A recent upgrade to more powerful com radios has introduced a bit of an
undesirable problem with the Trutrak autopilot. When the auto pilot is
engaged and the #2 radio is keyed, serious pitch oscillations occur.
While the Trutrak installation materials discuss its relative immunity to
RF, it does suggest shielding the lines to the control wheel steering
switch. if interference is encountered. The radio upgrade included
switching from RG58 to RG142, so the overall shielding is improved, however,
the antenna for the #2 radio is much closer to the autopilot wiring and
hardware than the #1 antenna. The interference appears to be
be coming directly off the comm antenna and not from any
'leaks' on the way there.
Are there any tried and true fixes for making the Trutrak
immune to RF? I really didn't want to re-invent the wheel on this
one.
Chris Zavatson
N91CZ
L360std