[AMRadio] Question for the very OT's

CL in NC mjcal77 at yahoo.com
Thu Mar 20 16:17:07 EDT 2014

Have not been able to find an answer to this, maybe someone knows here.  When did civil aviation move off HF and on to VHF?  I'm currently looking at a couple antique low power aircraft radios that are obviously HF and convertible to 75 meters.

Charlie, W4MEC in NC

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