I sure didn't know any of this.
Very good stuff.
Brooce, DOGRADIO
The Sainsonic was certified. But then a little while ago they applied to get that certification revoked, and they stated that they had not sold any transmitters in the U.S. It's my guess that is why the certification is not in the FCC database. A lot of this info can be found at the Radio Insight forum.
Their website says 100mW-500mW when in actuality when I got the transmitter it was -48dbm low and 500 mW high power. Im sure when the transmitter is recertified with the same FCC identification number it will have information to reflect that. That transmitter design has been changed and the box and manual reflect that but the website does not have all the correct information. This is probably why they requested to have it removed so that they can get the information correct. It would not make sense to certify a transmitter that is not sold in the United States. So that's not the reason I think the reason is that the information was cross reference and did not match. They have to get the information 100 percent right. So on the website its still saying 100mW-500mW. There is no reason for them to make a Transmitter at- 48 dBm. Unless they intended to have it certified for part 15 rules. Its very confusing to the public because there has been more than one version of the sainsonic Transmitter. So I see 3 versions so far. This is why there was a problem with certification because the unit in question all looks the same but there are differences in them. One very important one is the low power setting. Trust me this is very different from the version with the BNC connector. FailSafe's CZH-05B also has a TNC connector but the low power is 100 MW and not - 48 dBm for the low power setting. Both these Transmitter are made in China by the same distributor who distributes to different retailers with different brand names This is why they needed to get the the informa updated properly.
First of all the name sounds like "Saint Sonic." Wow, a Catholic FM transmitter from the Vatican!
The confusion over different versions and certifications reminds someone of that AM transmitter that had 300' of coax and a remote ATU (Antenna Tuning Unit) that flowed against normal Part 15 logic.
Back when that transmitter was the buzz of the forums there were members who desperately posted "Can't we talk about something else?"
It hasn't reached that point yet with the Saint Sonic, but that other transmitter finally got removed from certification and vanished into history.
No reference issue. I have been working with the FCC for years. Sainsonic ONLY has the items you found on the database. If the site does not end in dot.gov you are getting hosed. Typical of Chinese crap as they plagiarize whatever they can!
I will admit there's a lot of fraud coming from China on the Internet however in this case this Transmitter is not crap it's just that the way they try to represent it might be a little bit fishy. It is a well-built unit and at the - 48dbm setting you are obeying part 15 fm rules. And since the Transmitter used to be certified I don't think you're breaking any laws by owning it. You're just going to have to be careful with it and don't do anything stupid. The low power setting will get you a few feet away from your house and that's only on a good radio as if I sit between the transmitter and Radio there is fade just like typical part 15. It is compared to the Whole House FM transmitter 3.0. I don't think the unit is bad if I did I would had sent it back. Im not sure the C. Crane has 75 Us pre emphasis. Do what you will but this transmitter is the same as a Decade CM-10 and me being disabled I cant afford $200. I thought I got a good deal.
I don't know why you're getting your knickers in a twist over this, John.
There's a thread over at Radio Insight on the Sainsonic in the Community Radio section. They did have something certified at one point, and then asked for the certification to be rescinded. I don't know whether it was this transmitter, or something else, and others are claiming something else, but like anything Part 15 FM coming from broadcasters, I'd take it with a grain of salt, as there was no reference associated with the comment.
It appears that theLegacy purchased this transmitter in good faith, as Sainsonic is putting the certification number they did have on the box. Ultimately, it's up to the end user to determine whether or not they are complying with the rules.
I'm also not so sure that I'd call the transmitter junk without doing an analysis of the signal that it produces (and I don't think that has been done, at least that I've found). Saying that all Chinese transmitters are junk without having any data to back that up is just beng silly. The Decade CM-10, for example, is certified, is eerily similar to the Sainsonic, and comes from China. Has anyone done an analysis of the Sainsonic's signal?
And besides, nothing says a transmitter has to be certified to be USED. Only needs certification to be mass produced and marketed.
No knicker twisting here. 🙂 If you carefully reseach my posts I was refering to the phony FCC site the Chinese folks created. Also, I contacted Sainsonic a while back and they could make a special order with 75 uSec pre-emphasis but as shipped they were 50. A neighbor about a mile away has a Sainsonic. It goes way below the FM band as well as above. His is 7 watts with the same FCC ID as the that we have been chasing around. Huh?
But note that the CZH-05B can be a Sainsonic, Fail-Safe, CZHFM, FMuser, etc. You get the idea.
The Decade unit is manufactured by Artika. So I am guessing the others are knock offs.
I dont think anyone said that.
This computer is killing me.
Back to the thread, which is wonderful,
by the way. I'm disabled too. Most of
my vision is way over on the extreme left
side, and the vision that is there is not very good.
So here's why the Sansonic would be good
for me. The good digital display and the metal
case - i.e. - it wouldn't get pulled off of a table.
These plastic transmitters... Although I have to
say, the C Crane has been a VERY FAITHFUL friend,
as far as "electronic friends" go. It's over at another
Part 15 station on the other end of town. I lent it and
a mixer board out. I've had it for 10 years or so.
What worries me about these things coming out of
China - how do you really know what production run you
got? Maybe the RF out has a big spike in the 108 to
136 MHz aircraft band.
There were a bunch of other things I was going to
say - but that will have to wait for another later
post.
Best Wishes to All,
Brooce, DOGRADIO
that has been on this board in a while.
By the way, I'm disabled too.
You know why the Sainsonic is so tempting
to me?
The metal box and the fact that it won't get
pulled off of a table. Also the digital display
that I can see. I'm legally blind. The vision
that I have is way way over on the left side of
my head. (Oh yeah, there's the low price too.)
Anyway, though - I get uncomfortable unless I
can see the RF output on a spectrum analyzer.
How do I know I got the right production run?
How does the distributor know?
Somebody said not too long ago, "Gosh, what a
dumb thing it was to put the FM broadcast band
next to the aircraft band - whose idea was that?"
If I got the wrong production run - the thing could
have a spike on Bradley approach (the local big
airport) or something. That would be BAD.
As a ham operator I learn stuff like that when I
was a kid. o
another one.
There might be part of a post that
got up on the board. It's not proofread.
I'm just going to leave it there.
Best Wishes,
Brooce, DOGRADIO
they both say about the same thing.
You can take one out if you want.
I guess I've hit my limit here.
Best Wishes,
Brooce, DOGRADIO
MICRO1700: I only see out of my left eye. I can tell light from dark on the right eye and sometimes see movement. My issue is the optic nerve. I have tunnel vision out of the left eye and read with an 8X magnifier as well as use the magnifier in Windows 8 (modified to look like Windows 7 with Classic Shell). It was the reason that I bought the Sainsonic. Sometimes I drop things and it was one of the reasons the transmitter I had in Michigan blew out. I didn't notice after I bumped it that the antenna had came lose and when I powered it up all was well till I walked out of the room and the connection lost good contact. When I came back I smelled something and noticed I was no longer on the air. The transmitter had fried. So before I bouht the Sainsonic I wanted to make shot gun sure the antenna had a good connection. Even those BNC connectors had issues with being lose and could cause a transmitter's final to melt. When I noticed you had to screw this connector in I said "This is the one I want!" and done some more reading. Now after I placed my order I quickly asked for the 75uS pre emphasis but I have no way to verify its true 75uS other than James saying "Yours is 75 uS pre emphasis No worries." It does have a slight more base than other stations BUT NOT SO IT SUCKS HOWEVER but you can tell my station is not pro at times because it doesn't modulate the same way and I also don't push the modulation. James had told me not to try and make it as loud as a regular station or I'd overmodulate the transmitter and eventually cause the audio circuit to fail. He also reminded me that missuse is not covered in warrenty. And for those who are thinking of transmitting without an antenna Never Do That!! Some of the transmitters without finals you may get away with it but still I'd not do it. Now there is a HLLY transmitter with a variable 0-1 Watt and I thought of buying that it was the TX 01S but didn't get any reviews of it and I was afraid of harmonics. And by the way speaking of watts I found that -48dbm equals 15.8 Nano Watts. I think I read where someone said the Whole House FM Transmitter 3.0's part 15 setting is 18 Nano Watts. So the part 15 setting should be true part 15 as far as that goes. We all know the high power end in the USA is gray and even if you do deside to do it if you live in a Metro area its gonna get you busted really quick as the experimenter I know told me it would go 1/4 mile at that level. If your in a metro area at that power level you're gonna get a complaint from an NAB station or possibly a Ham operator who is trying to win a tranceiver from the FCC. So especially in those areas you want to stay at -48dbm or 15 nano watts. And that 7 watt transmitter your talking about gets really Hot. Temperature wise I mean by Hot! the fan inside is cheap and will fail quickly. The antenna it comes with is telescoping and will transmit more than 20 miles Inside Your House on the second floor (Per Youtube Test Video). Bad reviews of this transmitter even came from Amazon and Youtube itself due to the poor quality of the circuit of this transmitter. SainSonic won't sell it on their site and James and I had a talk about that unit. It was never supposed to be sold in the USA but Amazon is selling it and one person got injured due to the heat that transmitter puts out. 7 Watts Really? That is some crazy insane power to try on an inside antenna! Someone is gonna get a nasty RF burn when they accidentally tuch the antenna while their transmiting on High Power. I bet they'll never do that again. I did that once on a CB and I never done it again lol. The wash out over the dial I bet is more than 150-200 feet I bet the first time someone done that for an hour they are gonna have the feds at their door with a bettering ram and guns drawn. Stupid insane I say. Even at the 1 Watt level that transmitter got Hot as well. It just sounds like pure junk and that is what gives all Chinese transmitters a bad rap. Some are POS's like that one.