Model Forum / Radio Controlled / Water Models / February 2007

The Hitec HS-765HB Sail Servo is recommended for the Fairwind 900 model
yacht but has only 90 degrees of rotation - see
http://fairwind900.home.comcast.net/Chris/Bakersfield%20Fairwind%20for%20Racing.pdf.
Adding two 2.2 k ohm resistors (red, red, red) to the red and green
potentiometer leads will give almost 180 degrees of rotation. To avoid
dismantling the servo and risking damage a servo stretcher can be
purchased or made on veroboard which connects between the receiver and
servo and has the same effect. These are rather expensive and I
couldn't find the circuit so I chose the dismantling option - see
www.servomod.20m.com.

First apply electrical tape to both sides of the top half of the servo
to hold the gear mechanism together when the screws are removed. The
motor is held in place by a blob of glue. Heat may have to be applied
with a soldering iron to the motor contacts to soften the glue if the
board cannot be removed by force. The potentiometer is held together by
a screw and three lugs which have to be carefully bent upwards. Ensure
that it is replaced in the same position. Both ends of the red and
green wires are glued which makes removal difficult so I cut them in
the middle and soldered in the resistors. I covered the joints in heat
shrink and carefully flamed them although electrical tape would have
been easier and just as effective.

So why can't Hitec make this alteration and put a switch on the side
for both options?