[TG] [TG11] RV100

[Tom - Raymarine - Moderator]

Hello Ryan,

I would suggest not investing a huge amount of effort into working out how to eliminate interference until we know where it's coming from.

Re. transom/bracket vibration, a simple and temporary test might be to put a bit of rubber (e.g. car floor-mat material) between the bracket and transom and see whether that helps. As long as you use the same 65/15/0 you can easily see whether you do or do not have the same level of interference in a quick test run, without having to go all the way out to deep water or the reef. Always use that same setup for testing.

If it turns out that separating power supplies makes no improvement, and neither does damping transducer/transom vibration, then perhaps you are picking up electromagnetic interference (EMI) on the transducer cable. If that is the case then ferrite beads/chokes on transducer and power cables *may* help, but I won't pretend to be any kind of expert on these. There's some information on choosing ferrites at https://resources.altium.com/pcb-design-...-right-one, but as I say, I wouldn't bother with this until you know that you need to.

Regards,
Tom