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C.Crane Part 15 FM Transmitter 2

When the inverse field is 250 uV/m at 3 meters (48 dub), the most it could possibly be at 300 meters in unobstructed free space would be 2.5 uV/m (8 dBu). That would be BARELY receivable at 984 feet away on the best of receivers, with a clear sight path, unless one or both used directional antennas. I used to hear a 50 kW Class B station about 180 miles away with an FM-10 and a Technics ST-G5 Tuner with a digital signal meter, and it registered a fairly consistent 14 dB on the digital signal strength meter. This was before all the Docket 80-90 related cochannel drop ins signed on later in the 1980s.

So unless you are on a very clear channel with no cochannel or adjacent channel interference, that would also limit the range. I'd say on 87.75 or 87.9, it might work that far, but those aren't available.
 
I bet you could get the C Crane FM Transmitter 2 to go out close to a mile under the most ideal topographic conditions. This is, of course, my experience with the CCrane FM Transmitter 2 and not the Whole Home Transmitter, but if I had one of those, I bet the signal could go out even further under ideal setup and conditions.
I have taken a Whole House Transmitter with me on every vacation stay at our usual spot on the Gulf at the Florida border. We stay in a condo on a building that is 12 stories high. Normally, we rent from a friend who's unit is on the sixth floor, but one year, she had family staying at her place during the only time we could get away, so we rented a place on the 11th fooor. Long story short, from floor #11, I could detect a signal nearly a half-mile away.

Notice that I said "detect a signal" and not "listenable". The signal was barely "listenable" at the swimming pool, 11 stories down. There were three problems. 1.) The FM dial at that location is rather full to begin with. 2.)Tropo is frequent, Which routinely brings in intruding signals from 100 miles away or more (Think Panama City to New Orleans...and beyond). 3.) I usually transmit from an 18-year old laptop that I use only as a jukebox and keep in a work area that's in the center of unit....,away from windows and sliding glass doors.

It all works great inside the unit and out on the wraparound balcony, but even on the 6th floor, the poolside results aren't all that much better than what I was getting from 11 floors up. (I normally operated on 107.9, which was reasonably clear except for occasional tropo intrusions from the 107.9 out of Panama City).

Barring any unforseen last minute developments, we have our usual 6th floor unit reserved for the entire month of February. I had already planned to do a little experimenting with the Whole House TX. So if I get ambitious instead of just turning in to a disgusting lazy beach bum, I'll report anything of note I come up with.
 
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I bought one several years ago and it stopped working after a week or two. I would not recommend. It's not the only time C Crane sold me a faulty product.
I've never owned a C Crane transmitter. I did purchase a C Crane Skywave multi-band receiver in April and have been very happy with it for the most part. BUT I did have an issue with it earlier this month. I changed the batteries (2 AA cells) earlier this month. After I installed the new batteries, the LCD display flat-out disappeared. The light went on, but NO Frequency display or anything else. I tried everything I could think of to bring it back to life, but no luck. Meanwhile, the radio continued to perform just fine.

I finally gave up and was ready to send the radio back for warranty repairs or replacement. But the next day, before doing that, I got a bright idea.... I took out the new batteries I put in, and then just re-installed them. Problem solved. It's been fine since.
 
Perhaps I'm being dense here but in a whole house situation or even out by the pool, why not use Bluetooth? I have 2 phones and an ipad that aren't connected to a network but use wi-fi and can broadcast to my ear buds or wireless speakers. In my house they can even broadcast to my TV. When I was in Daytona (Ormond Beach) last year I could carry my phone all the way out to the beach and still pick up wi-fi from the hotel we were staying in. That kept me listening to music the whole time I was there.
 
Perhaps I'm being dense here but in a whole house situation or even out by the pool, why not use Bluetooth? I have 2 phones and an ipad that aren't connected to a network but use wi-fi and can broadcast to my ear buds or wireless speakers. In my house they can even broadcast to my TV. When I was in Daytona (Ormond Beach) last year I could carry my phone all the way out to the beach and still pick up wi-fi from the hotel we were staying in. That kept me listening to music the whole time I was there.
I was kinda wondering that myself. It seems there are a lot of ways to achieve distribution/connectivity in/around your home and different ways you could set something like that up. For me, the only time I considered an FM transmitter was when I used to jog around the neighborhood for exercise, my favorite station I used to listen to was too weak to pick up on my portable radio, but my system in the house could receive it just fine. This was long before the days of streaming via smartphones and other devices, so my idea way back then was to buy or build a transmitter so I could receive the station I wanted to listen to on my home system, then re-transmit that so I could listen to it while jogging. I wasn't even limiting myself to the broadcast band, I was also considering FRS and other frequencies. In the end I decided it wasn't worth the cost or research into the legalities. Now, of course, nearly any station or music I want to listen to is available to stream on my phone or smart speaker, and if I want to listen to my personal library nearly anywhere, there are small and compact MP3 players with a few hundred gigs for very little money, relatively speaking.
 
As a "heads up," the FCC is quite active at finding and issuing citations to unlicensed users of the FM broadcast band that do not meet their Rules. Below is a sanitized example of this ...


FEDERAL COMMUNICATIONS COMMISSION

ENFORCEMENT BUREAU
Northeast Region

New York Office
201 Varick Street
New York, NY 10014

NOTICE OF UNLICENSED OPERATION

Case Number: XXX
Document Number: XXX

The New York Office received information that an unlicensed
broadcast radio station on XXX MHz was allegedly operating in
XXX, NY. On XXX, an agent from this
office confirmed by direction finding techniques that radio
signals on frequency XXX MHz were emanating from your property
in XXX, NY. The Commission's records show that no
license was issued for operation of a broadcast station at this
location on XXX MHz in XXX, NY.

Radio stations must be licensed by the FCC pursuant to 47 U.S.C.
§ 301. The only exception to this licensing requirement is for
certain transmitters using or operating at a power level that
complies with the standards established in Part 15 of the
Commission's rules, 47 C.F.R. §§ 15.1 et seq. Your operation on
frequency XXX MHz was measured at 392 microvolts per meter
(µV/m) at 483 meters. This exceeds the allowable unlicensed
limit of 250 microvolts per meter (µV/m) at 3 meters established
in Part 15. Thus, this station is operating in violation of 47
U.S.C. § 301.

You are hereby warned that operation of radio transmitting
equipment without a valid radio station authorization constitutes
a violation of the Federal laws cited above and could subject the
owner of this illegal operation to severe penalties, including,
but not limited to, substantial monetary fines, in rem arrest
action against the offending radio equipment, and criminal
sanctions including imprisonment. (see 47 U.S.C. §§ 401, 501,
503 and 510).

UNLICENSED OPERATION OF THIS RADIO STATION MUST BE DISCONTINUED
IMMEDIATELY.

You have ten (10) days from the date of this notice to respond
with any evidence that you have authority to operate granted by
the FCC. Your response should be sent to the address in the
letterhead and reference the listed case and document number.
Under the Privacy Act of 1974, 5 U.S.C. § 552a(e)(3), we are
informing you that the Commission's staff will use all relevant
material information before it to determine what, if any,
enforcement action is required to ensure your compliance with FCC
Rules. This will include any information that you disclose in
your reply.

You may contact this office if you have any questions.

Daniel W., Noel
District Director
New York Office

Attachments:
Excerpts from the Communications Act of 1934, As Amended
Enforcement Bureau, "Inspection Fact Sheet", July 2003
 
The calculation posted below should be useful to those thinking the NOUO citation I posted above required some combination of a high power transmitter, a high gain transmit antenna, and/or a transmit antenna mounted high above the Earth.

FCC NOUO Math.png
 
The FCC generally acts on complaints versus going out there to try to find something. I've seen that boiler plate letter to unlicensed broadcasters. If the offender is cooperative, complies and responds within the time frame, there is generally nothing more that happens. I would imagine if you create any issues, the FCC will show their teeth.
 
The FCC generally acts on complaints versus going out there to try to find something. I've seen that boiler plate letter to unlicensed broadcasters. If the offender is cooperative, complies and responds within the time frame, there is generally nothing more that happens. I would imagine if you create any issues, the FCC will show their teeth.
Agreed. If nothing else, the FCC and field offices are way too understaffed to go around looking for every church group or even kid in their basement who's got a transmitter that's a bit out of compliance. If they get complaints, sure, but even then in many cases they can be slow to act.

I'm also sure they take a very different approach and weight when dealing with a church who meant well and was just trying to have services broadcast to their congregation while sitting in their cars during covid, and they bought a transmitter on Amazon which claimed in the advertising on that site to be legal and FCC compliant, vs. a true "pirate" broadcasting at higher power, interfering with legally licensed stations' signals or getting complaints from those living/working nearby.
 
Perhaps I'm being dense here but in a whole house situation or even out by the pool, why not use Bluetooth?
My 18-year old laptop was not equipped with bluetooth. I have used bluetooth at the beach/pooll with other devices. I also purchased a bluetooth transmitter that does an excellent job, and I plan to bring with me on my next beach visit. Also the question originally posted in this thread pertained to FM transmitters. I was responding to that. Hope that explains it. :)
 
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My 18-year old laptop was not equipped with bluetooth. I have used bluetooth at the beach/pooll with other devices. I also purchased a bluetooth transmitter that does an excellent job, and I plan to bring with me on my next beach visit. Also the question originally posted in this thread pertained to FM transmitters. I was responding to that. Hope that explains it. :)
CyberDad- do you have a pic or at least a model number and brand of your Bluetooth transmitter; I’m hoping it can ran off batteries, a USB or a.c.; the one that operate off of a car cigarette lighter are numerous and I have a good one for my older (2007-vehicle) but would like one that can be used within the house. TIA!
 
CyberDad- do you have a pic or at least a model number and brand of your Bluetooth transmitter; I’m hoping it can ran off batteries, a USB or a.c.; the one that operate off of a car cigarette lighter are numerous and I have a good one for my older (2007-vehicle) but would like one that can be used within the house. TIA!
Brand name is "Lendaway". It's transmits and receives, has an internal battery that you can re-charge with a USB connection, and only cost me $13 bucks on Amazon. At that price point, I didn't expect much, but figure I didn't have much to lose, so I ordered one and was very pleasantly surprised. audio is very good, connects easily to other devices via audio cable (included), and the battery is good for about ten hours on a charge, or you can operate it by just leaving the USB cord (also included). Range is at ;east 30 feet. I purchased mine about three months ago, and will most likely buy one or two more.

Here's a link from Amazon, which hopefully will take you to more info.... https://www.amazon.com/dp/B083J98ZFX?psc=1&ref=ppx_yo2_dt_b_product_details
 
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Brand name is "Lendaway". It's transmits and receives, has an internal battery that you can re-charge with a USB connection, and only cost me $13 bucks on Amazon. At that price point, I didn't expect much, but figure I didn't have much to lose, so I ordered one and was very pleasantly surprised. audio is very good, connects easily to other devices via audio cable (included), and the battery is good for about ten hours on a charge, or you can operate it by just leaving the USB cord (also included). Range is at ;east 30 feet. I purchased mine about three months ago, and will most likely buy one or two more.

Here's a link from Amazon, which hopefully will take you to more info.... https://www.amazon.com/dp/B083J98ZFX?psc=1&ref=ppx_yo2_dt_b_product_details
Thanks, CyberDad; I will order on Amazon this evening; hopefully, if is still available.
 
Perhaps I'm being dense here but in a whole house situation or even out by the pool, why not use Bluetooth? I have 2 phones and an ipad that aren't connected to a network but use wi-fi and can broadcast to my ear buds or wireless speakers.
My idea would be to have multiple radios on one source, all over the house, without headgear or multiple Bluetooth devices.
Exactly. Bluetooth is one-to-one and requires a dedicated transmit and receive device with additional speakers or headphones for each connection. Wifi similarly requires a dedicated device. FM is one to many - any radio, boombox, shower radio or pocket radio can receive your content.

As a "heads up," the FCC is quite active at finding and issuing citations to unlicensed users of the FM broadcast band that do not meet their Rules.
It depends. The FCC generally won't bother you further if you terminate the 'offending' transmission and then choose a lower-profile (non-comm) frequency and apply sufficient attenuation to place yourself below the radar. (Don't ask me how I know this. 😑)

In my area, there is a 24-7 pirate who covers 3-6 miles on a frequency adjacent to a Class B, within that station's protected contour. Apparently, the Class B hasn't complained about interference caused by the pirate. Until I notice a change in that pirate's status, I have to think that the FCC isn't very interested in blanket enforcement in this region. Stay clear of any new proposed translator allocations though.
 
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Exactly. Bluetooth is one-to-one and requires a dedicated transmit and receive device with additional speakers or headphones for each connection. Wifi similarly requires a dedicated device. FM is one to many - any radio, boombox, shower radio or pocket radio can receive your content.
This is why I use my Whole House Modulators. For occasions when I want to cover more than one location. An example would be at my vacation location and I want to have music playing both inside the condo and on the balcony. Alternatively, if I'm only interested in having the music in one location, bluetooth would probably be my choice.
 
Exactly. Bluetooth is one-to-one and requires a dedicated transmit and receive device with additional speakers or headphones for each connection. Wifi similarly requires a dedicated device. FM is one to many - any radio, boombox, shower radio or pocket radio can receive your content.


It depends. The FCC generally won't bother you further if you terminate the 'offending' transmission and then choose a lower-profile (non-comm) frequency and apply sufficient attenuation to place yourself below the radar. (Don't ask me how I know this. 😑)

In my area, there is a 24-7 pirate who covers 3-6 miles on a frequency adjacent to a Class B, within that station's protected contour. Apparently, the Class B hasn't complained about interference caused by the pirate. Until I notice a change in that pirate's status, I have to think that the FCC isn't very interested in blanket enforcement in this region. Stay clear of any new proposed translator allocations though.

First adjacent? Since they allow translators to exist on second and third adjacents as long as an interfering signal 40 dB stronger doesn't reach any potential listeners on the ground, second or thirds aren't an issue as far as interference is concerned. First adjacent translators are allowed 6 dB down at every point where potential listeners are.
 
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