Has anybody seen this?

I have been a long time proponent of cable tuning, in the case of repeaters you can tune them for peak SNR , the cables between the cavities are just as important, As in when setting up master receive and transmit systems.
We would use a RF sweep generator and a Specturm analizer, and a Sinader coupled to the receiver.

 

You two know what the application is and how it matters when in hf it doesn't?

 

Nothing here makes sense so let me come to confuse a bit more. Low frequencies travel longer distances

 

I thought you knew how rf works?

It matters what frequency they are operating, the formulas are a clue. They are in the uhf/microwave region and as powder hinted at when he did work repeaters, cable lengths mattered.

Microwaves behave different than hf/my, especially in regards of noise and feedlines.

Many of these things don't matter when it comes to lower frequencies like hf.

By the way, spin noise is discussed in nuke research, I think it was discovered back in the 80's in Germany or Austria.