Thierry wrote:

SNIP
Hi,

Correct. This is well what I did, rotating the amplifier load knob (a
kenwood TL922) to reduce the SWR as I could not reduce it another way
(antenna side) due to my defect balun.

73
Thierry

No! You did not reduce the VSWR!! You increased the loading of the
amplifier!

If you remember, VSWR is a measure of the impedance mismatch of the
antenna and the impedance of the transmission line MEASURED AT THE
ANTENNA. There is NOTHING you can do at the RTX/Amplifier to change it!

The PLATE and LOAD controls on your TL922 allow you vary the values of
'C' in the output stage of the amplifier and therefore vary the range of
tuning from typically 8 to 400 ohms.

DD, W1MCE