I love my remote controlled ATU for the Doublet 2x27m with ladderline.
But I was thinking about the day when it would be in need of repair.
With my experiences with the remote controlled Z-Match and all the
good words about the S-Match by PA0FRI it was time to test that out!
I used a variometer inductor and a large variable capacitor plus a
doorknop capacitor. To turn the axes I borrowed the two servo motors
from the Z-Match. Some new code for the controller and the whole
S-Match Tuner was ready to work for me.