Last year, long before I had a Pluto, I purchased an unknown amplifier from Poland on Ebay, that was just marked "Mikom MLA 901-1459". Pictures of the front cover show a frequency range of 2439-2576 MHz.
In the meantime, I have made some measurements and made this amplifier a regular member of my amplification chain. Especially in combination with the new version of the SG-Lab V3 20Watt amplifier the MLA 901-1459 offers a useful tool to use the full power range of the Pluto to drive the SG-Lab PA to its full potential.
If you enter the "MLA 901-1459" in eBay ou can see that these surplus amplifiers are still available. It is a very well designed and built commercial little amplifier. Perhaps this is a good alternative to the little Chinese amplifiers that usually come without a housing.
Below are two amplification measurements, one with just the pre-amplifier (MLA 901-1495) and one with the entire system (Pre-Amplifier plus SG-Lab V3. Measurements were made with the SATSAGEN-Software and the Adalm-Pluto. Amplification of the MLA-preamplifier is around 25dB.
Holger 'Geri', DK8KW
P.S.: I am in no way connected to the seller of this surplus equipment, I just want to give some useful hint to people looking for such equipment.