how to identify existing transducer

[Anonymous]

Hello, I just bought a used Grady. For electronics it has a GP-1650DF with a hard to read screen. I was thinking of upgrading to the GP1870F but want to make sure my existing through hull is up to the task. I believe it is a 525T-BSD. It is a bronze through with a 10 pin connector, NO wheel.

How can I tell for sure? Thanks, Rich.

 

[Snips]

theclam20,
By your pictures you are probably correct. The current model number is 525TID-BHD which is a B-258. A couple ways to tell is that a B-258 measures 7" tip to tip, a B-260 is 8.5". Also the shape on a B-258 is symmetrical and the B-260 isn't. While the transducer will work for regular fish finding it is not in the GP-1870 database for Bottom Discrimination.

Snips