Radioosophy HD100 According to amstereo.org this Radio will decode C Quam. Although discontinued I found this Radio for $59 on Ebay brand new. I may buy it to monitor our new C Quam AM Stereo transmitter we're getting for The Legacy.
Sangean HD-1 According to many forums I've googled I find this to be the case. Its available on Ebay.
Sangean HDR-16 This Radio is an Album Rocker's dream and at $99 it should be great. I found this on Walmart's site to store and I've heard the reception is great. This Radio is a maybe decode on the C Quam so if I buy it from Walmart I can take it back if it does NOT. Again if they use the same chip as the other Sangean Radio's that do decode it I can believe it will. Forums say on the Sangean C Quam capable HD Radio's the Stereo indicator will come on so my C Quam transmitter should be decoded with that Radio.
The Legacy is working HARD on Album Rock resurrection schemes and the True revitalization of AM starts with C Quam AM Stereo. All part 15 stations transmitting music should be working hard on getting a C Quam AM transmitter along with Audio Processing to make AM a listenable experience.
If you know more receivers please post them here and on The New Radio Revolution where we will revolutionize AM Radio once again!!
I don't have any of those, but I'd been looking at the Sangean HD-1 a few years ago. I have several car radios that do C-QUAM and I can put them on a 12 volt bench supply to use them out of the car. I have an old Radio Shack tuner that sounds very good.
I got a Directed DHHD-1000 bookshelf system that was supposed to be able to get C-QUAM AM stereo, but my version doesn't.
It was used and came with no documentation or box, so maybe it's for use in another country and stereo disabled, I don't know.
It's good to be able to monitor in both AM mono and stereo, so you can see if the mono signal is okay as well as in two channel mode to see what your separation is and if you're getting both channels through, and with proper left and right.
Another thing that can be done with a decent quality mono tuner is to get a C-QUAM decoder card to retrofit the tuner for stereo. Meduci makes one for less than $30, and it goes between the final IF stage and left and right audio outputs, and acts as the detector for both mono and stereo, and it also has the stereo LED indicator driver as well. The add-on card is something that would be installed by a technician who is familiar with tuner circuitry, though it shouldn't be that difficult.
No I haven't tried the HDR-16, and I'm surprised that Walm even has it. I see that's an order-to-store deal, going by your post.
I'd all but given up on looking at radios at Walm, at least the ones in the store, in that section that had the cheap CD players, cassette decks, phone docks and portable radios, all end of line products.
To think they have what seems like a nice radio, even if it's on line, that's pretty good of them, and in a place where many people shop.
We'll have to check the Sangean's status and look for reviews! It might be hard to find independent reviews, or even someone who has tested it on AM stereo though.
Post by Druid Hills Radio on Jun 1, 2018 13:14:47 GMT
Look, AM stereo was a flop. I live in the top 20 radio market in the U.S. Nobody broadcasting in stereo. The list I found show 92 stations in the states currently broadcasting one of which is WLS. Why would a 50KW blowtorch that's News/Talk transmit in stereo?
High atop the "Druid Hills Communications Complex" overlooking the unwashed masses of Dade City and eastern Pasco County, FL. 73 de WA4JM
WLS broadcasts in HD AM during the day, then to avoid causing interference to adjacent stations, as HD will be inclined to do, they switch to analog C-QUAM stereo at night. HD radios that pick up the digital day signal might then switch to analog stereo at night that way.
On a radio station tech webpage, an AM stereo engineer gave his reason for broadcasting in stereo, even as a talk station, it's because some radios will open up their IF bandwidth in the presence of a stereo pilot, making for a cleaner voice quality and also imaging and produced ads can have more impact.
My CC station is in stereo right now in Beta, that means it's fully working but I haven't put the stereo exciter card in a box yet, it's laying on a dinner plate in the transmitter room.
You're right, the industry dropped the ball on AM stereo, and it's a shame, it's a technology that really works. As with any more esoteric topic out there, there's enough misinformation, even from prized engineers that people listen to and accept, so if you're interested, study it.
I noticed that the UK is now getting interested in AM stereo, since they have community AM licenses these days. It wasn't approved there in the past, but a new station playing music from India tested C-QUAM early this year. They really don't have stereo radios in Britain, but several people heard it via SDR (computers with radio software) at 70 watts.
Oh my IDs are going to be slamming a.m. mono real good. I will be doing a plug your nose and this is what AM sounds like right now and then unplug my nose and play it in stereo Plus I will be showing songs such as The Mamas & the Papas California Dreamin as part of the C quam demo.
Another thing I will be doing in my IDs is I will be saying some people talk about am revitalization the Legacy does something about revitalization. Check our website out for a total list of C Quam radios. Don't be stuck on AM mono [baby cries] be a winner and a true album Rock Warrior and buy your C Quam radio today.
The Legacy will be showing all AM mono stations what a big mistake they're making by not being in C quam AM stereo.
C-Quam will not make a comeback. Presently (if the list is up to date) 1.9% of AM stations in the country are broadcasting in C-Quam. I'm sure the listener base is an even smaller percentage. SAles of stereo AM exciters are zero. If anything is to change in the foreseeable future it's going to be digital AM, like it or not.
The general public is not going to go out of their way to find a C-Quam receiver. Your list showed three available. Two come up as discontinued by the manufacturer, and one makes no mention of it's ability to decode C-Quam stereo in it's own instruction manual or specification sheet, and no ones web site offering the radio for sale mentions that it's C-Quam compatible, so a random every day shopper isn't going to discover it as a compatible receiver, and won't care because there's no station near them to listen to, odds are. I checked on a few random stations on that list of 92 using C-Quam and they were no longer using C-Quam, or had changed ownership, call letters, or frequency and have dropped C-Quam as part of those changes. I doubt anyone has fired up a new full power C-Quam in the last 15 years. And remember that C-Quam has it's own list of issues and problems even at it's peak of "popularity" (if you can call it a peak). When that AM stereo gear that was installed 20+ years ago goes on the fritz and needs replacement no station manager or GM is going to spend the money to keep that obsolete format going.
I think it's fine if folks like to experiment with C-Quam. It doesn't hurt anything and people with normal radios (99.999999999999% of the public) can listen just fine as well. But the idea that it will make some sort of comeback and revitalize AM is just not going to work out. They tried once and failed, and now with digital HD on the horizon there's no chance the industry is going to go backwards.
Incidentally, all those rock classics from the 60's? They became hits and million sellers from teenagers listening to them on mono AM radio, and buying mono 45 rpm records by the millions. I grew up listening to "California Dreamin" by the Mama's and Papa's on KDWB 630 AM in Minneapolis in glorious MONO. And have my Mono 45 on the shelf. Mono does NOT make you sound like you have a plugged nose, BTW.
Virtually any format anyone wants to listen to is available over the air. Heck even in my small town in northern Minnesota I can choose from three classic rock formats, two oldies formats, God only knows how many country formats, a couple classical stations, three public stations, a jazz station, several "adult contemporary" stations, several talk stations and a couple teenybopper rap/hit radio stations. Oh, not to mention 3 Christian stations and even a Native American station! --- and I'm 200 miles from the nearest city! And of course damn near any station in the country is streaming now and readily available on a live stream anywhere in the world. Bringing back any sort of format via Part 15 is not reality and trying to sway listeners with an outdated form of stereo broadcasting with no mainstream consumer equipment available is just not going to happen. Offering a unique playlist (if that's even possible these days) coupled with very local (VERY local) information needs to be the focus. A big city station probably won't promote the local church bake sale, volleyball team fundraising car wash, or that 6th street is closed due to a water main break, but YOU can. And that's what makes your station valuable and unique to your local listeners. People can find a way to listen to any format. I don't care if it's classic rock or punk, or hip-hop. But the only place they're going to get very very local information is from a local station, and that may very well be your Part 15 station.
For a minute there I though about ordering one of those fancy Sangean radios that supposedly decodes C-Quam and trying it out. Research shows the nearest possible C-Quam station is 150 miles away and is a 250 watt station! So I'd have to take a drive to try it out. If they are even still using C-Quam. I've contacted them to find out.
No one (and yes there are surveys and studies that back this up) will say "I'm not going to listen to the classic rock station because it's in mono. I'd rather listen to the country station because it's in stereo". What they want to hear will trump perceived audio quality every time. Most listeners don't know or care about audio quality. That's why things like 8-tracks and mp3's were successful. Neither is known for quality. John Q. Public doesn't care. To think "well, MY listeners care" is a very small niche of people within another small niche.
OK, so I strayed from C-Quam into programming a bit there. C-Quam, even after all this extraneous typing, remains dead.
Acoustic events are all monaural in the natural world. A voice, an instrument, a bird, a dog, a car horn.
Stereo is what happens in empty space between monaural sounds. Stereo is the distortion that the passage of time puts on a mono sound as it reflects and moves away from its point of origin and mixes with other monaural sounds.
Lab scientists call monaural sound events "coherent sound". They call the stereo effect "incoherent sound".
Monaural sound is the most focused way to listen to musical instruments (including the voice).