They ( in line rf amps) are commonly used in mines. They are
bi-directional amps. Those I am familiar with split the vhf band in
half... one half goes each way with filters to allow bi-directional
duplex.. Mine Site Technology is one vendor The whole system
operates under 5 watts... I
I don't think I've ever seen an amplifier along a leaky coax system.
Since the holes in the coax are 2-way, the downstream amp would also
amplify anything that leaked INTO the coax before it. That would
cause lots of interference as well as oscillation from the output of
the amp to the input.
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