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PRO-PHY85-4

4-Channel Hybrid Combiner for 85 MHz Transmitters
Description
  • Combining four transmitters or receivers on the same antenna.
  • Better utilization of good antenna position.
  • Four antennas on the same transmitter or receiver.
  • The only combining option with very small Tx-Tx frequency spacing.
  • 30 W load supplied (other loads or no load as option).
Specification
Electrical
Filter Type Hybrid Junction
Frequency 68 – 88 MHz (see table)
Max. Input Power 40 W per channel (max. 130 W with larger load)
(** see note)
Insertion Loss < 6.2 dB ±0.3 dB @ 4 MHz BW
< 6.3 dB ±0.3 dB @ 8 MHz BW
Impedance 50 Ω
Isolation Tx1 – Tx2 > 31 dB @ 4 MHz BW
> 29 dB @ 8 MHz BW
(* see note)
VSWR < 1.5:1 with all other ports terminated with 50 Ω
Load 30 W load fitted (other ratings available)
(** see note)
No. of channels 4
Environmental
Operating temperature range -30 °C to +60 °C
Mechanical
Connection(s) N(f) (other on request)
Historic Brand Amphenol Procom
Dimensions 420 x 89 (incl. conn.) x 42 mm (excl. loads)
/ 16.54 x 3.50 (incl. conn.) x 1.65 in. (excl. loads)
Weight Approx. 1.4 kg / 3.09 lb.
Ordering Codes
Model Product No. Frequency

PRO-PHY85-4-1

 210000783 68 – 73 MHz

PRO-PHY85-4-2

 210000784 72 – 77 MHz

PRO-PHY85-4-3

 210000627 76 – 81 MHz

PRO-PHY85-4-4

 210000567 80 – 85 MHz

PRO-PHY85-4-5

 210000568 84 – 88 MHz
Additional Information
Note

  * The isolation between the Tx ports is directly dependent on the load’s VSWR on the antenna port. With an antenna load VSWR = 1.5, the isolation between the two Tx ports will be reduced to 20 dB @5 MHz bandwidth.
** The load’s VSWR should be < 1.1! Each load should be able to dissipate 3/4 of the input power. E.g.: With 50 W input each load should be able to dissipate 50 W x 3/4 = 37 W.

Diagrams

TYPICAL RESPONSE CURVE

PROCOM A/S reserves the right to amend specifications without prior notice
PROCOM A/S • Smedetoften 12 DK 3600 Frederikssund • Denmark
Generated : 2026-06-27 Version 1