Duplexers: SYSCOM
COMPACT BAND REJECT DUPLEXERS FOR DUPLEX MOBILE RADIOS OR REPEATERS UP TO 50 WATTS.
If you want quality, go with the GRAY ONE: SYSCOM Duplexer.
Not only does it look different, It is Different!
SYS-1533 - VHF version
SYS-1533. Compact helical VHF duplexer, for full duplex mobile radios or low power repeaters. It uses six cavities of extruded 6063-T5 aluminum. Inner lines are tin plated copper wires. To improve Tx-Rx isolation, conformable coaxial cable is used. For additional protection, the entire unit is corrosion proof painted.
| Model | Frequency | Cavities | Price |
| SYS-1533-1 SYS-1533-2 SYS-1533-3 |
136-148MHz. 148-160MHz. 160-174MHz. |
6 | $350.00 |
| SYS-1533-1 SYS-1533-2 SYS-1533-3 |
136-148MHz. 148-160MHz. 160-174MHz. |
4 | $264.00 |
SYS-4533 - UHF version
SYS-4533 is a compact, full 1/4 wave UHF coaxial duplexer, intended for use in mobile service
or inside low powerful duplex radiotelephones. Inner lines are copper pipes silver plated. It uses
four or six cavities of extruded 6063-T5 aluminum. To improve Tx-Rx isolation, conformable
coaxial cable is used. For additional protection, the entire unit is painted.
* Better selectivity.
* Reduces insertion loss.
* Increases performance gradually
* One of the best duplexers of the world!!
* Totally manufactured in Mexico.
* Economic.
| Model | Frequency | Min. Sep. | Cavities | Price |
| SYS-4533-1P SYS-4533-2P SYS-4533-3P SYS-4533-4P |
403-430MHz. 440-470MHz. 470-490MHz. 490-520MHz. |
4MHz | 6 |
$382.00 |
| SYS-4533-1-4P SYS-4533-2-4P SYS-4533-3-4P SYS-4533-4-4P |
403-430MHz. 440-470MHz. 470-490MHz. 490-520MHz. |
5MHz | 4 | $294.00 |
SYS-4533 is a compact, full 1/4 wave UHF coaxial duplexer, intended for use in mobile service or inside low power full duplex radiotelephones. Inner lines are copper pipes polished with corrosion proof paint. It uses six cavities of extruded 6063-T5 aluminum. To improve Tx-Rx isolation, conformable coaxial cable is used. For additional protection, the entire unit is painted.
Electrical Specifications:
Frequency Spacing: 5 to10 MHz max.
Power: 50 watts Max.
Insertion Loss, Tx-Ant.: 1.4 dB max 1.2 dB. typ
Insertion Loss, Ant.-Rx: 1.4 dB max 1.2 dB. typ
TX Noise Suppression at RX Freq.: 80 dB min.
VSWR: 1.5:1 max.
Impedance: 50 Ohms
Connectors: BNC ( N, UHF Optional )
Temperature Range: -30¼ to +60¼C


