Link: Triplexer Systems

 The 4O3A Signature Series HF Triplexer System enables a single triband 20/15/10 meter antenna (typically a Yagi) fed with a single coaxial feedline to be used by three stations each running 1.5 kW simultaneously. Truly a "game changer" for SO2R and multi-operator contest stations, DXpeditions and Field Day groups.  Eliminates the need for separate monoband Yagis on the 20m, 15m and 10m bands. Three operators, three stations and three amps but only one feedline and one antenna!  The System uses a high power combiner, which connects to a triband single feedline 20m/15m/10m antenna. On the opposite side of the combiner are 4O3A Series XL Bandpass Filters for 20m/15m/10m. When analyzing the investment bear in mind the savings in antennas, towers, feedlines and maintenance that will accrue.  4O3A himself replaced many of the rotatable monoband Yagis at his mountaintop contest station with tribanders set in fixed directions feeding Triplexer Systems.  The Triplexer System and Series XL BPF's come standard with a 12 VDC cooling fan for high duty cycle applications such as RTTY Contesting. All 4O3A devices come standard with SO-239 (UHF) RF connectors.

N or 7/16 DIN connectors are available on special order request.


Amazes me! Now I can run 6 1500W stations transmitting at the same time with just one tower and on one acre!  I have a Force 12 240N (90’) on top of two stacked 11 element tribanders, a full size 80m vertical, an inverted L for 160m, and with no interference.  Saved tons of money, less towers, no interference, and will sleep better at night during hurricanes with 140 mph wind load rating of the one tower!” - Dan ,W4UH


I just bought the 4O3A Triplexer System and it is wonderful. I have operated it so far on SSB & RTTY in contests and it performed flawlessly. We’ll be putting it thru its pace in CQWW WPX CW next month. You will not be disappointed buying this system!” - Fred, WW4LL


For additional technical data on the Series XL bandpass filters, click Link: High Power Bandpass Filters - Series XL at the top of the page. 


Sample use of HF Triplexer System with 6x2 antenna switch.  Individual transceiver/amplifier stations per band could be connected direct to BPF inputs instead of using a switch in front of it. 



 Specifications, combiner:

 Input ports:  20m, 15m, 10m

 Input power per port:  4500W

 Insertion loss:  20m, 0.1 dB, 15m, 0.1 dB, 10m, 0.15 dB.

 Connectors: SO-239.  N or 7/16 DIN available on request.

 Dimensions:  HWD 4.72 x 4.72 x 21.65 inches (12x12x55 cm)

 Weight:  6.16 lb (2.8 kg)

 Cooling:  Fan, requires 12VDC power.

 Interport attenuation with XL BPF's connected: 

 20m input = 15m, min 87 dB.  10m, 120 dB.

 15m input = 20m, 104 dB.  10m, min 72 dB.

 10m input = 20m >120 dB, 15m, min 72 dB.

 RX IMD level, worst case 1600 watts per port: -10 dBm

 RX IMD level, worst case 3200 watts per port:  -7 dBm



4O3A Signature Series HF Triplexer System

Includes 20/15/10m combiner and individual series XL HP bandpass filters for 20/15/10m.  SO-239/UHF connectors.