Atlas 210x User Manual

4-20. PC-1010/1020 Low Pass Filters
PC-1010/1020 is a band switched two section low pass filter. The filter is connected between the output of the Power
Amplifier (PC-500D) and the antenna connector to suppress harmonics 30 dB or more. The filters are designed for a
50 ohm load and it is important that the load be quite close to 50 ohms, non-reactive. The low pass filter is also used
during receiving operations to suppress possible interference from strong local VHF signals.
PC-1010/1020 CIRCUIT COMPONENTS AND FREQUENCY CUTOFF (fe)
MODEL210x
MODEL 215x
Component Freq. Cutoff Band
Circuit
Component Freq.
Cutoff
C1001 ..... 820pF5%SM FC I 1 C1016 .... 2200pF 5%SM FC 1
C1002 .......... 1300 5200 Khz C1017 .......... 2200 25 00 Khz
C1003 ........... 820 C1018 .......... 2200
L1001-1002 1.8 uH Toroidal L1011-1012 2.9 uH Toroidal
C1004 ..... 430pF5%SM
FC 2
2
C1019 ..... 820pF 5%SM
FC 2
C1005 ........... 680
10,000 Khz
C1020 .......... 1300
5200 Khz
C1006 ........... 430 C1021 ........... 820
L1003-1004 . .95 uH Toroidal L1013-1014 1.8 uH Toroidal
C1007 ..... 180pF 5%SM
FC 3
3
C1022 ..... 430pF 5%SM
FC3
C1008 ........... 330 20,000 Khz C1023 ........... 680 10,000 Khz
C1009 ........... 220 C1024 ........... 430
L1005-1006 .48 uH Toroidal L1014-1016 .95 uH Toroidal
C1010 ...... 68pF 5%SM FC 4 4 C1025 ..... 180pF 5%SM FC 4
C1011 ........... 270 25,000 Khz C1026 ........;.. 330 20,000 Khz
C1012 ........... 180 C1027 ........... 220
L1007-1008 .32 uH Toroidal L1017-1018 .48 uH Toroidal
C1013 ..... 100pF5%SM FC 5 5 C1028 ..... 100pF5%SM PC 5
C1014 ........... 180 35,000 Khz C1029 ........... 270 25,000 Khz
C1015 ........... 100 C1030 ........... 180
L1009-1010 .24 uH Toroidal L1019-1020 .32 uH Toroidal
44

Atlas 210x Specifications

General

Brand	Atlas
Model	210x
Category	Transceiver
Language	English