Total posts : 45366
Because elephants leave a lot of it 🙂
The easy answer is that there has never been issued an NOUO for “going over 200 feet.” Notices are issued for either field strength (usually ridiculously beyond the guidelines) or violating the three meter rule (antenna and ground lead – again, usually for a ridiculously long ground lead).
If you read a good number of NOUOs you’ll start to see a pattern – 100,000 uV/meter at 25 meters is not “just slipping over the line,” a 50 foot ground lead is not a “good faith mistake” when siting a transmitter.
In fact, if you read the last few years’ NOUOs you’ll see that none of the topics folks usually sweat on these forums (capacitive hat, center loading, 1 mW vs 10 mW, etc.) ever make the enforcement lists. It’s the poor souls who buy a 10 watt AM or FM unit off of ebay or run a 50 foot “ground wire” to an AM transmitter (and only two of those) – or sellers of devices not certified, who get a letter.
Again, in my opinion, I think the only reason the “200 foot” notation was added was to offer some real world description of the user experience for non-technical users when sellers were making outrageous range claims. Toy walkie talkies, cordless phones and baby monitors are Part 15 devices, too and back in the 80s and early 90s companies used to claim “1000 foot range” and such, which was pretty much impossible.