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It looks just like an antenna that I used to see on homes back in the early 70's. It is a lame half-wave design, no different electrically than the old Radio Shack half-wave ground plane with the little loops on the top (remember those?) and no better performance than your A99. The half-wave...

It is impossible to tell people that any watt meter is worthless unless you are operating it into a known quality dummy load. Otherwise any reading is purely relative (that means a rough estimate). Even operating a precision directional watt meter into an antenna (regardless of its match) will...

The amp has an input impedance problem or is oscillating. Using various lengths of coax is simply using coax as a conjugate matcher but does not solve the root problem. You need to find the root cause of the problem. But unless you are good at working on amps (more than turning screws or...