Join Date: Apr 2006
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If it is RFI, that may be impossible. If it is powerline noise, an inexpensive noise filter from a car stereo shop, or an "alternator noise filter", applied to the power leads to the fridge may stop it.
If you can grab a second battery to power the VHF, so it is completely isolated from the common power source to the fridge, and isolating it stops the noise, a noise filter will do the job. If there's still noise with a second power supply...RFI is harder to stop.