73-54A-01 Series

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73-54A-01 Series

73-54A-01 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-01-2B-nn
  • 73-54A-01-2D-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-01 Series Systems (6.625" Cavity Diameter)

Tx-Tx Separation Cavity LossMaximum Power
1 MHz-1.5 dB150 W
250 kHz-1.5 dB150 W
175 kHz -1.5 dB150 W
125 kHz-2.0 dB135 W
100 kHz-2.5 dB115 W


Loss (dB) vs. No. of channels

Tx-Tx Separation 24812
1 MHz-2.6-2.7-3.0-3.3
250 kHz-2.9-3.4 -3.8 -4.1
175 kHz-3.1-3.9-4.5-4.9
125 kHz -3.6-4.4-4.9-5.3
100 kHz-4.1-4.5-5.4-5.8


Product Specifications 
Item No73-54A-01 Series
Item Name215-300 MHz, T-Pass Combiner, 6.625" Cavity
Frequency Range215-300 MHz
Cavity Type and DiameterQuarterwave, 6.625” (168 mm)
Maximum Continuous Transmit PowerSee Model Matrix
Isolator Load Pwr Continuous73-54A-01-2B-nn: 5 W/25 W
73-54A-01-2D-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 - Rack15 [Note 4]
Dimensions65.25" x 24" x 26.4" (H x W x D) [Note 6]
(1659 x 610 x 671 mm)
Weight - Basic Single Channel73-54A-01-2B-nn: 34 lbs. (17.2 kg)
73-54A-01-2D-nn: 35 lbs. (17.7 kg)
Weight - Expansion Channel Assy73-54A-01-2B-nn: 14 lbs. (7.2 kg)
73-54A-01-2D-nn: 15 lbs. (7.7 kg)