What you need is called an RF modulator. It takes the HDMI Video signal and modulates it to a standard TV channel 3 or 4 signal. Then you would have to inject that signal to the "cable input" coax of your RV which would then get it to the TVs on channel 3 or 4 (whichever it was modulated to). Your resolution will probably only be 240P because we are talking about 70's technology here.
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Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad - Selling
2020 Chevy Colorado Z71 Trail Runner Toad
2024 Chevrolet Trax 2RS - Soon 2B TOAD
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