So you’ve sprung a leak? I thought proper grounding
of the antenna would prevent stuff like this.
Try putting some soap and water around the antenna, look for
bubbles…
You can then patch the leak with some copper foil ;)
Kevin
From: Lancair Mailing
List [mailto:lml@lancaironline.net] On Behalf
Of Chris Zavatson
Sent: 2009-03-03 14:38
To: lml@lancaironline.net
Subject: [LML] TruTrak autopliot
and RF
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.