NOS4A2
There is a 50W PA that I just purchased and took delivery on from EBay that accepts 0dBm (1mW) and provides +47dBm (50W) of power output. Here is the link to that PA:
The LimeSDR outputs +10dBm (10mW) so you’ll have to attenuate the output of the LimeSDR to obtain the 0dBm input requirement to the 50W PA, but that’s easily fixed with a small SMA attenuator like this:
That’s how I’m going about getting the LimeSDR up to power. All this also considers that you have a Low Pass Filter at the output of the PA very much like the TAPR LPF that will eliminate any transmitted harmonics from going over the air because of any non-linearities of the PA to the feedline and antenna.
Also, this assumes that you’ll be running the LimeSDR in the HF band. If you’ll be running the LimeSDR in the VHF, UHF or SHF band, there are comparable RF amplifiers out there for those services that you can find reasonably cheap, too.
73 de Marty, KN0CK