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Old 03-03-2019, 07:51 AM   #19
ben2go
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City: Upstate,SC
Vessel Name: Shipoopi
Vessel Model: derilic sailboat
Join Date: May 2012
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Quote:
Originally Posted by gkesden View Post
Ensure your transducer is /never/ powered up when out of the water. At best, it'll do no good -- air doesnt carry the signal well enough for it to work at all. At worst, it'll damage it beyond use or repair.

Transducers are water cooled. Water has a specific heat capacity about 1000x more than air and a thermal conductivity about 25x greater than air. Even warm water cools much better than cooler air.

Some people may report that theirs was powered up on land and it hurt nothing. That might be true. And, it might offer you some reassurance should you goof. But, it shouldn't encourage you to do intentionally.

Whether and how much damage is done depends on many factors, e.g. how long it was powered up, model, power setting, age, etc. And, unless the damage is immediate total failure, it might be hard to assess and correlate back to the out-of-water event later on, e.g. premature aging, reduced sensitivity, frequency drift, power loss, timing variability, noise, etc.
What cools transducers that are mounted internally, to the hull?
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