Earlier on another thread there was mention of so many different transmitter manufacturers that I decided to start a new thread just for Transmitters so we can get this thing going. Please tell us rather or not the Transmitter has a certification and if so the FCC ID# if possible. Here is a start.
SainSonic AX-05B http://www.sainsonic.com/sainsonic-0-5w-long-range-10km-dual-mode-stereo-broadcast-fm-radio-transmitter-fashion-black.html
FCC Part 15 compliant FCC ID # 2ABT5AX05B7C Low Power -48dbM/500 mW (To adjust power hold down the power button while unit is unplugged then plug power in. Press Down arrow to switch to -48dbM or up arrow for 500mW Click power to confirm. You'll see the highest frequency 108Mhz click to confirm. Then you'll see lowest frequency 88.1 Mhz click power to confirm. Click again and transmitter will say OFF and the desplay will be dark. Now press power and select a blank frequency.
FM Stereo IC with PLL technology 75uS Audio pre emphasis, Limiter and Low Pass filter circuit. Large Digital display with blue backlight. Aluminum Enclosure. 88.1-107.9 Mhz US Factory setting or 76-108 Mhz outside USA. Tuning step 100Khz/0.1 Mhz. Power Supply 9-12 Volt DC (the current load of power supply should over 1A). Stability of frequency +- 0ppm (-10C +50C). Frequency Response 100-15000 Hz. Frequency to noise ratio >70db. Distortion <o.5%. Operation Time: True 24.7. Antenna Design: Rubber Antenna. Output Impedance 50 Ohm. Audio Input Connector: 3.5 mm headphone connector. Mic Input Connector: 3.5 mm headphone connector. Size of transmitter 113*88*38 mm. Transmission Signal: Stereo. Barrier free broadcast on 500mW setting 1,300 Feet (gray area in USA Note: I put that one in).
All specs were from the actually box the transmitter came in. Website says low power is 100mW but the actual transmitter when it arrived and I opened the package says low power is -48dbM (far less than 100mW). Again this is the revised transmitter with reverse threaded TNC connector.
On my website's Part 15 page I have a column of transmitters where much information can be found.
Also, the ALPB has started a growing collection of transmitter manuals and data sheets thanks to Jeff Station8.
http://thealpb.com/equip-info.htm
Undefaced by water marks.
I want to do some reading myself about
the transmitter mentioned above by Mr. Legacy.
What is -48 dbm in milliwatts or fractions of milliwatts?
I should know how to convert but I forgot and don't
have the references.
Thank you for starting this thread.
Very best wishes
Brooce, DOGRADIO etc.
Here are some other FM transmitters that I've used.
The Decade MS-100. Excellent quality, built well, probably can be considered the cadillac of all the certified FM transmitters. Both Industry Canada (RSS210) and FCC certified. Transmitters shipped within Canada can be tuned for the BETS standard of 1000uv/m at 3 meters. I believe the list price is around $700 for a mono one but you can buy for less. Sometimes they show up used on e-bay for a fraction of the new price.
Landmark FM-350. Both Industry Canada (RSS210) and FCC certified. Good quality, good sound, built-in power supply and industrial grade CD player. Can operate in either stereo or mono. Discontinued & hard to find (if not nearly impossible).
Broadcast Vision made a series of FM transmitters targeted at gyms and other such establishments. FCC certified. Reasonable quality and sound, stereo only. I don't know if they're still made or not. Can sometimes be found used on e-bay for around $100.
Panaxis ACC-100. Mono or stereo FCC certified transmitter. OK quality and sound. I had problems with hum on mine until I threw away the supplied wall wart and replaced it with a much better one. Discontinued but you can occasionally find them used on e-bay, sometimes for $50 or less.
I've put them in order of my preference. Unfortunately, only the Decade is still made. I still own one Decade (mono) and the Landmark.
Hi ArtisanRadio: Here is information on the Panaxis ACC-100. Mono or stereo FCC certified transmitter,Discontinued but you can occasionally find them used on e-bay, sometimes for $50 or less.
Let me corrected you on the panaxis acc-100 fm transmitter & stereo generator.
I found out while working on a panaxis manuals that panaxis company was bought by progressive concept back in 1990 and they own the copyrights.
I have talked to the president of progissive concept to comfrim this and he has given the alpb written premission to put some of panaxis manuals on our web site.
Progressive concept will NOT allow use to put the panaxis acc-100 fm tx and the fm stereo generator manuas up do to they still make both of these products and you can purchase from progessive concept.
So if you would like to purchase the panaxis ACC-100 fm tx and the fm stereo generator please contact progressive concept.
http://www.progressive-concepts.com/
Can find it under part 15 fm transmitter
I hope this clears some items up
station 8
Thanks for the updated info. I wasn't aware that they were still made. Bet you they're a lot more than $50 new, though.
One transmitter I haven't noticed mentioned is the EDM.
Brooce MICRO 1690/1700 Dog Radio Studio 2 WIFE 750 tells us that the EDM is an excellent and highly rated transmitter.
I got a link so we can see it:
About the EDM - I have had no personal
experience with it and I'm 99 percent sure
it's not certified. I have just heard tons of
good things about it. I would rather have
a certified transmitter.
I'll probably listen to your station tonight.
Especially overnight when you are running
the (creative commons) book reading shows.
It will go out from my Maxell at 88.3. As
we know - the Maxell covers the house great -
but I would have to put it outside for anyone
else to hear it - so it will just be me listening.
Me and the dogs.
Bruce, DOGRADIO
So far so good, keep the information coming in.
Bruce.
The EDM appears to be something of a kit, so I guess it couldn't be certified. But it sure looks interesting.
Right, tonight on "Radio Books" we will hear a reading of "The World Set Free" by H.G.Wells.
Maybe someday we'll read about "Part 15 Set Free." The watchful jail guards will be out of a job.
Got to go now, busy evading things.
I had an EDM and played around with it a bit. Mixed feelings about it.
First, it's way too powerful, even for Canada. When my Decade was fading out, the EDM was still strong. You might be able to create a mismatch on the antenna to reduce the field strength sufficently for Canada. But I don't know what that would do to the output transistor if you used it for any extended period of time.
It's really, really sensitive to hum from the power supply (there's no on board filtering, at least in the one I had). You have to use a well regulated power supply. Luckily I had my amateur radio supply; I even had issues with regulated wall warts (I guess they weren't regulated enough).
If you can eliminate hum, it sounds really good. But I did notice that it did bleed onto adjacent FM channels more than other transmitters, even at a distance. When I'm running the Decade at, say, 103.9, I can tune my car radio to 103.7, or 104.1 and hear another station there (weak, but they're there). With the EDM, at the same distance, those stations are obliterated.
Even ignoring the fact that using one wouldn't be legal, I think that there are better alternatives (albeit more expensive, but you do get what you pay for).
I've read about some of those issues. Funny that the SainSonic costs far less and you don't get that sort of issue unless your right on top of it and that is only at high power. Its the fault of the EDM transmitter from what I see.
Another undocumented discovery, by simply adding a length of wire to the C.Crane certified FM transmitter it is possible to match BETS field strength.
Of course there is no way I could know this on my own without exceeding 15.239 which would bring the Rulebook Thumbers and Stone Throwers, so I had it independantly checked by an anonymous individual at an undisclosed location.
There is also the variable pot I assume is for BETS but it would have to be compared with the Decade. How is the harmonic and spur issues? Does the C.crane wipe out the dial on high power like the Whole House FM transmitter 3.0?
I suppose it wouldn't hurt for everyone to add a band pass filter into the transmitter to help prevent out of band spurs and harmonics.
Ramsey has a filter kit that can also be bought already assembled that can be placed inside the transmitter cabinet just before the output stage goes to the stock antenna or rubber ducky.
Has anyone tried this on these various certified FM transmitters?
Has anyone tried this on FM transmitters kits?
If so, please share your way of using this filter, whether it was internally installed or externally installed in the transmitter's antenna feed line.
Did it clean up any issues with out of band interference or spurs?
If there is proof this filter or ones like it actually work, perhaps we should all install one in our FM transmitters to go that extra mile to prevent unwanted interference.
http://www.ramseyelectronics.com/FM-Low-Pass-Filter-Kit/dp/B0002NRJQS
Bruce.