I know you think this is a strange request, but where is the church located or the name of the church, and how far away are the listeners? I did a database check and you should find usable AM frequencies above 1600.
Thanks, John
not bad 🙂 i have a question if ido am could iuse the istron am broadcast antena i heard that if i tune it well icould cover a 9 mile range
ONCE AGAIN FM IS LIMITED TO FIELD STRENGTH AND NOT RANGE.. I USED THE ULTIMATE BROADCASTING FOR A COUPLE OF YEARS WHEN I WASN'T DOING CARRIER CURRENT... I HAD A RANGE OF 5 MILES WITH IT AT A FIELD STRENGTH OF 0.0000000675 UV/M!
IT IS DESIGNED FOR PART 15 FM TO GO FARTHER WITH LESS FIELD STRENGTH AND STILL BE LEGAL...
IT IS NEW TECHNOLOGY AND KDSX WAS THE FIRST TO USE IT AND DEMONSTRATE IT...
ENGINEERS GET ANAL ABOUT THIS ANTENNA BECAUSE IT HAS MORE RANGE. BUT RANGE DOESN'T MATTER ITS THE FIELD STRENGTH AND ITS COMMON ENGINEERING SENSE...
WHEN YOU HAVE MORE RANGE WITH HIGH FIELD STRENGH YOUR NOT LEGAL...
IF YOU HAVE MORE RANGE WITH FIELD STRENGTH LESS THAN THE LEGAL LIMIT YOUR LEGAL...
AND THE ULTIMATE BROADCAST ANTENNA I USED FROM RADIO BRANDY IS LEGAL TO USE AND I HAVE PROVEN IT MYSELF AND THE FOLKS AT RADIO BRANDY...
ITS LEGAL TO USE
AND ALL YOU GUYS WONDER WHY I LEFT... WELL SUPRISE!
ABMEDIa1 thanks for the info 🙂 iknew radio brandy antena was legal! now am off to broadcasting the legal way 🙂
Attention ABMedia1
You left? How come no one told me you left.
I am surprised that you left, and I still don't understand the reason for leaving.
Whatever it was, my suggestion is to come back!
Yes, come back to Part15.us, a place where you are very welcome.
Don't leave!
?
Unfortunately the information presented at the Radio Brandy website for "The Ultimate Antenna" gives no clue. From the description and visuals presented it would appear to be nothing more than a simple halfwave vertical dipole center fed with a balun. It has a standoff to reduce interaction with the structure its mounted on.
Seems to me range is dependent upon field strength. So unless we're talking about the receive antenna the transmitted field strength would have to be greater to increase range.
A directional transmit antenna such as a Yagi can improve range to a certain area with the same transmit power at the cost of reduced range to all other areas. That's why they call them directional antennas.
Any gain antenna increases range by concentrating the signal where you want it. Even a ground plane antenna which is omni directional does this by moving signal from where you don't want it (vertical plane) to where you do want it (horizontal plane.) The end result-increased field strength where you want it for increased range.
I'm not saying the antenna doesn't work. I'm just curious to hear about the theory behind it and the info presented only presents a claim. It's difficult to grasp increased range with no increase in field strength unless you're talking about a gain antenna at the receiver.
For those who wish to comply with FCC §15.239 for unlicensed systems in the FM broadcast band -- neither the radiation pattern of its transmit antenna, nor the output power of its transmitter is limited.
The only limit for systems compliant with FCC §15.239 is that the field intensity radiated from that transmit system must not exceed 250 µV/m at a distance of 3 meters in every direction from that transmit antenna.
As a calibration point: a simple, center-fed, 1/2-wave dipole produces that 250 µV/m maximum field when radiating about 0.000 000 011 43... watts (11.43 nanowatts).
The rated output power of many commercial transmitters offered and likely used for "Part 15 FM" typically is __FAR__ more than required for compliance with FCC §15.239, even when using the simplest, non-directional transmit antenna.
True, true and true. The ONLY requirement for compliance with 15.239 is the correct field reading at the given disatnce... as distinctly said by Rich.
In addition to knowing that fact it is very worthwhile, from time to time, to discuss ways and methods the home user can employ to comply.
The home user, as we often agree, does not have the measurement equipment or skill to technically confirm his field strength at the specified distance, so he needs a fair and reasonable way of making a "best estimate."
It has often been said that the legal range of a Part 15 compliant FM transmitter would reach 200-feet before beginning to fade out beyond that distance.
But experience finds that 200-feet on one FM radio is different from 200-feet on another FM radio. I have radios that will not receive a Part 15 FM transmitter beyond 30-feet and other radios that do much better.
Therefore 15.239, while being true and factual from a technical vantage, does nothing to aid the home broadcaster to assure compliance.
By ignoring that difficulty the conversation is incomplete.
One way for a user to ensure compliance in the absence of expensive test equipment is to use a certified FM transmitter with its unmodified antenna. Here are information links for the Whole House FM transmitter:
Whole House transmitter specs: https://wholehousefmtransmitter.com/technical-specs/
FCC Authorization Search: https://apps.fcc.gov/oetcf/eas/reports/GenericSearch.cfm Search for XOA in Grantee Code box, click on "Detail" in "Display Exhibits" column for FCC ID XOAWHFM3. In the OET Exhibits List, click on "New RF report" to bring up the certification lab report.
The transmitter was measured on the test table operating on internal battery power with no audio connection or ground connection. Maximum field strength was 46.52 dBuV/m (212 uV/m) at the high end of the band.
The Whole House website guarantees the range is 150 ft. and says "The Whole House is the furthest broadcasting FM transmitter on the market RIGHT NOW and meets all the stringent FCC rules and regulations on distance".
The lab report includes a detailed list of all the test equipment used, probably with a total value of several hundred thousand dollars. Even if there was some sort of affordable way for us to accurately measure FS, like maybe a couple hundred dollars, I think the average enthusiast would end up being very unhappy about spending that couple hundred dollars on a meter that simply confirmed that his maximum compliant range would only be a couple hundred feet. He would likely lose interest very quickly.
As for the legality of the various highly effective antennas being sold for Part 15 FM broadcasting, they are all legal. There are no FCC rules pertaining to antennas, so any antenna is legal to be sold and may even be legal to use. The FCC rules apply only to the end result of the combination of a particular transmitter and a particular antenna system, and this is the sole responsibility of the user. The combination of an imported 1, 5, 10 watt or more transmitter and a big outdoor antenna results in a P-I-R-A-T-E station, not an FCC Part 15 compliant station (not even close!)
Bottom line is, if you are a pirate, then do whatever you want and accept that the FCC will likely shut you down soon or later. If you are concerned with legality of your operation, make sure your range is a few hundred feet.
carl, i left because after the carrier current fm episode on here where i had to cuss people out on here which was nessecary it wasn't unnessecary because they asked for it... not long after that i got an email to be from p15gngdwn@+++++++.com and started to use threats against my carrier current fm myself my family and the whole nine yards. i got off of here because of that and i know someone on this website did it and i know who did it... i dont have solid proof but i know it in my gut... so i contacted the local fuzz in my hometown... they told me that the person who used the email used several hi tech advanced proxies to disguise themselves because whoever did this wanted to hide themselves and i think they knew whoever did it on here knew i was going to raise hell on here...
to everybody else i have proof charts and diagrams and all of that... but the problem is, that
I HAVE AUTISM k!
a common trait on the autism and autism spectrum is that i can not draw very good at all and write at all not anybody like me could if i showed my studies you wouldn't understand it...
i have field strength metres and spectrum analysers and all of that test and mesauring equipment too thats how i came up with the results...
look bag me down all you want but im taking a stand for myself and i will be treated or threatened like i was on here...
Andrew, It is terrible to find out that someone sent you threatening messages from a hidden proxy. I wish I understood why there was a reason for anyone to get so unpleasant over such a simple topic as FM Carrier Current.
From the description you gave, it sounds like a psycho is lurking somewhere.
I enjoyed your experience with FM Carrier Current. It is bold and wonderful experiment.
I hope you are back to stay, and if anything suspicious happens again, please contact the admin here at part15.us
I think we've all been there at one point, ready to throw in the towel and chuck it all. But, Radio is in the blood. You can't abandon it however you may try.
Glad you are posting. Stick around.
All FM antennas are legal.
IT IS NOT YOUR JOB TO RAT PEOPLE OUT TO THE FCC OR THREATEN THEM BY PHONE OR EMAIL, ITS THE FCC'S JOB TO CHECK PEOPLE OUT AND ADVISE OPERATERS WHAT TO DO ON PART 15, NOT YOURS RICH RLKOCHER AND EVERYBODY ELSE ON THIS WEBSITE...