[BC] Outside source for checking Modulation Levels

[Harold Hallikainen]

> Harold
>
> My 50 year old rules show nothing about peak duration for the flasher. Did
> it get added and then later removed or was this some official opinion that
> never was actually in part 73?

Only took me a couple hours to find! It wasn't in my 1956 rules, since
stereo had not been authorized yet. It was in the 1980 rules. See
http://ming.hallikainen.org/tmp/scan.pdf .

It's part of the requirements for stereo monitors. It's 73.332(d)(4).

For a while, I thought I'd imagined it...

Harold

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