[TG] [TG11] RD418HD 4Kw Color Radome not working

[Tom - Raymarine - Moderator]

Hello richardr54,

Our apologies for the delay in replying due to the current unusual circumstances. I am guessing that you already have an answer to your question or have left the boat in Grenada, but in case this is not the case: to me, this really sounds like restricted power supply. I know that have done a check on the voltage but I am guessing this was perhaps on the end of the radar's cable when unplugged from the radar, and would then have been an un-loaded voltage.

This is exactly the kind of symptom you would see if the cable gauge supplying the radar were insufficient or there were a loose or high-resistance connection somewhere in-line. The radar draws less current as it is starting up, but during the start-up process as more systems within the radar are enabled its current draw increases, which pulls down the supply voltage. If the voltage dips low enough, the process browns-out and you get a no-radar message.

Regards,
Tom