A quick comment on not asking anyone at the FCC anything as you will get different answers…..If all these agents knew their stuff you should get the same answer no matter who you talk to.
A good illustration of that concerns the “200ft” public notice to which FCC Reed responded: “The non-technical author of the notice should have checked with th…[Read more]
It’s not always best to “just ask the FCC” about specifics and interpretations. Case in point for example when John Reed responded to queries and stated that the wires in a loading coil are calculated into the 3 meters.. a statement he later recanted, and amongst some of the same FCC responses were some indicating that buried ground radials might…[Read more]
Well, noticed about ten more votes had been added since I posted (bringing it to 412 of the needed 1,000 votes). Anyone here place votes? I hear it rumored that the FCC is going to make it mandatory that all part 15 stations have one of these in their studio as paraphernalia in their stations.
Possibly. But other things equal, not with the coverage radius and reliability of an illegal installation..
Well we weren’t talking in reference to an illegal install, but it’s good to hear your conformation that it is plausible that over a mile can be legally achieved.
Out of curiosity do you also agree that an legal elevated grounded install…[Read more]
I wondered that because it seems it would function as an extended dipole antenna more than as an artificial ground plane, although most of the frame is situated horizontal.
Either way, I doubt it would face any legal ramifications for operation.
IMHO he would be just fine using the cab/body of the truck as a ground plane. No ground lead required.
I suspect your right. However wonder how that would factor in to the 3 meters.
I tried using google advance search this site to find that old post about the part 15 red truck mobile station – still with no luck. Also still curious about more…[Read more]
Basically, it all depends where you live, and what you’re using to listen.
That about sums it up, location and it’s surroundings makes a major difference upon range for part 15, as does the receiving radio itself.
I do suspect however that a completely legal install could feasibly achieve over a mile radius providing the conditions (terrain, g…[Read more]
I googled what Carl described “roving radio truck”, and this was what came up:
“..In 1951 Laboe built his own “roving radio” truck, a mobile DJ booth that had regular stops on street corners on Jefferson, Manchester, and Crenshaw in South LA, among other places. By 1956, he says, on the Los Angeles radio station KPOP he was the first DJ to pla…[Read more]
All I’m saying is that historically (1968 to 2019) the commonly acceptable range of 15.219 has consistently been under a mile.
I’ve never come across a single indication found in any published documentation in the last 50 years, such as those found in magazine or newspaper articles, natural and state park documentation, highway department…[Read more]
I think you at one time had suggested something like sticking a long PVC pipe vertically in the ground and filling it with dirt with the lead running through it.. ! Technically I suppose a 40 foot high dirt filled PVC pipe could then allow a grounded 3 meter install to be elevated!
Something that has occurred to me since the inverted 3 meter…[Read more]
Years ago.. at least 8 – 10 years ago, maybe longer.. I recall a discussion which I believe took place here in these forums about some guy with an old pick up truck, or maybe it was an enclosed van, but if I recall right was a raggedy old thing (for some reason I think it was red) and he used it as a mobile part 15 station… There was something…[Read more]
“…but with a long ground lead that signal increases and can overcome an obstruction.”
That is a generalization and an assumption and probably also an exaggeration.
No it’s not! The longer your ground lead, the more field strength it produces, and the more capable it becomes to penetrate buildings so you can receive it inside and beyond.. How is…[Read more]
Personally I don’t think the ALPB ever really got off the ground at all.. I was never really a participant of it but did participate in the forums. You call it a ghost of what “it was”.. not sure if you meant the group or the forum itself.
I think there is still hope for it, as well as the newly renamed forum which has taken the place of what…[Read more]
Yeah well, I agree, in this thread you seem to be saying obstructions do disrupt or block a signal, but that it will recover again some distance beyond that structure, and its strength at that distance will be equal to if there was no obstruction anywhere in that path at all..
I guess I can agree with that in the real world of part 15, however in…[Read more]
You’ve not made a response to any of the views expressed in this thread of yous Rich. You asked, we answered. Is your reaction only silence? Or are you still mulling it over?
And by the way.. speaking for myself, my intentions is not to demean you, I am only honestly expressing what my conflicts with you is about.
Which brings up another thing.. The talking house is certified to operate by achieving ground via the neutral plug on the power receptacle.. therefore legal. So, if I put a power outlet on my roof and grounded my Rangemaster in the exact same manner, would it be considered legal?
The point I am making is that in most if not all of these cases the radiating ground lead is in close proximity to some sort of obstruction. That being said, maybe it’s possible that some obstructions have little or no effect on MW signals?
That, it seems to me, is due to the increased field strength those excessively extended antenna systems w…[Read more]
Over the years the FCC has cited many AM Part 15 operators for ground leads that are excessively long and as such become radiators as well. There is no dispute from me on this point.
I’m not disputing that either. That’s not what I meant. I was only pointing out that longer than 3 meter installs (such as grounded elevated transmitter pole mounts)…[Read more]
There’s never any getting away from the issue of the three meters, it always has and always will be an intricate yet convoluted aspect of part 15. From my observations of historic and established use, the primary concern has always been more focused on ensuring the range is limited (that’s why there is a 3 meter rule), but it’s strikingly…[Read more]
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