I posted this to the inflatable boat section
new vhf setup
Made a waterproof enclosure for my VHF. Inside is a gel battery and a 12v to 5v step down transformer to power the 5v GPS mouse and also give a USB charge point on the box.
However, I'm getting some interference. What I receive and what I transmit is being muted for a split second at a regular interval of approx. 2 seconds. Someone on this forum suggested the fault might lie with the 12v to 5v 'buck' converter that powers the GPS, so I disconnected it and connected the GPS to a 5v battery source instead. The interference has gone. So I'm looking for a 12v to 5v step down that won't introduce this interference. Any ideas? Apparently virtually all 'buck' converters are notorious for noise.