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I don’t know. If we think an FCC equipment certification overrides an FCC Rule applicable to that equipment, the Rule probably doesn’t mean what we thought it did…
John
W9LWA
Ok Rich, the model with the ATU is irrelevant. Let’s assume the ATU is fed vertically with 25 feet of coax. Only a twit would place the transmitter at the base exposing it to weather. Your modeling does not show a fence mounted (3 feet) ATU with much of the coax horizontal or laying on the ground. As I said, you have no idea how I or anyone else will mount this device.
You have earned the title of “Resident Hobby Agent.” It’s time for you to find some new material.
John M. — I did not attempt to model the system you (apparently) are thinking of installing.
In fact, your description of it didn’t appear here until AFTER I posted my graphics.
If you are not installing the system I modeled, then of course your setup will not produce the results shown for the system I modeled.
My model of the system with the ATU shows its radiating components, no matter in what geometric arrangement they are installed.
Well for years people thought the final stage of the transmitter meant the final transistor and that was what everyone was going by thus we saw waterproof transmitters with their audio or power lines going up a 20 Ft pole to the transmitter.
Talking Sign had an ATU/transmitter configuration whereas the transmitter was inside the house and the antenna tuner and antenna was mounted on a 20 Ft pole. Many said it was illegal because they counted the 25 Ft of coax as part of the antenna system a ridiculous notion but one that certain hobby hall monitors would drum into our heads.
Then came the Talking House and their transmitter/ATU combo and again the red flag was raised again. But as we see the slew of NOUO’s for FM and the number of NOUO’s for AM which is almost non existent that didn’t really matter to the FCC so the common citizen has to take the facts and examine them. I say the FCC is saying the final stage is what is comming out of the antenna tuner NOT the transmitter which is Good News.
I could say a few things I’ve experienced but then again I’d have to put links up as proof of this so I won’t bother but read between the lines here. Its what is coming out of the ATU that matters. So if the stub of the antenna has 100 mW your legal. Your transmitter could have 1/2 Watt but due to coax loss or whatever as long as that final (in this case the ATU) reads 100 mW (Or Less) its legal. It could be why certain transmitters that were part 15 (and tested elsewhere past 100 mW to the final was allowed to be sold as a kit so long as it was connected to an ATU).
Rounding this back to the topic at hand the Talking House transmitter has not changed its power to get to the ATU although if 10 Watts ever became legal one could slap an amplifier on the back end of the transmitter and there you go 10 Watts. But the point is that as long as you con’t connect a long ground from the ATU to the ground rod your legal. Even then the FCC has seemed to relax that as well as they should AM is a dying band why worry about all of this crap just enjoy the hobby and what you have. Use certified equipment and don’t go overboard and try and blatantly break the rules and you should be fine.
The FCC’s main concern is interference. It was their main concern when they visited me so all the other stuff is icing on that cake.
Oh and while I brought up Interference it would not hurt (If you know how to build or where to buy) a filter that goes from 1.8-7 to 10 Mhz. My broadcast engineer friend and I have tested the Talking House and saw plenty of harmonics going into the Ham band and SW bands almost as far as the fundamental frequency. I’ve mentioned this and still no one has offered where to buy or how to build a proper filter for this. If we are to be responsible operators and we know this is the case and we do nothing about we’re willfully knowing about the problem and yet we continue to be on the air why?
Any fine business operator takes care of such issues before continued operations and yet I’ve pointed that out and more concern is being handed to ground lead issues. Fix the real issue here don’t fix what is not broken.
Rich, the Talking House plus coax and ATU as an entire configuration was certified under Part 15.219 by the FCC. That means that it complies with those rules, as long as it is installed as supplied with no modifications made (including attaching a long ground lead). I’m struggling as to why you posted those calculations (someone might infer that using it doesn’t fall within the rules), and wanted to make sure that anyone reading this thread understands that it is perfectly legal to use said configuration.
Thelegacy, again, since the Talking House is certified, any spurs or harmonics fall within the parameters allowed by Part 15.219 (if installed and operated as stated in the documentation). No filter is required (but if it makes you feel better, go for it).
Can the spanking new Range Extender be set up indoors? Not everybody has tons of front yard or back yard to work with.
Earlier today I posted a reply to this thread, then made a small edit to it after it posted. I got a message saying that I already posted this, and it was a duplicate. In that process it did not post my edited version, and it removed the original version.
Here is the final version as a graphic image.
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There’s nothing to apologize for, AMRadioLegend. We all appreciate updates on this highly anticipated device.
Rich, the issue of the legality of the Talking House & Range Extender has been dealt with extensively here in the past.
From the website of the manufacturer:
“When I connect my Talking House Transmitter to a Range Extender (Antenna and Tuner), is the coaxial cable between them considered to be part of the ground?
It is not. FCC approved the Talking House Transmitter for operation with interconnecting coaxial cable and its Range Extender, which is comprised of the 3-meter antenna/ground as a complete system under Part 15.219.”
It is YOU who, by inference, is casting doubt on the legality of this system, and the position of the FCC on its use (even when it’s been certified). That is NOT on topic for this thread. Start a new thread if you must (which people can ignore if they want), but stop immediately in this one.
AM Rado Legend I want to see what your tests show in Range. Its a system easily workable and one can easily put the Range Extender in a place with few obstructions and bury the coax if the need to. We need people like you who are willing to do the reports and or videos of the actual Range.
Time to Rejoice.
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