Amazon.com: UpBright New GPS Antenna Compatible with Topcon GPS GR-3 GR-5 GLONASS Rover Base Hiper Lite +,Surveying, RTK (Note: Please Check The Image Connector. Please Check for Compatibility with Your Unit.) :
Topcon MC-R3 GPS 3D-MC2 Single Antenna MC-R3 GPS UHF II Receiver G3 – Advanced Tool & Equipment
GPS CABLE, TOPCON GB-500 TO ANTENNA TNC
Topcon PG-A1 GNSS GPS/GLONASS Antenna | Precision Geosystems, Inc.
TNC Male to TNC Male RG58 RTK Survey GPS Antenna Extension Cable for Trimble Topcon Leica Sokkia GNSS RTK Survey Vehicle Marine _ - AliExpress Mobile
41300-3.5L - GPS Antenna Cable, Trimble, Ashtech, Topcon. - 12 ft. - Western States Cabling, Inc.