🚀 go-pugleaf

In article <16B4D7795.D2KAK@VM1.CC.UAKRON.EDU> D2KAK@VM1.CC.UAKRON.EDU writes:
>In one of my planes it is necessary to use two Futaba coreless servos
>on a "Y" harness. The problem is that when the servos are connected
>and the radio turned on, the servos chatter like they're trying to
>find center all the time. 

>The radios are 7UAP 1024 PCMs.  ANY ADVISE, COMMENTS,
>SOLUTIONS?  I am considering buying a JR 10 Channel PCM. Do they have the
>same problem?     THANKS GROUP!!!!!
>

The "Y" harness might be acting like an antenna and causing interference
with the receiver.  I have had this problem and fixed it by running the base
of the "Y" cable through a ferite bead (one turn) to choke off the RF. This
worked with an airtronics receiver.  When I install servos in the wings of
my gliders I go ahead and put the ferrite bead in every installation and
have not had any problems since.

If your Futaba has a DSC cable (connects transmitter to receiver, for
running servos without the RF deck installed, neat feature found on JR X347
and other radios), then use it to determine if it is radio interference or
some other problem.  I am not familiar with coreless servos, and why they
may be more susceptible to noise.  Have you tried connecting any other
servos to this "Y" cable and see if the problem goes away?