Jeff,
I'm using the same setup Icom/Archer. My coax runs through a 1" x 2"
channel in the left of the fuse, along with the transponder coax, left
wing wiring and a couple of other power wires. You've ridden in the
bird and, as you probably know, there is no interference, at all. The
only time I had a probelm, was with the mic going to open and affecting
the trim, tripping the breaker. That turned out to be a short in
intercom wiring. Once it was fixed, the problem went away. I'd check
all other connections, including grounds, just to be sure they are all
good. Other than that, I'm stumpped, but that's not hard to do... :)
I know you're close to first flight. Keep us apprised. Hope to see you
at Sun-N-Fun...
Jeff - N55XS
141 hours
JEFF ROBERTS wrote:
>
> HI All,
> I remember this was discussed before, but to know resolution as I
> recall. I Have been fighting an RF problem with my I-Com radio. The RF
> is obviously getting into the ground as even the trim LED's are
> effected. I have a Stratomaster engine monitor from MGL that seams to
> work great until I hit the push to talk button. It then goes black and
> the trim and Navaid LED's go crazy as well. I have a Bob Archer antenna
> in the tail and the radio sounds clear and transmits well. When tested
> with any other antenna the same thing occurs. The power to the antenna
> is about 7 watts and there was only about a half a watt or less coming
> back on the shield when tested. I made sure some time ago that the com
> RG cable to the antenna was isolated from any other cables. We have
> checked, and all grounds are good on the radio. I have been told to
> install some ferrite RF suppressors on the ground and output of the
> transmitter and to place them on the ground and power going into the
> engine monitor. Before I order these have others run into this and have
> you determined the cause and solution? Any Ideas are very welcome as I
> have been scratching my head for a week!
>
> Thanks in advance,
> Jeff Roberts
> A258 - N128LJ
> Waiting inspection 1st week in March.
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