Received an e-mail from E38 Survey Solutions, a reseller of Emlid gear.
They are offering a Long Range External UHF 450 MHz Radio Kit for use with Emlid Reach RS2+ and Emlid Reach R3. Seems like it should also work with the RS2 receiver as well I would think. I know in the past there has been questions regarding external radios for use with the Emlid receivers.
This Kit includes:
External UHF Radio and High Gain Antenna
Communication Cable for Reach RS2+ or Reach RS3
Power cable with alligator clips.
Pole tripod and telescoping pole.
450 MHz radios require a radio license in the US
With this external radio kit you can send a powerful 35W transmit power UHF signal out for your Reach RS3 or other compatible rover using TrimTalk protocol.
Much obliged for the post. I contacted them asking if it works with the RS2. I will update here if I receive a reply.
Got my response from them super fast:
"You can connect it to an RS2. The RS2 can’t receive the corrections coming from the radio though. You would need to add an 450 MHz external radio on the RS2 in order to receive those corretions.
The RS3 has a built in 450 MHz receive radio. So, you could run the RS2 with external radio as your base, and just the RS3 as a rover."
Seems like an easy way to make an older RS2 provide corrections over Trimtalk to your current non-Emlid antenna in the 400 range. Easier to just buy all Emlid if starting from scratch, but I know some people are mixing and matching like me.