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Post by End80 on Nov 8, 2020 0:12:28 GMT
I don't know when NOUOs began being issued, but upon looking over the AM citations of just the last twenty year's.. two curious things are evident.
Remember back when KENC got his first NOUO and everyone was up in arms because he was cited for field strengths only but no mention of the alternative option?... Well here's the curiosity I never noticed before.. Every NOUO issued before the KENC fiascos cited ONLY field strengths.. For example'...
The only exception to this licensing requirement is for
certain transmitters using or operating at a power level or mode
of operation that complies with the standards established in Part
15 of the Commission's rules, 47 C.F.R. §§ 15.1 et seq. ...Thus, this station is
operating in violation of 47 U.S.C. § 301.i
No mentions of alternative rules or ground leads in any citations prior to KENC but in every one since. Don't you think that interesting?
Another interesting fact is there has only been one NOUO in about seven years.. That's unheard of!! I suspect its due to licensed AM station owners don't give a crap about their signals anymore since they've now have FM repeater's, so there's no complaints..
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Post by mark on Nov 8, 2020 3:06:00 GMT
I don't know about the KENC situation so I can't comment.
The real advantage of part 15 AM is not having the field strength limit.
The alternative of 100mW into final and antenna length limit but no field strength has been in the books for a long time as the filiment in tubes is mentioned. Maybe in the report of the NOUO's it's not disclosed as to every part of the conversation that went on between the agent and the person. Could be they were breaking one rule and that's what gets published. I understand what you are saying...strange that both rules aren't stated in the NOUO.
Some of the reasons AM gets not to many citations is....interference and many stations coming in on top of each other with skywave is expected and normal. No one will complain about that.
Not as many people care about AM and most "pirates" choose FM not AM but I don't know where they find space as in the eastern part of the country the band is full especially with the translators. They have to be interfering with other stations and radios near them with those higher powered Chinese transmitters so they get nailed. Also the aircraft band is right next to the FM broadcast band and they are analog so it's enforced much more.
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Post by Admin on Nov 8, 2020 14:45:28 GMT
Most likely the NOUO's don't mention 15.219 because the reported excessive field strength can be linked to the antenna system which includes the grounding of the system.
If they can show the antenna system is non-compliance due to grounding, 15.219 does not apply. The fall-back is 15.209 whereby field strength takes priority.
For that reason, 15.219 doesn't come into the equation.
And besides, even a 100% legal operation could be interfering and subsequently shut down. So if your station isn't causing interference, it most likely goes unnoticed until it angers someone.
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Post by End80 on Nov 9, 2020 19:38:48 GMT
What I'm pointing out is change of inspection methods.
From 2002 through 2008 there were about a dozen AM NOUOs, ..none of which mention 15.209 nor 15.219. They all use the same template in stating that the measured field strength did not conform... "with the standards established in Part 15 of the Commission's rules, 47 C.F.R. SS 15.1 et seq. "
Then in 2009 , begng wth the KENC NOUO, their template changerd and NOUO began specifying 15.209 15.219 and ground lead and so forth. Now its standard NOUO procedure.
It was KENC's insistence to the agent that the field strength did not apply which resulted in a new content in all NOUOs
NOUO Notices of Unlicensed Operation
A Look Back at KENC 1620 AM
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Post by End80 on Nov 9, 2020 23:01:01 GMT
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Post by mark on Nov 9, 2020 23:04:00 GMT
End 80 said...."It was KENC's insistence to the agent that the field strength did not apply which resulted in a new content in all NOUOs "
Makes sense. Sometimes the agents don't know their stuff as Decade here in Canada once told me and he had experience with some agents trying to tell him you can't do this when you can.
Good for KENC in getting change with an uninformed agent. Seems to me that contrary to my other post that you have a choice between field strength and the 100mW with antenna and ground lead length. 15.209 or 15.219.
I'm in Canada and have all rules pertaining to my operation....rules/certification etc. printed from the website text in a safe place to show anyone in the off chance I ever got a visit by Industry Canada.
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Post by thelegacy on Nov 21, 2020 4:04:58 GMT
Here is the thing between am broadcasting and FM broadcasting for hobby unlicensed use. There are those that are going to argue about this but I'll say it anyways AM radio is a dying breed the digital am known as MA3 is the last ditch effort to try to save the medium Wave band for commercial broadcasting. If this particular mode has the same death that AM stereo did I surmise that the AM radio band will be nothing but a hobby Broadcasting band for experimenters to do what they will so long as they don't cause interference.
Fact number two at the Michigan School for the blind we had a high-profiled AM radio station that was unlicensed and I can already tell you it was more than 100 milliwatts. One day I asked the teacher how many watts the transmitter put out and he told me it was between one and five Watts. Not milliwatts now but between one and five Watts. The signal was booming when I say booming I mean full quieting up to about 3 Miles. This was in the '70s long before the am band was even starting to die out.
I even know personally of a case whereas the FCC inspected a particular am hobby station and they were running more than 100 milliwatts their antenna was not the conventional vertical shaped antenna it had a weird shape to it that's all I'll tell you the agents looked at it the transmitter was clean and they walked away and the individual operating the station which clearly had an antenna longer than 10 ft and the power level greater than 100 milliwatts never got any sort of letter or told to shut down. The transmitter was very pure spectorally probably more pure than a talking house that is for sure.
This is just for educational purposes only but the person in question to whom I knew very well knew his stuff inside and out when it came to radio and practiced super clean engineering practices. Part 15 AM hobby broadcasting always seem to have a margin or fudge factor to it reason for so is the experimentation with different antenna designs has always been encouraged whereas FM as was said many times is too easily an animal that can get out of control because of the placement of the broadcast band on FM and the fact it is less forgiving than amplitude modulation.
However you can bet your bottom dollar if you interfere with 160 m ham radio or anything near any of the amateur radio bands you will most likely get a complaint. This is why I believe the FCC encourages hobby broadcasters to use the am broadcast band for their hobby rather than FM. If you ever get visited by an agent they will highly encourage you to use AM.
So be sensible on the AM radio band don't do anything foolish watch your content and you should be okay it's when you do something extremely greedy is where you might have some problems.
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Post by mark on Nov 22, 2020 18:46:18 GMT
I think based on your situation as an example what goes on between the person and the agent has a lot to do with the outcome.
Your attitude with the agents means a lot towards what happens.
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Post by thelegacy on Nov 27, 2020 20:54:57 GMT
Usually as the agent told me when they have to go all the way to your house on a 3-hour trip it's usually more than just going over the field strength limit it's because you're causing some kind of a problem and someone complained about it. That's what happened in my case I also found out that with that Chinese transmitter it was wiping everything all the way up to 700 MHz the AT&t cell tower which was not that far away from the Deltaville Market in fact it was on the opposite side of Deltaville Market was getting wiped out by my cheap trashy Chinese transmitter. at the time I didn't have AT&t so I didn't know about it but it wiped out everybody in Deltaville well they could not make any phone calls or receive any.
My agent told me that after I was concerned about what actually was going on now I understand why the FM transmitter sold in China are so bad.
And I know it has to be true because there hasn't been any more disturbances on the AT&t cellular network and I even have an AT&t phone so I know exactly what will happen. I might run my BroadcastVision sporadically but that does not interfere with the AT&t signal. even when I'm right on top of it with my cell phone it doesn't cut out the signal so now at least I have somewhat of a way to check it but I still rather use the am broadcast band because of the fact that FM is easily a problem. If I ever do run FM there's only two transmitters I will operate the one I got or the decade ms-100.
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Post by mark on Nov 28, 2020 1:18:34 GMT
That's really amazing that your Chinese transmitter was doing all that damage all over Deltaville!
Wow!
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Post by thelegacy on Nov 30, 2020 4:27:22 GMT
After riding around and finding where the tower was it really makes a whole lot of sense. If the harmonic frequencies or Spurs are coming out of the transmitter almost is strong as the fundamental frequency you can see how it could happen.
Unless you know where the cell phone towers are you might have no idea what could be going on. Not to mention the fire department which transmits in the 150 something band. I don't know if I was actually coming in on that but I do have a good idea about the 700 MHz deal I also read another article somewhere about where someone got a NOUO and was running one of these transmitters and guess what the interference covered 700 MHz which is the frequency of the GSM cellular carriers in particularly AT&t. Since I'm an AT&t customer I got confirmation exactly where the cell phone tower was and amazingly it was right across from the Deltaville market. So when I finally got the signal to reach the Deltaville Market with a good solid signal it also wiped out the cellular phone tower which again makes a whole lot of sense. This proves beyond a shadow of a doubt these transmitters do create all kinds of damage.
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