Part 15 Rangemaster AM Transmitter Set-up and Upgraded Studio Components
Uploader Comments (zappatx)
All Comments (22)
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@MichaelJGrant My experience has been that installations delivering a useful signal beyond several hundred feet almost invariably, assuming the transmitter itself is compliant with regard to input power, have questionable ground leads. The same RF current that flows to the antenna also flows in the ground lead. Therefore, the radiated signal depends on the radiation resistance of the element it passes through. The longer the element, the greater that resistance, the stronger the signal.
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@zappatx The problem with Part 15.219 is that the term "ground lead" is vague. Of course, a cable from the transmitter 's ground terminal to a "ground" is a ground lead. But what about when the transmitter is electrically bonded to grounded support structure such as a tower or mast which was the case with KENC? Does the support structure become a "ground lead" under the regulation? KENC seems to have pursued its due process rights to no avail.
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Website is down...
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I was considering the Rangemaster for part 15 AM but I had to pass it up because I do require C-QUAM AM stereo generation for my purposes. That aside it looks like a nice performing transmitter for what it does.
Got a call from a station using higher power in Texas who was visited by the FCC. Seems they got their case thrown out because they sued the FCC as the agents had no Oath of Office! FCC is hiring retirees to go after people wanting to become the media in their areas to try to scare others from doing this but these agents have no jurisdiction as they do not have valid credentials.
zappatx 1 year ago
You have a mighty impressive setup for certain. It might be worth a trip for me and a steak dinner for you to see a *compliant* Part 15 installation that can deliver a useful signal at 4 miles or even half that for a single transmitter. You might want to check out the enforcement action against KENC that claimed similar range with the same transmitter you are using.
MichaelJGrant 1 year ago
@MichaelJGrant KNEC happened to get a Agent who was betting the US citizen didn't know his rights and due process. I got lucky as the the agent in my district was very cooperative. We have 5 transmitters ganged together covering over 6 miles (4 reliable but detectable as far away as 6 or so) in one spot which were turned off when the agent showed up. One location passed and one failed but we have made corrections.
zappatx 1 year ago
I am thinking about purchasing a range master, and i don't want to have an problems with FCC. So would you please reply to this and tell me if its possible to legally put that range master lets say on a roof of a building, like a church so i would get better range? " FCC 15.219 Operation in the band 510–1705 kHz. (b) The total length of the transmission line, antenna and ground lead (if used) shall not exceed 3 meters" Does it mean that its illegal to have it higher than 3 meters?
xadekpl 1 year ago
@xadekpl As long as you don't advertise your system too much - forums, websites, etc.. The FCC will never bother you. These units are compliant and are expandable when using several units. These are being installed at a frequency of 1-per week. One 200WT FM with a legal show in Texas got a FCC visit discovered in the FCCs own charter that they lack jurisdiction to go after unlicensed operation not crossing state lines & non-commercial. They filed a complaint in Fed court & the FCC backed off!
zappatx 1 year ago
hey im in australia im a fm pirate ...why would you guys bother with all that gear just for what less than a km in distance ..
just wondering
INTHEMIX74 1 year ago
@INTHEMIX74
One of our several sites covers 16KM. Where did you get 1Km? Hell. I would'nt bother with that either. One single transmitter I can reach on a good day 4 miles radius but our 5 transmitter array covers over 10 miles.
zappatx 1 year ago