I got two. Put one on a DC40 that had broken off. Put the other on a DC30, but did a test before replacement. The replacement improved both the line of sight distance and over-the-hill distance. Should have done it a lot sooner.
Product Rating: 5 out of 5-stars. Review ID: 8993 Reviewed: 2014-03-11
These antenna's are great. Far better reception than the stock ones. Antenna is very flexible, unlike other aftermarket antennas which I have tried. Only problem is that I have had is one of the end pieces came off. Did not affect the range or function in any way. Great replacement antennas. Best ones I have found.
Product Rating: 5 out of 5-stars. Review ID: 10222 Reviewed: 2014-04-26
Black Supra-Tuff DC-40 / DC-30 Replacement VHF Antenna
Aftermarket heavy-duty replacement whip antenna fits both Garmin DC30 and DC40 GPS tracking collars. The Supra Tuff is tougher than the factory original and gives you longer range and better communication. Approx. 21" long.
To Remove your old VHF antenna:
Use a small Phillips screwdriver to remove the two mounting-plate screws and the mounting plate from the collar.
Remove the collar strap.
Remove the rubber cover from the VHF antenna-connector screw.
Remove the VHF antenna-connector screw.
To attach your new VHF antenna to the collar:
Attach the VHF antenna connector to the DC 40 with the VHF antenna-connector screw.
Place the rubber cover over the VHF antenna-connector screw.
Replace the collar strap.
Connect the DC 40 to the collar using the mounting plate and the two mounting-plate screws.