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I have a Ray-Nav 570 Loran that suddenly stopped receiving signals. I suspect my antenna isn't functioning normally and have learned from Raymarine that the antenna couplers are no longer available. They did tell me that if I can find one, either Raytheon or Apelco couplers will work. Any chance any of The bretheren have one laying in a garage after upgrading to GPS? Walter

Walter,

are you talking about the antennas themselves or the plugs that go into the units? I have a few 398 units and some antennas laying around somewhere. They are old and may need battery replacement, however, I may be in the same boat as you.

i don`t want to sound like i have everything but i have a micrologic ml-8000 consider the best unit made buy many a montauk captain.just a stripe bass trip to the elbow!

Harv- The coupler is the piece the whip screws into and the coax cable comes out if. They don't seem to be universal so each manufacturers coupler is somewhat different. Walter