[AMRadio] OF memory erasure

[Randy Berry]

I've always known it as U = Units for me. But I'm a young JN.

On Fri, Mar 29, 2019 at 1:12 PM CL in NC via AMRadio
<amradio at mailman.qth.net> wrote:
>
> Nick, thanks for that information.  Perhaps the military and the govt. used the lettering for panel ID.  I find this interesting, quoting Wikipedia:
>
>  "The EIA standard was revised again in 1992 to comply with the 1988 public law 100-418, setting the standard U as 15.9 mm (0.626 in) + 15.9 mm (0.626 in) + 12.7 mm (0.500 in), making each "U" 44.50 millimetres (1.752 in)."
>
> Guessing like standardizing a unit of frequency in cycles per second when we switched from the apparently arbitrary to most 'Megacycle' which could reference a time interval other than one second, to 'Megahertz', capitulating to Mr. Hertz, we now have also found it necessary to use another German reference the 'U' and make a public law from it.  Amazing how we got anything accomplished before that.
>
> Charlie, W4MEC in NC
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-- 
tnx es 73 de Randy, N3LRX/8
https://n3lrx.com