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Part 15 transmitter
- Thread starter Thisi
- Start date
Ramsey Electronics makes a good unit....IIRC, it comes as a kit or assembled......
Hamilton makes a "remote" operated rig -- the transmitter /antenna assembly is mounted on a mast/pole and connected via a multi-conductor cable; if you have the space, this is the way to go.....height, but still legal under Part 15!!
PCM Electronics has circuit-board units that can be mounted in a mini-box, but require fairly extensive buildout for a complete transmitter.
Are you looking to go FM....or AM? AM allows a bit more latitude with power (100 milliwatts max) and antenna length/height (10 feet max).......FM max figures are based on signal strength at a given distance from the antenna (250 microvolts @ 3 meters)....
Good luck!
Hamilton makes a "remote" operated rig -- the transmitter /antenna assembly is mounted on a mast/pole and connected via a multi-conductor cable; if you have the space, this is the way to go.....height, but still legal under Part 15!!
PCM Electronics has circuit-board units that can be mounted in a mini-box, but require fairly extensive buildout for a complete transmitter.
Are you looking to go FM....or AM? AM allows a bit more latitude with power (100 milliwatts max) and antenna length/height (10 feet max).......FM max figures are based on signal strength at a given distance from the antenna (250 microvolts @ 3 meters)....
Good luck!
I don't want a huge one, just a small one for home use.
What's the range? My station will be on 91.7 and maybe on 101.7 or 102.4.Here's one.
I've had several of the CCrane FM Transmitter. They are very handy. simple and sound good. Two things: The range is very short ~20-30ft until you open it up - and turn a small pot with a small screwdriver which increases the power output - google "CCrane FM transmitter mod" After the mod the range can be 300 feet. (it's still within legal limit- but voiding any warranty of course just because you opened it - no big deal_ lol). I will say that the on/off button gets flakey after some time, but if you keep pressing it repeatedly it eventually will turn on again.Here's one.
I suggest that you stay away from those Chinese FM transmitters which are all over eBay. They put out dirty signals and are not legal in the US. Most of them do not modulate well either.
This is so very true!!!
Good news. The FCC has granted approval to a Part 15 FM Transmitter that gets out about 1/2 mile to cars from the second story of a wood frame house. Look for Chinese units with this notation.
Check the FCC data on this unit at
FCC ID 2ASVO05B7CT200
I suspect somebody lied their butt off to get this certification, but the FCC has granted it, so party on. Just over $100 at Amazon. Modulate it with properly processed audio and you're laughing.Check the FCC data on this unit at
This is an oxymoron. The typical range for a Part 15-compliant FM transmitter is about 200-400 ft. You might exceed that if you mount the antenna outside at a considerable height, have no obstructions and use a sensitive receiver, but you won't reach half a mile (2,640 ft).
One of the units that claims FCC certification under the ID in Roxanne's post specifies coverage of 900~1600 feet. But the instruction manual for the unit claims a selectable power output level of either 1 watt or 7 watts. Unless the antenna provided with the unit is incredibly inefficient, that's going to exceed the Part 15 allowable field strength.
For comparison, the certified C. Crane unit I linked to above claims a range of 40 - 70 feet.
this transmitter is not part 15 compliant.. its capable of 7 watts
That FCC certification is fake. The one they submitted for testing was limited to Part 15 power levels, but the one they're actually selling is capable of putting out up to 7 watts.
The best range you'll get from a legitimately FCC Part 15 certified FM transmitter is the Whole House FM Transmitter 3.0:
The best range you'll get from a legitimately FCC Part 15 certified FM transmitter is the Whole House FM Transmitter 3.0:
I use one of these, keep it on the low range (100mw), in your house or office and you won't get caught.
I'm too Poor to get a Transmitter, All I have is a Wireless FM Transmitter I have since 09, Only goes up to 50 ft
Also keep in mind that all of these Chinese FM transmitters are pre-set for 50 µS pre-emphasis, which will sound dull on U.S. receivers. Even if the specs claim it uses 75 µS pre-emphasis, that's a lie -- they're all 50 µS.
100mw is more than the FCC permits unless you use a very short antenna. It's all about signal strength, not output power.
You can find information about Part 15 transmitters (both AM and FM) here:
That is true. I had to modify my part 15 FM transmitter to accept an MPX input. I don't think any were ever sold with an MPX input included from the factory.
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