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Dual 100 W Circulator Isolator 450--476 MHz minimum 50 dB isolation without load, US $830 – Picture 0
Dual 100 W Circulator Isolator 450--476 MHz minimum 50 dB isolation without load, US $830 – Picture 0

Dual 100 W Circulator Isolator 450--476 Mhz Minimum 50 Db Isolation Without Load

US $830

  • Newport Beach, California, United States
  • Jun 9th
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Allgon brand (Swedish) Dual 100 watt Circulator Isolator 450--476 MHz minimum 50 dB isolation.  These were removed from working systems and each unit is tested and warranted to meet specification.  Typical through loss is 0.5 to 0.6 dB and depending upon frequency, has 50 to 70 dB isolation. These were originally made to operate from 460 - 468 MHz. However, since these are broadband, they will easily cover 450 to 476 MHz. If you need coverage into the 440-450 ham band, these will provide a minimum of 40 dB isolation.  For proper operation, a 50 ohm load must be attached to the unit, otherwise any reflected power will be returned to the small 15 watt internal load on the first stage. If you also need a 50 Ohm load for the output side, we have other listings for loads from 15 watts to 250 watts that are compatible with this circulator. The first circulator has a built-in load and only the output stage requires a load. Unless you are operating in continuous transmit mode, you will probable not require a load of the same power as your transmitter. For example, for normal intermittent use of a 50 watt repeater, a 25 or 30 watt load is usually sufficient. These units also have directional couplers built-in to measure forward and reflected power and use SMA connectors. These do not need to be terminated. Specifications are not available for the couplers.  Typical weight is 1.2 lbs each. Each unit has been painted, and may have a few scratches due to handling. These are not as pretty as the other listing, but are just as good. Questions, call Fred at 949 - 640 - 8899 Pacific time.

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