I have to make a decision..I would appreciate any input you care to share. I talked with Garmin tech(Josh) for a long time while on the water yesterday. His final word was either take my PS-21 back to where I bought it and purchase a PS-31 or they might consider sending a PS-21 replacement.
I totally isolated my PS-21 by using an independent battery for the power cable & had the transducer cable laying on the deck not close to "any" wires. I still have the screen clutter. I also had 2 ferrite(sp) chokes on both the power & transducer cables. For those that don't know, my PS-21 & PS-30 are on a transducer stick..The 2 videos are with the TM "not running"
Totally happy with the PS-30