73-67-11 Series

Image of T-Pass 73-35A-01

73-67-11 Series

73-67-11 Series, 406-512 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.


  • 73-67-11-2B-nn
  • 73-67-11-2D-nn
  1. -nn in model number represents the number of channels.
  2. These specifications are applicable to 406-512 MHz models.
  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 5.1” (130 mm).


73-67-11 Series Systems (6.625" Cavity Diameter)

Tx-Tx Separation Cavity LossMaximum Power
1 MHz-1.5 dB150 W
250 kHz-1.5 dB150 W
150 kHz-2 dB 130 W
125 kHz-2.5 dB 110 W

Loss (dB) vs. No. of channels

Tx-Tx Separation 24812
1 MHz-2.4-2.6-2.9-3.1
250 kHz-2.9-3.8-4.4-4.7
150 kHz-3.6-4.8-5.6-6.0
125 kHz -4.1-5.2-6.0-6.4



Product Specifications 
Item No73-67-11 Series
Item Name406-512 MHz, T-Pass Combiner, 6.625” Cavity
Frequency Range406-512 MHz
Cavity Type and Diameter3/4-wave, 6.625” (168 mm)
Maximum Continuous Transmit Power3/4-wave, 6.625” (168 mm)
Isolator Load Pwr Continuous73-67-11-2B-nn: 5 W/25 W [Note 3]
73-67-11-2D-nn: 5 W/100 W
Min Tx-Tx Separation at Cavity Loss215 kHz @ -1.5 dB
115 kHz @ -2.5 dB
Typical Tx-Tx Isolation at Min Separation
Typical Antenna - Tx Isolation
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 36” (H x W x D) [Note 6]
(1659 x 610 x 914 mm)
Weight - Basic Single Channel73-67-11-2B-nn: 36 lbs. (16.3 kg)
73-67-11-2D-nn: 37 lbs. (16.7 kg)
Weight - Expansion Channel Assy73-67-11-2B-nn: 15 lbs. (6.8 kg)
73-67-11-2D-nn: 16 lbs. (7.2 kg)