wireless fish finder frequency question 433 mHz and 433.9 mHz? Is there much difference?

MR. ED asked:


I have a wireless fish finder sonar that operates at wireless frequency of 433 mHz. Well the sonar was damaged. I found a replacement but the replacement operates at 433.9 mHz. Now i don't know anything about mHz. I wanted to know if i buy the sonar that operates at 433mHz will it work with my receiver which operaes at 433.9 mHz. Thanks to anyone who can answer this question.

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One Response to “wireless fish finder frequency question 433 mHz and 433.9 mHz? Is there much difference?”

  1. GibsonEssGee says:

    Without reading the tech specs it’s difficult to make a judgement. A lot of fish finder vendors specify 433.9MHz for their kit and that frequency is authorized by the FCC for all sorts of purposes such as fish finders, keyless fobs etc. Check the sonar technical specification in the new sonar’s manual or on their website but I’d bet my house on the fact it’ll be 433.9MHz .

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