73-54A-05 Series

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73-54A-05 Series

73-54A-05 Series, 215-300 MHz, T-Pass® Combiners
Broadband architecture of the T-Pass® circuit and coaxial cavities mitigates equipment obsolescence and facilitates ease of system reconfiguration when re-banding is necessary. Each System configured for optimum performance. Ideal for applications with minimal guard band between transmit and receive frequencies.


  • 73-54A-05-2B-nn
  • 73-54A-05-2D-nn


  1. -nn in model number represents the number of channels.
  2. Consult factory on T-Pass multicouplers for frequencies below 215 or above 300 MHz.
  3. Models available with 5W/60W loads. Same specifications as 25W and 100W models, except load power.
  4. -MC option reduces maximum number of channels to ten 10-inch or twelve 6.625-inch channels per rack.
  5. -LR systems are tuned and tested on customer frequencies, then disassembled for shipping.
  6. Rack depth with cavity tuning rods at maximum frequency. Rod travel is approximately 3.9” (99 mm).


73-54A-05 Series Systems (10" Cavity Diameter)

Tx-Tx Separation Cavity LossMaximum Power
1 MHz-1.5 dB150 W
250 kHz-1.5 dB150 W
150 kHz-1.5 dB150 W
100 kHz-2.0 dB150 W
75 kHz-2.5 dB130 W


Loss (dB) vs. No. of channels

Tx-Tx Separation 24812
1 MHz-2.6-2.7-2.9-3.1
250 kHz-2.8-3.1-3.4-3.7
150 kHz-3.4-3.8-4.3-4.6
100 kHz-3.6-4.5-5.1-5.5
75 kHz-4.2-5.1-5.8-6.2


Product Specifications 
Item No73-54A-05 Series
Item Name215-300 MHz, T-Pass Combiner, 10" Cavity
Frequency Range215-300 MHz
Cavity Type and DiameterQuarterwave, 10” (254 mm)
Maximum Continuous Transmit PowerSee Chart
Isolator Load Pwr Continuous73-54A-05-2B-nn: 5 W/25 W
73-54A-05-2D-nn: 5 W/100 W
Min Tx-Tx Separation at Cavity Loss125 kHz @ -1.5 dB
75 kHz @ -2.5 dB
Typical Tx-Tx Isolation at Min Separation-70 dB
Typical Antenna - Tx Isolation-60 dB
Typical Tx Noise SuppressionDepends on cavity loss
Impedance Ω50
Maximum Input Return Loss - VSWR-20 dB (1.22:1)
Temperature Range-30 to +60 °C
Connectors - Input and AntennaN
MountingPeg Rack®
Mounting OptionsMC:19” rackmount adapter plates, 17.5” high
LR: System supplied without Peg Rack® [Notes 4,5]
Maximum Channels - Rack12 [Note 4]
Dimensions79.5" x 24" x 28.4" (H x W x D) [Note 6]
(2019 x 610 x 721 mm)
Weight - Basic Single Channel73-54A-05-2B-nn: 39 lbs. (19.9 kg)
73-54A-05-2D-nn: 40 lbs. (20.4 kg)
Weight - Expansion Channel Assy73-54A-05-2B-nn: 18 lbs. (9.5 kg)
73-54A-05-2D-nn: 19 lbs. (10 kg)