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