComp
+Wire Wire Line
+	6300 1900 6300 1850
+Wire Wire Line
+	6300 1850 6000 1850
+Wire Wire Line
+	4850 2150 4500 2150
+Wire Wire Line
+	4500 2150 4500 2100
+$Comp
+L Device:L L?
+U 1 1 5E814AC9
+P 5300 1900
+F 0 "L?" V 5490 1900 50  0000 C CNN
+F 1 "130nH" V 5399 1900 50  0000 C CNN
+F 2 "Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder" H 5300 1900 50  0001 C CNN
+F 3 "~" H 5300 1900 50  0001 C CNN
+F 4 "22 loops, 3/10 wire, toroid T37/6" H 5300 1900 50  0001 C CNN "Description"
+	1    5300 1900
+	0    1    -1   0   
+$EndComp
+Connection ~ 4850 2150
+Wire Wire Line
+	5200 1550 5150 1550
+Wire Wire Line
+	5400 1550 5450 1550
+Wire Wire Line
+	5450 1550 5450 1900
+$Comp
+L Device:C_Small C?
+U 1 1 5E814AD8
+P 5600 1550
+F 0 "C?" V 5829 1550 50  0000 C CNN
+F 1 "240pF" V 5738 1550 50  0000 C CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric" H 5600 1550 50  0001 C CNN
+F 3 "~" H 5600 1550 50  0001 C CNN
+	1    5600 1550
+	0    -1   -1   0   
+$EndComp
+$Comp
+L Device:L L?
+U 1 1 5E814AE3
+P 5600 1900
+F 0 "L?" V 5790 1900 50  0000 C CNN
+F 1 "180nH" V 5699 1900 50  0000 C CNN
+F 2 "Inductor_SMD:L_1210_3225Metric_Pad1.42x2.65mm_HandSolder" H 5600 1900 50  0001 C CNN
+F 3 "~" H 5600 1900 50  0001 C CNN
+F 4 "22 loops, 3/10 wire, toroid T37/6" H 5600 1900 50  0001 C CNN "Description"
+	1    5600 1900
+	0    1    -1   0   
+$EndComp
+Wire Wire Line
+	5700 1550 5750 1550
+Wire Wire Line
+	5750 1550 5750 1850
+Connection ~ 5450 1900
+Wire Wire Line
+	5500 1550 5450 1550
+Connection ~ 5450 1550
+Wire Wire Line
+	5150 1550 5150 1850
+Wire Wire Line
+	4850 2150 6000 2150
+Wire Wire Line
+	4850 1850 5150 1850
+Connection ~ 4850 1850
+Connection ~ 5150 1850
+Wire Wire Line
+	5150 1850 5150 1900
+Wire Wire Line
+	5750 1850 6000 1850
+Connection ~ 5750 1850
+Wire Wire Line
+	5750 1850 5750 1900
+Connection ~ 6000 1850
+Wire Wire Line
+	4500 1900 4500 1850
+$Comp
+L Connector_Generic:Conn_01x03 J?
+U 1 1 5E814B02
+P 4550 1250
+F 0 "J?" V 4514 1430 50  0000 L CNN
+F 1 "TX Filt in" V 4423 1430 50  0000 L CNN
+F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 4550 1250 50  0001 C CNN
+F 3 "~" H 4550 1250 50  0001 C CNN
+	1    4550 1250
+	0    1    -1   0   
+$EndComp
+$Comp
+L Connector_Generic:Conn_01x03 J?
+U 1 1 5E814B0C
+P 6000 1350
+F 0 "J?" V 5964 1530 50  0000 L CNN
+F 1 "VX Filt out" V 5873 1530 50  0000 L CNN
+F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 6000 1350 50  0001 C CNN
+F 3 "~" H 6000 1350 50  0001 C CNN
+	1    6000 1350
+	0    1    -1   0   
+$EndComp
+$Comp
+L power:GNDA #PWR?
+U 1 1 5E814B16
+P 4650 1450
+F 0 "#PWR?" H 4650 1200 50  0001 C CNN
+F 1 "GNDA" H 4655 1277 50  0000 C CNN
+F 2 "" H 4650 1450 50  0001 C CNN
+F 3 "" H 4650 1450 50  0001 C CNN
+	1    4650 1450
+	1    0    0    -1  
+$EndComp
+$Comp
+L power:GNDA #PWR?
+U 1 1 5E814B20
+P 6100 1600
+F 0 "#PWR?" H 6100 1350 50  0001 C CNN
+F 1 "GNDA" H 6105 1427 50  0000 C CNN
+F 2 "" H 6100 1600 50  0001 C CNN
+F 3 "" H 6100 1600 50  0001 C CNN
+	1    6100 1600
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	6100 1600 6100 1550
+Wire Wire Line
+	5900 1600 5900 1550
+Connection ~ 6100 1600
+Wire Wire Line
+	6100 1600 5900 1600
+Text Label 4150 1500 0    50   ~ 0
++8V_TX
+Wire Wire Line
+	4150 1500 4450 1500
+Wire Wire Line
+	4450 1500 4450 1450
+Wire Wire Line
+	4500 1850 4550 1850
+Text Notes 5000 2400 0    50   ~ 0
+3rd order Elliptic Bandpass\n27MHz - 29.60MHz cutoff\n0.3dB ripple, -40dB stopband
+Wire Wire Line
+	4450 1850 4500 1850
+Connection ~ 4500 1850
+Wire Wire Line
+	4550 1450 4550 1850
+Connection ~ 4550 1850
+Wire Wire Line
+	4550 1850 4850 1850
+Wire Wire Line
+	6000 1550 6000 1850
+Wire Wire Line
+	6000 2150 6300 2150
+Wire Wire Line
+	6300 2150 6300 2100
+Connection ~ 6000 2150
+Wire Wire Line
+	2400 1750 2400 1800
+Wire Wire Line
+	2400 1800 2100 1800
+Connection ~ 2100 1800
+$Comp
+L mpb:BAT18 D?
+U 1 1 5E98708F
+P 3150 1050
+F 0 "D?" V 3129 1128 50  0000 L CNN
+F 1 "BAT18" V 3220 1128 50  0000 L CNN
+F 2 "Package_TO_SOT_SMD:SOT-23_Handsoldering" H 3150 1100 50  0001 C CNN
+F 3 "~" H 3150 1050 50  0001 C CNN
+	1    3150 1050
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	2800 1200 3150 1200
+Connection ~ 3150 1200
+$Comp
+L mpb:BAT18 D?
+U 1 1 5E9B8B08
+P 4400 4750
+F 0 "D?" V 4446 4671 50  0000 R CNN
+F 1 "BAT18" V 4355 4671 50  0000 R CNN
+F 2 "Package_TO_SOT_SMD:SOT-23_Handsoldering" H 4400 4800 50  0001 C CNN
+F 3 "~" H 4400 4750 50  0001 C CNN
+	1    4400 4750
+	0    -1   -1   0   
+$EndComp
+$Comp
+L power:+3.3V #PWR?
+U 1 1 5ECCA8C1
+P 2400 4200
+AR Path="/5E2FA006/5ECCA8C1" Ref="#PWR?"  Part="1" 
+AR Path="/5ECCA8C1" Ref="#PWR?"  Part="1" 
+AR Path="/5E3088F9/5ECCA8C1" Ref="#PWR?"  Part="1" 
+F 0 "#PWR?" H 2400 4050 50  0001 C CNN
+F 1 "+3.3V" H 2300 4350 50  0000 L CNN
+F 2 "" H 2400 4200 50  0001 C CNN
+F 3 "" H 2400 4200 50  0001 C CNN
+	1    2400 4200
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2250 4850 2250 4700
+Wire Wire Line
+	2250 5300 2250 5150
+$Comp
+L Transistor_BJT:BC856W Q?
+U 1 1 5ED2EEC6
+P 2300 4500
+AR Path="/5E4C0E28/5ED2EEC6" Ref="Q?"  Part="1" 
+AR Path="/5E2DC494/5ED2EEC6" Ref="Q?"  Part="1" 
+AR Path="/5E3088F9/5ED2EEC6" Ref="Q?"  Part="1" 
+F 0 "Q?" H 2490 4454 50  0000 L CNN
+F 1 "BC856W" H 2490 4545 50  0000 L CNN
+F 2 "Package_TO_SOT_SMD:SOT-323_SC-70" H 2500 4425 50  0001 L CIN
+F 3 "http://www.fairchildsemi.com/ds/BC/BC856.pdf" H 2300 4500 50  0001 L CNN
+	1    2300 4500
+	1    0    0    1   
+$EndComp
+$Comp
+L Device:R R?
+U 1 1 5ED2EECC
+P 2000 4350
+AR Path="/5E4C0E28/5ED2EECC" Ref="R?"  Part="1" 
+AR Path="/5E2DC494/5ED2EECC" Ref="R?"  Part="1" 
+AR Path="/5E3088F9/5ED2EECC" Ref="R?"  Part="1" 
+F 0 "R?" H 2070 4396 50  0000 L CNN
+F 1 "4k7" H 2070 4305 50  0000 L CNN
+F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 1930 4350 50  0001 C CNN
+F 3 "~" H 2000 4350 50  0001 C CNN
+	1    2000 4350
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2400 4300 2400 4200
+$Comp
+L Diode:1N4148W D?
+U 1 1 5ED2EED3
+P 1450 4500
+AR Path="/5E3088F9/5ED2EED3" Ref="D?"  Part="1" 
+AR Path="/5E4C0E28/5ED2EED3" Ref="D?"  Part="1" 
+AR Path="/5E2DC494/5ED2EED3" Ref="D?"  Part="1" 
+F 0 "D?" H 1450 4717 50  0000 C CNN
+F 1 "1N4148W" H 1450 4626 50  0000 C CNN
+F 2 "Diode_SMD:D_SOD-123" H 1450 4325 50  0001 C CNN
+F 3 "https://www.vishay.com/docs/85748/1n4148w.pdf" H 1450 4500 50  0001 C CNN
+	1    1450 4500
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	2100 4500 2000 4500
+Connection ~ 2000 4500
+Wire Wire Line
+	2400 4200 2000 4200
+$Comp
+L power:GND #PWR?
+U 1 1 5EDC4BF1
+P 2250 5300
+AR Path="/5E2FA006/5EDC4BF1" Ref="#PWR?"  Part="1" 
+AR Path="/5E2DC494/5EDC4BF1" Ref="#PWR?"  Part="1" 
+AR Path="/5E3088F9/5EDC4BF1" Ref="#PWR?"  Part="1" 
+F 0 "#PWR?" H 2250 5050 50  0001 C CNN
+F 1 "GND" V 2255 5172 50  0000 R CNN
+F 2 "" H 2250 5300 50  0001 C CNN
+F 3 "" H 2250 5300 50  0001 C CNN
+	1    2250 5300
+	0    1    1    0   
+$EndComp
+Connection ~ 2250 5300
+Connection ~ 2400 4200
+Connection ~ 2400 4700
+Wire Wire Line
+	2400 4700 2250 4700
+Wire Wire Line
+	1900 4500 2000 4500
+$Comp
+L Device:R R?
+U 1 1 5EE2A6BC
+P 1750 4500
+AR Path="/5E4C0E28/5EE2A6BC" Ref="R?"  Part="1" 
+AR Path="/5E2DC494/5EE2A6BC" Ref="R?"  Part="1" 
+AR Path="/5E3088F9/5EE2A6BC" Ref="R?"  Part="1" 
+F 0 "R?" V 1543 4500 50  0000 C CNN
+F 1 "100" V 1634 4500 50  0000 C CNN
+F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 1680 4500 50  0001 C CNN
+F 3 "~" H 1750 4500 50  0001 C CNN
+	1    1750 4500
+	0    1    1    0   
+$EndComp
+Text GLabel 3450 550  0    50   Input ~ 0
++8V
 $EndSCHEMATC
-- 
cgit v1.2.3