I’m upgrading the sonar on my boat.
Got everything hooked up, and looking at the voltage displayed on the depthfinders I got a little perturbed. I was showing over 2 volts lower at the bow than directly off the battery post. But before I started pulling bigger wire, I decided to actually check with a meter. Borrowed a nice fluke dvm, and checking at the pins in the depthfinder plug, I’m only down .2 volt from battery to bow unit. It’s a 22 foot boat, and the way it’s laid out, I’ve got about a 30 foot wire run.
Battery at stern, up to center console, then back to stern, then up the gunnel to the front. No good path to fish wire through directly from center console to bow. But my question,
2 tenths of a volt drop is within reason, yes? And are the voltages shown on the units possibly that far off from reality? New H’bird helixes.
Thank you.


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