The following applies to the models listed below. Read further for other models. 


  • MR HH300
  • MR HH325
  • MR HH400
  • MR HH415
  • MR HH425


The antenna connector on your radio is a type “SMA female”. External antennas typically have a UHF connector, type PL259. This is the adapter you will need: SMA male to SO239

One end of the adapter should have an SMA male, which will attach to the radio. The other end of the adapter should have an SO239, which will mate to the PL259 on the antenna cable.

 

You could get a simple adapter like this:



The above adapter will work, but it will place considerable strain on the antenna connector on the radio. It is recommended instead to get this type of adapter cable:



The above adapter cable will provide a more reliable antenna connection. It can be obtained from internet retailers. Try searching for “SMA male to SO239 cable”.



The following applies to these models:

 

  • MR HH350
  • MR HH450
  • MR HH500
  • MR HH600


The antenna connector on your radio is a type “SMA male”. External antennas typically have a UHF connector, type PL259. This is the adapter you will need: SMA female to SO239

One end of the adapter should have an SMA female, which will attach to the radio. The other end of the adapter should have an SO239, which will mate to the PL259 on the antenna cable.

 

You could get a simple adapter like this:



The above adapter will work, but it will place considerable strain on the antenna connector on the radio. It is recommended instead to get this type of adapter cable:



The above adapter cable will provide a more reliable antenna connection. It can be obtained from internet retailers. Try searching for “SMA female to SO239 cable”.