<html><head></head><body><div class="yahoo-style-wrap" style="font-family:times new roman, new york, times, serif;font-size:16px;"><div dir="ltr" data-setdir="false">Hey folks,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">My OTS STX-101 receiver is picking up some fairly significant and annoying electronic noise from my Roboteq PWM motor controllers. I tried changing channels on the OTS hoping a different frequency might help but it didn't. I also tried changing the controller PWM frequency between a range of 10khz and 24khz but nothing between those frequencies made a significant improvement. The noise is enough to override the normal squelch setting but at the same time a strong communication signal through the OTS transducer is enough to override the noise.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">My configuration has the transducer outside the hull and receiver inside the hull which required cutting the cable. I potted the cable in a thru-hull and reconnected the cable inside the cabin with RG-58 SMA connectors (soldered, not crimped).</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">In talking with a couple other folks it seems I am not alone in this experience. Some others have found that using local batteries instead of tying into the same batteries used by the motors has significantly reduced the noise, however in my case I am already using a separate battery isolated from the motor batteries. Another choice that has seemed to make a difference is mounting an SB-1001 outside the hull and running the headset wires through the hull instead.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Anyone else have similar experiences with OTS?</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Jon</div><div dir="ltr" data-setdir="false"><br></div></div></body></html>