Bird Technologies 73-67-50 User Manual
TX RX Systems Brand
Compact Ceramic TX Combiners
73-67-50 Series
Bird®, TX RX Systems Brand UHF Ceramic TX Combiner combines up to 6 transmitters onto a single
antenna. With a footprint that’s more than 50% smaller than comparably performing 10” cavities. This
optimizes valuable space for your radio equipment, which in an era of escalating lease costs, makes it
the perfect solution for expansion. And because of our modular design, you can purchase in singlechannel increments. Plus, it delivers the kind of high performance and minimum interference you’ve
come to expect from Bird®.
PROBLEMS } SOLUTIONS
May need to minimize the number of antennas at a
communication site.
} Can combine up to six transmitters onto a single antenna
which eciently utilizes valuable rack and shelter space.
Need to maintain or minimize additional costs associated
with space in a radio shack / transmitter shelter.
} Our units provide valuable real estate in small shelters
where traditional T-Pass combiners are too large.
Need to minimize interference with competing communication
systems.
} System-level signal analysis (including interference mitigation)
for each customer application.
And may lack the time or expertise to integrate the solution into
the overall radio system.
} Oer complete solutions from system design through
individualized congurations, installation support, and
maintenance programs.
APPLICATIONS
Any communications system installation where you need
to reduce the number of antennas on a tower.
Any communications system designed to minimize tower
size and maximize site space.
Secured applications that require equipment under lock and
key.
Compact Ceramic TX Combiner
73-67-50 Series
SPECIFICATIONS
Frequency Range 450-512 MHz
Maximum Power per Cavity 110 W typical, 125 W max
Cavity Input Return Loss 20 dB typical, 18 dB min
Input / Output Connector N(F)
Operating Temperature -10°C to +55°C
Storage Temperature -40°C to +95°C
Size 5.82” x 5.82” x 17 (including tuning rod)
Selectivity (T-Pass Conguration)
Losses (dB)
TYPICAL 6 CHANNEL TRANSMIT COMBINER
Frequency Range 450-512 MHz
Insertion Loss
(150 kHz spacing)
Insertion Loss
(250 kHz spacing)
Insertion Loss
(500 kHz spacing)
Input VSWR 1.2:1 maximum
Average Input Power per
Channel (continuous duty)
Number of Cavities 6
Height (inches) 17” (9-10 rack units)
Depth (inches) 17”
Width (inches) 18”
19” Rack Mountable Yes
Weight (lbs) Approximately 100 lbs.
Input / Output Connector N(F)
Operating Temperature -10° C to +55° C
Storage Temperature 40° C to +95° C
Note: Model numbers will be determined based on frequency plan. Please consult factory.
3.7 dB typical, 5.3 dB max.
2.9 dB typical, 4.8 dB max.
2.4 dB typical, 4.3 dB max.
110W typical, 125 W max
Losses (dB)
Frequency MHz
System Loss
Frequency MHz
30303 Aurora Rd. Solon, OH 44139 866.695.4569 www.bird-technologies.com
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