"Jack Painter" wrote in message
news:SR2tc.76990$pJ1.75446@lakeread02...

1. RF feedline from ATU to antenna.

This should be coaxial cable with dialectric and shielding designed for
RF.

Imagine what 2 meters of coax with a capacity of 200pF ( a "load" of about
200 ohms at 4 MHz) does to a high impedance (several kOhms at 4MHz) antenna
connection: right... almost short circuit it to ground.
NEVER use coax between the ATU and the antenna.

Never improvise with something such as spark plug wires.
GTO15 is not sparkplug wire.

2.(a) Grounding: RF

This does not have to be wide surface area copper,

The ground connection has to be as low impedant as possible. Copper strip
has a lower impedance than copper wire with the same cross-section.

Meindert