Duplexers

Duplexer/Splitter/Combiner

Comet calls these “duplexers”, but they are also referred to as combiners or splitters.

They are basically band-pass filters, simultaneously passing RF in both directions through the common connector while the band-pass filters provide a high degree of isolation between ports.

• TX and RX from two radios at the same time into a dual-band antenna
• Combine a dual-band radio with separate outputs into a dual-band antenna
• Separate a single connector duplexed radio into separate antenna systems
• Allow a single coax run into two antennas at the top of the tower, and two radios at the bottom by using a duplexer at both ends of the coax run, avoiding cost and weight.

Choose from versions with a variety of band-pass frequency ranges, coax leads or no leads, and connector combinations.

**NOTE**  Using a dualband radio, and a separate 220MHz radio, into a single triband antenna

We are frequently asked if we have a Duplexer or Triplexer that will allow a dualband radio (with a single connector), and a single band 220MHz radio, to be used with the Comet CX-333 triband base antenna and/or Comet SBB-224 triband mobile antenna.

The answer is:  You need to use both a duplexer AND a triplexer to accomplish that.
First:  Use the CF-4160J, with the common port screwed into the dualband radio, you’ll need your own jumper terminating in a PL-259 on both ends.  With the CF-4160J in place you have effectively turned the single connector on the radio back into two separate antenna connector….one for 2M and one for 440.
Next:  Use the Comet CFX-324A triplexer
The 2M connector on the CFX-324A screws into the 2M port on the CF-4160J
The 220Mz connector on the CFX-324A screws into the 220MHz radio
The 440MHz connector on the CFX-324A screws into the 440MHz port on the CF-4160J

This enables TX and RX on all three bands simultaneously!

HF-2M/220-440MHz Duplexer

                        Band Pass      Ins Loss      Max Power
Low Pass:      1.3-150MHz       0.2dB            600W PEP
High Pass:     200-480MHz       0.3dB            400W PEP

Isolation: 40dB

CONNECTORS:
Common:  SO-239
Low pass:  PL-259
High pass:  PL-259

HF/6M – 440MHz Duplexer

                        Band Pass        Ins Loss           Max Power
Low Pass:    1.3-30MHz            0.2dB                  600W PEP
High Pass:   49-470MHz            0.2dB                  600W PEP

Isolation: 45dB minimum

CONNECTORS:
Common: SO-239
Low Pass: PL-259
High Pass: PL-259

                       Band Pass    Ins Loss     Max Power
Low Pass:    1.3-170MHz       0.1dB          800W PEP
High Pass:  350-540MHz     0.2dB         500W PEP

Isolation: 60dB minimum

CONNECTORS:

CF-4160K

Common: SO-239
Low Pass: PL-259
High Pass: PL-259

CF-4160I
Common: SO-239
Low Pass: PL-259
High Pass: N-Male

CF-4160J

All UHF-female connectors. Choose your own length jumper between your radio and the duplexer.

Common: SO-239
Low Pass: SO-239
High Pass: SO-239

CF-4160N

All N-female connectors allows low-loss N-type connectors with a jumper length of your own choosing.

Common:  N-Female
Low Pass:  N-Female
High Pass:  N-Female

                         Band Pass        Ins Loss     Max Power
Low Pass:      1.3-170MHz       0.15dB         800W PEP
High Pass:      350-540MHz      0.25dB         500W PEP

Isolation: 60dB minimum

CONNECTORS:

CF-416A
Common: SO-239
Low pass: PL-259
High pass: PL-259

CF-416B
Common: SO-239
Low Pass: PL-259
High Pass: N-Male

CF-416C
Common: N-Female
Low Pass: PL-259
High Pass: N-Male

Broad band-pass ranges allow multiple options:

• 2M/440MHz
• 220/440MHz
• 2M/1200MHz
• 220/1200MHz
• HF/440MHz
• Etc…….

                          Band Pass       Ins Loss    Max Power
Low Pass:     1.3-250MHz            .2dB          400W PEP
High Pass:   400-1400MHz        .25-.30dB     200W PEP

Isolation: 30dB minimum

CONNECTORS:
Common: N-Female
Low Pass: PL-259
High Pass: N-Male

HF-6M-2M/440MHz Duplexer
For the IC-706/MKII/G FT-100, etc..

                      Band Pass      Ins Loss      Max Power
Low Pass:    1.3-90MHz         .2dB            600W PEP
High Pass:  125-470MHz        .2dB             600W PEP

Isolation: 45dB minimum

CONNECTORS:
Common: SO-239
Low Pass: PL-259
High Pass: PL-259

                       Band Pass          Ins Loss      Max Power
Low Pass:    1.3-90MHz         .2dB           600W PEP
High Pass:  125-470MHz        .2dB           600W PEP

Common: PL-259
Low Pass: SO-239
High Pass: SO-239

HF-6M/2M-440MHz duplexer for the IC-706/MKII/G, FT-100, etc..

To match the RX freq range of the IC-706MKII/G the CF-706A was engineered to pass the commercial FM band of 88-108MHz.

                       Band Pass      Ins. Loss      Max Power
Low Pass:    1.3-57MHz          0.4dB             350w PEP
High Pass:   75-550MHz          0.4dB             350w PEP

Isolation: 40dB minimum

CONNECTORS:
Common: SO-239
Low pass: PL-259
High Pass: PL-259