this was amazing to me but prob not to you guys.

[austingrace]

hey all. today i was walking around my neighborhood and i heard my little part 15 mobile blackbox v6000 transmitter on 92.7 like three streets away from my house on my eton e10 radio. they say the v6000 transmitter can go 490 feet. i could believe it. just wanted to share this. if you hear random music on 92.7 in altamonte springs florida, it may be me . no, i'm not a pirate. if you want to, you can google mobile blackbox v6000 transmitter. that is the transmitter i was using. thanks.

 

[The Beave]

Austin,

I have done some study over the last 18 months on part 15 transmitters.. Unfortunately 90% are not
in complience, or need to be downtuned. As many have found out reciently they can be picked up to 8 miles away at .1 watt or 40 miles away ar 100 watts. Depending on terrain and set up.

This is why some have been accused to be pirates. That and NO EAS complience or public file at the studios.

 

[austingrace]

wow. that is crazy. i never knew that before. another thing i forgot to mention is that the transmitter broadcasts in mono and that is probably why the signal went as far as it did as well. but i'm going to keep playing with it and see what happens.

 

[nd2023]

I can hear a "Part 15" FM advertising a house for sale a mile away from that house.
Even with this bad housing market, that house will be sold before the FCC even hears about that "pirate" station. The FCC won't shut down pirates that interfere with licensed stations and go 25 miles and have been on for over 5 years.

 

[Mid West Clubber]

Im gonna go out on a limb here,, but I run 250 watts at 700 HAAT on a ridge and can get out 50 miles in some directions, I use 93.7 since our semi local country station signed off the air,,, and I use a filtered NRG Kit Transmitter I cause no interference and the FCC knows about me and doesnt care cause I dont emit sporadic signals into other stations, or cause IF Reflections with airplanes,,, If I was causing interference I wouldnt be on air... I had a truck driver call in driving on I-65 listening to me near Seymour one night,, thats about 50-60 miles from my location,,, so BOB ON THE JOB should easily be able to hear me if he turns his antenna toward Martinsville... Im not on 24-7 though,,,,

 

[radioguybroadcasting]

Im gonna go out on a limb here,, but I run 250 watts at 700 HAAT on a ridge and can get out 50 miles in some directions, I use 93.7 since our semi local country station signed off the air,,, and I use a filtered NRG Kit Transmitter I cause no interference and the FCC knows about me and doesnt care cause I dont emit sporadic signals into other stations, or cause IF Reflections with airplanes,,, If I was causing interference I wouldnt be on air... I had a truck driver call in driving on I-65 listening to me near Seymour one night,, thats about 50-60 miles from my location,,, so BOB ON THE JOB should easily be able to hear me if he turns his antenna toward Martinsville... Im not on 24-7 though,,,,

And you DO know the FCC reads these boards, right? You've given them enough information to find you....

 

[The Beave]

Im gonna go out on a limb here,, but I run 250 watts at 700 HAAT on a ridge and can get out 50 miles in some directions, I use 93.7 since our semi local country station signed off the air,,, and I use a filtered NRG Kit Transmitter I cause no interference and the FCC knows about me and doesnt care cause I dont emit sporadic signals into other stations, or cause IF Reflections with airplanes,,, If I was causing interference I wouldnt be on air... I had a truck driver call in driving on I-65 listening to me near Seymour one night,, thats about 50-60 miles from my location,,, so BOB ON THE JOB should easily be able to hear me if he turns his antenna toward Martinsville... Im not on 24-7 though,,,,

Clubber...

Do you have a clue what the effective radiated power is of an antenna 700 feet HAAT is?



ERP(Effective Radiated Power) is a calculated measurement that describes the peak transmitted power output of the system. It is measured in Watts, and includes peak transmitter power, transmission line losses, and peak antenna gain (as compared to a half-wave dipole antenna).


The formula for calculating ERP is:

ERP = Transmitter Power * Feedline Loss * Antenna Gain

For example, if you hooked your 2 Watt MURS handheld to a 3dB gain rooftop antenna, thru a 50ft. coax cable having a total loss of -3dB, the gains and losses would cancel, and you would have an ERP of 2 Watts.

Figure that out..

 

[Mid West Clubber]

Hey Beave... Dont hate bro,,, I like you so far and support your station... I am very careful not to cause interference to anyone, and I purposely shield my signal to the north so I wont interfere with Warm 93.9,, a Class A 40 miles north,, but well outside protective protected contour.

 

[radioguybroadcasting]

Hey Beave... Dont hate bro,,, I like you so far and support your station... I am very careful not to cause interference to anyone, and I purposely shield my signal to the north so I wont interfere with Warm 93.9,, a Class A 40 miles north,, but well outside protective protected contour.

So? You're a pirate, without a license...

 

[tomservo]

Speaking of out of compliance part 15 transmitters - there are still a mess of XM and Sirius radios out there that were determined to be out of compliance, like my Roady XT. Playing around with the sat antenna cable I can coax (ha) the signal out a good 400-500 feet on a good day. I keep the cable on the ground and behind a computer for convenience, however, so it doesn't normally have that kind of reach.

It's fun tracing these little part 15's. I heard one eminating from a couple towing a camper down an interstate. It was dead air until the phone rang, and then I got to hear half a conversation.

Just a few weeks ago I picked up a Sirius unit playing Mad Dog Radio on 87.9. Made me mad because there's a semi-local TV-6 and I was trying to listen to the news on 87.7!

 

[The Beave]

Hey Beave... Dont hate bro,,, I like you so far and support your station... I am very careful not to cause interference to anyone, and I purposely shield my signal to the north so I wont interfere with Warm 93.9,, a Class A 40 miles north,, but well outside protective protected contour.

No hate here... just hoping you can fathom how much distance even .250 kw can travel on the FM airwaves. I really honestly don't want to see anybody get slashed BUT...
Unfortunarely I have to play by the rules here.

 

[radiorob2.0]

Speaking of out of compliance part 15 transmitters - there are still a mess of XM and Sirius radios out there that were determined to be out of compliance, like my Roady XT. Playing around with the sat antenna cable I can coax (ha) the signal out a good 400-500 feet on a good day. I keep the cable on the ground and behind a computer for convenience, however, so it doesn't normally have that kind of reach.

It's fun tracing these little part 15's. I heard one eminating from a couple towing a camper down an interstate. It was dead air until the phone rang, and then I got to hear half a conversation.

Just a few weeks ago I picked up a Sirius unit playing Mad Dog Radio on 87.9. Made me mad because there's a semi-local TV-6 and I was trying to listen to the news on 87.7!

We have an 88.3 where I live that is obliterated by those modulators, it seems many have that frequency as an option. They are way beyond Part 15 but there is nothing you can do. The NAB wants a mass recall and even if it happened, few would be returned. During the CB boom you were suppose to send off for a license, few did and the FCC finally gave up.

My great Part 15 experimented took place on the atop a seventh floor when I worked for a hotel/convention center. I set up shop in a seventh floor guest room. The dipole was extended vertical in front of the window. The first time I used a Ramsey and then the next time a Landmark. Both times the results were the same: Strong signal for nine blocks, listenable for 12 and a final catch was 25 blocks away. On ground level both transmitters could he heard a few hundred feet.

 

[franksandhotdogs]

Hey Beave... Dont hate bro,,, I like you so far and support your station... I am very careful not to cause interference to anyone, and I purposely shield my signal to the north so I wont interfere with Warm 93.9,, a Class A 40 miles north,, but well outside protective protected contour.

No hate here... just hoping you can fathom how much distance even .250 kw can travel on the FM airwaves. I really honestly don't want to see anybody get slashed BUT...
Unfortunarely I have to play by the rules here.

I'm not hatin' you Clubber, but posting that you operate a pirate on R-I isn't a good idea...unless you want a crap ton of fines :

(Another poster pointed out that some FCC folks read this.)

 

[tomservo]

We have an 88.3 where I live that is obliterated by those modulators, it seems many have that frequency as an option. They are way beyond Part 15 but there is nothing you can do. The NAB wants a mass recall and even if it happened, few would be returned. During the CB boom you were suppose to send off for a license, few did and the FCC finally gave up.

My great Part 15 experimented took place on the atop a seventh floor when I worked for a hotel/convention center. I set up shop in a seventh floor guest room. The dipole was extended vertical in front of the window. The first time I used a Ramsey and then the next time a Landmark. Both times the results were the same: Strong signal for nine blocks, listenable for 12 and a final catch was 25 blocks away. On ground level both transmitters could he heard a few hundred feet.

I know I wouldn't give up my radio for some silly recall. It may technically be out of compliance but that also means... It works! I can actually listen to the transmitter all over the house with my most sensitive radio. I've got a little Belkin unit that probably more closely meets the restrictions and it doesn't work well from more than 30 feet or so.

That hotel story is pretty cool and makes me wish there was a building around here for me to get on to play with. The highest I've had my part 15 is about 15 feet. :-[