On your board, yes. An amplifier is installed behind the matching transformers.
There are no amplifiers on the Geran board. Only transformers and feeder.
An amplifier is not needed to receive a GNSS signal. Four channels are used for spoofing suppression. And it requires special firmware.
Geran contains a cropped simple GPS antenna, which indicates a modification.
Only one channel is used for transmission. This is clearly seen in the photo of the wreckage. And it's not connected anywhere.
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More interesting is that it contains some Russian components.
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In the pict you posted TX2 is used, and it can't be seen if it's connected somewhere or not.
It has no sense that board/box without tx use, I think you dont identify what is a PA.
PA is a tiny IC. It's not a big component.
And I like said before, you dont need FPGA and SDR components to implement only a GNSS receiver, it's a lot cheaper use a hardware designed for that.