Something is seriously defective with the last two FMA Fortresses I've
picked up.

I got one yesterday, and out of the box channels 5 and 6 (flaps/Stylus)
were very jittery with lots of noise.  So I returned and the kid behind the
counter said they'd just have to send it back to FMA on my time and dime!!!!
One day old, receipts, never been flown!!

Fortunately I knew the manager from many purchases, and he just
exchanged it for a brand new one out of the box.  Slit the plastic, took
it out the new one and handed it to me.

I took it home, and hooked up my set of brand new Hi-tech servos in
various combinations, careful of polarity.   And wouldn't you know it,
the receiver was botched!   Channel 1-5 work fine, 6 and 7 jjust don't
respond and the servos have a low hum-like vibration and don't move,
and get hot on those channels!

Doesn't matter which servo I try.... they work on 1-5 and don't on 6-7.
I think hooked up long enough this receiver would fry the servos.  Unlike
the other one, this receiver isn't sensitive to small amounts of finger
pressure though.  The QA on these receivers must not be too good!

Two brand new botched receivers in a  row is too much for me.  Further it
will cause me a lot of driving and embarrassment as I lay my credibility
on the line for FMA.   I have a feeling they're going to give me a hard time
at the hobby shop and not going to believe me.  I'll let you know how the
hobby shop and FMA treats me over this.

I'm using new servos, freshly charged 4.8 V pack, new receiver, new
XTAL, and all polarities correct from the beginning, not even in a glider.
This is in preparation for a Bird of Prey.

I'm going to be very skeptical henceforth with new FMA receivers, even
though I still have one and am using one I bought two years ago.

Its not worth the hassle, I'm very sorry to say.

-Paul

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