diff options
| -rw-r--r-- | kicad/mmrf1021-pa.sch | 37 |
1 files changed, 18 insertions, 19 deletions
diff --git a/kicad/mmrf1021-pa.sch b/kicad/mmrf1021-pa.sch index d3f501c..c3e8ef6 100644 --- a/kicad/mmrf1021-pa.sch +++ b/kicad/mmrf1021-pa.sch @@ -5,7 +5,7 @@ $Descr A4 11693 8268 encoding utf-8 Sheet 1 1 Title "MMRF1021 VHF amplifier" -Date "2020-11-24" +Date "2020-12-07" Rev "" Comp "HB9EGM" Comment1 "" @@ -149,10 +149,9 @@ L Device:C C6 U 1 1 5FB943C4 P 3250 5350 F 0 "C6" V 2998 5350 50 0000 C CNN -F 1 "100pF" V 3089 5350 50 0000 C CNN +F 1 "1nF" V 3089 5350 50 0000 C CNN F 2 "Capacitor_SMD:C_0805_2012Metric" H 3288 5200 50 0001 C CNN F 3 "~" H 3250 5350 50 0001 C CNN -F 4 "VJ0805A101GXXCW1BC" V 3250 5350 50 0001 C CNN "MPN" 1 3250 5350 0 1 1 0 $EndComp @@ -164,7 +163,7 @@ L Device:R R1 U 1 1 5FB94A4B P 3550 5650 F 0 "R1" H 3620 5696 50 0000 L CNN -F 1 "DNF" H 3620 5605 50 0000 L CNN +F 1 "300" H 3620 5605 50 0000 L CNN F 2 "Resistor_SMD:R_0805_2012Metric" V 3480 5650 50 0001 C CNN F 3 "~" H 3550 5650 50 0001 C CNN 1 3550 5650 @@ -175,7 +174,7 @@ L Device:R R3 U 1 1 5FB94CB2 P 3950 5650 F 0 "R3" H 4020 5696 50 0000 L CNN -F 1 "DNF" H 4020 5605 50 0000 L CNN +F 1 "300" H 4020 5605 50 0000 L CNN F 2 "Resistor_SMD:R_0805_2012Metric" V 3880 5650 50 0001 C CNN F 3 "~" H 3950 5650 50 0001 C CNN 1 3950 5650 @@ -186,7 +185,7 @@ L Device:R R2 U 1 1 5FB94F80 P 3750 5350 F 0 "R2" V 3543 5350 50 0000 C CNN -F 1 "0" V 3634 5350 50 0000 C CNN +F 1 "18" V 3634 5350 50 0000 C CNN F 2 "Resistor_SMD:R_0805_2012Metric" V 3680 5350 50 0001 C CNN F 3 "~" H 3750 5350 50 0001 C CNN 1 3750 5350 @@ -606,14 +605,14 @@ F 3 "~" H 750 1000 50 0001 C CNN 1 750 1000 -1 0 0 1 $EndComp -Text Notes 6850 5000 0 50 ~ 0 -1:9 Balun wound\non binocular core +Text Notes 6850 5100 0 50 ~ 0 +1:9 Balun wound\non binocular core\nEPCOS\nBA0001X001 $Comp L Device:L L2 U 1 1 5FBF86A4 P 5150 4750 F 0 "L2" H 5202 4796 50 0000 L CNN -F 1 "470nH" H 5202 4705 50 0000 L CNN +F 1 "1uH" H 5202 4705 50 0000 L CNN F 2 "Inductor_SMD:L_1008_2520Metric" H 5150 4750 50 0001 C CNN F 3 "~" H 5150 4750 50 0001 C CNN F 4 "LQW2UASR47F00L" H 5150 4750 50 0001 C CNN "MPN" @@ -625,10 +624,9 @@ L Device:C C3 U 1 1 5FBF9029 P 1800 5350 F 0 "C3" V 1548 5350 50 0000 C CNN -F 1 "100pF" V 1639 5350 50 0000 C CNN +F 1 "1nF" V 1639 5350 50 0000 C CNN F 2 "Capacitor_SMD:C_0805_2012Metric" H 1838 5200 50 0001 C CNN F 3 "~" H 1800 5350 50 0001 C CNN -F 4 "VJ0805A101GXXCW1BC" V 1800 5350 50 0001 C CNN "MPN" 1 1800 5350 0 1 1 0 $EndComp @@ -848,10 +846,9 @@ L Device:C C15 U 1 1 5FCD8B00 P 4950 5350 F 0 "C15" V 4698 5350 50 0000 C CNN -F 1 "100pF" V 4789 5350 50 0000 C CNN +F 1 "1nF" V 4789 5350 50 0000 C CNN F 2 "Capacitor_SMD:C_0805_2012Metric" H 4988 5200 50 0001 C CNN F 3 "~" H 4950 5350 50 0001 C CNN -F 4 "VJ0805A101GXXCW1BC" V 4950 5350 50 0001 C CNN "MPN" 1 4950 5350 0 1 1 0 $EndComp @@ -1016,19 +1013,19 @@ Connection ~ 5150 3850 Text Notes 6000 5150 0 50 ~ 0 D1 and Q1 in\nthermal contact Wire Notes Line - 5450 4750 6650 4750 + 5400 4750 6650 4750 Wire Notes Line 6650 4750 6650 5550 Wire Notes Line - 6650 5550 5450 5550 + 6650 5550 5400 5550 Wire Notes Line - 5450 5550 5450 4750 + 5400 5550 5400 4750 $Comp L Device:C C18 U 1 1 5FC6427F P 1300 5350 F 0 "C18" V 1048 5350 50 0000 C CNN -F 1 "100pF" V 1139 5350 50 0000 C CNN +F 1 "0 Ohm" V 1139 5350 50 0000 C CNN F 2 "Capacitor_SMD:C_0805_2012Metric" H 1338 5200 50 0001 C CNN F 3 "~" H 1300 5350 50 0001 C CNN F 4 "VJ0805A101GXXCW1BC" V 1300 5350 50 0001 C CNN "MPN" @@ -1126,8 +1123,8 @@ Text Notes 5450 950 0 50 ~ 0 Connection ~ 5750 1350 Text Notes 1750 6200 0 50 ~ 0 PGA-102+ possible instead\nPlace 30 Ohm or 2.7V Zener\nin series with L1 for 80mA -Text Notes 3450 7100 0 50 ~ 0 -LC match with R6 = 12nH and C15=100pF\ntransforms 50Ohm into around 2Ohms.\nhttps://www.leleivre.com/rf_lcmatch.html +Text Notes 5450 7500 0 39 ~ 0 +Previously tried with LC match that\nwas prone to make self-oscillations:\nwith R6 = 12nH and C15=100pF\ntransforms 50Ohm into around 2Ohms.\nhttps://www.leleivre.com/rf_lcmatch.html\n\nR4 = 12pF suppresses 158MHz oscillation Text Notes 6850 3800 0 50 ~ 0 C19:\n100pF Xc = 11Ohm\n1nF Xc = 1Ohm\n@144MHz Connection ~ 5950 2450 @@ -1144,4 +1141,6 @@ F 4 "1812SMS-39NJLC" H 5950 2600 50 0001 C CNN "MPN" 1 5950 2600 1 0 0 -1 $EndComp +Text Notes 3450 7450 0 50 ~ 0 +Something to try:\nRemove attenuator, and have\nR4 DNF\nR5 0 Ohm\nR6 100pF in series with 100 Ohm\nC15 0 Ohm $EndSCHEMATC |