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1310 KEIN - Seeking AM C-QUAM and HD
- Thread starter 13KEIN
- Start date
Implementing AM Stereo in 2025 is a waste of time and money. No one in your audience is going to buy 30-40 year old car or home receivers on ebay or elsewhere that may or may not work, just to listen to your station in AM Stereo, no matter how much they say they will.
AM HD is less of a waste of money, since some in your audience might actually listen to it in their cars.
That being said, if you're still set on doing both, you might contact one of these stations listed as being in AM Stereo and see if they still have the equipment, even if they've turned AM Stereo off:
I live in a community where most of the community had the receivers and they still work even today. We have a amature radio club that's asking for it. I figure why not. I can buy a new board for not that much but id rather source used.
The HD too.
How old are the people in the amateur radio club, how big is the club and do they listen to the station?
Contact Matt Krick KYET-AM
Some HD Radio receivers support C-Quam AM Stereo and some don't. It sometimes depended on the firmware revision of the model you got. HD Radios rarely have a stereo indicator for either AM or FM, so you just have to wait and listen if it opens up to stereo when you tune in the signal.
Since virtually all modern radios are DSP-based (even if they have "analog" tuning), there would be no extra expense to add support for C-Quam. It's just a matter of convincing the manufacturer to add the few extra lines of code to support it. Or, more usefully, also some code to add wideband audio, NRSC de-emphasis, and noise blanking, to bring it up to AMAX specification.
Since virtually all modern radios are DSP-based (even if they have "analog" tuning), there would be no extra expense to add support for C-Quam. It's just a matter of convincing the manufacturer to add the few extra lines of code to support it. Or, more usefully, also some code to add wideband audio, NRSC de-emphasis, and noise blanking, to bring it up to AMAX specification.
Did you ever turn on C-QUAM? If you ever do, you'll want to report it to
AM Stereo Stations
www.meduci.com
which, as as far as I can tell (please tell me anybody if you disagree) it is the best listing of worldwide C-QUAM stations there is.
I can receive your station here in Saratoga, CA at night, though I doubt I could decode the C-QUAM signal if you added it ... but I would love to try.
Wait, you're in Saratoga? You do know there's a 1310 in Oakland, like 850 miles closer than KEIN in Great Falls, Montana. I realize you're on the hairy edge of KMKY's fringe signal at night, but KMKY and KEIN are putting out the same power on the same frequency, and Great Falls is not directing its signal at the South Bay.
There are lots of such unusual cases, known mostly to AM DXers. My favorite from my long abandoned location in Cleveland, OH, was 1600 WKWF in Key West, 500 watts but very often dominant on a crowded channel in the evening. There were several others, but that was the most dramatic.
In the past couple of years, KMKY has had extended periods of silence, which has made receiving KEIN easy for me. Even with KMKY on, it is possible for me to fish out KEIN, but indeed that almost certainly makes decoding AM stereo from a potentially C-QUAM-enabled KEIN a pipe dream. Lucky to even see the 25Hz pilot tone, I imagine.
It's probably one of the few listings of worldwide AM Stereo stations. It still has KDUN listed despite that station going off the air nearly a year ago.Did you ever turn on C-QUAM? If you ever do, you'll want to report it to
AM Stereo Stations
which, as as far as I can tell (please tell me anybody if you disagree) it is the best listing of worldwide C-QUAM stations there is.
I can receive your station here in Saratoga, CA at night, though I doubt I could decode the C-QUAM signal if you added it ... but I would love to try.
I am veering firmly into "a sideshow of a sideshow" territory here, but I am annoyed now -- at the FCC I guess?
While the evidence for KDUN (website gone, nearby websdr's see nothing at 1030kHz) being off the air is clear enough, the FCC shows it to be licensed and operational. Not even "silent". The Wikipedia entry for KDUN states that "The FCC cancelled the KDUN license on May 19, 2025", but fccdata.org/?call=kdun shows the FCC granting a license to cover on 5/28/2025 and no applications since to contradict this. I suppose a clue to KDUN's true status is that the license to cover document is for "DKDUN". Granting a license to cover for a deleted callsign (which has yet to be actually deleted) makes no sense to me.
As far as the FCC has any idea, KDUN *is* licensed and operational. The "DKDUN" was from a previous issue the station had in 2002, as best I can tell.
If a licensee doesn't tell the FCC it's gone silent, or request deletion of the license, there's nobody at the FCC scanning the dial to check who's on and who's off. Unless someone else files a complaint or petitions to deny a license renewal, it just sits there on the books, with the risk of an eventual fine if the FCC catches up with the station later on.
There are probably quite a few stations that go silent without any FCC notification. Here in Houston KJOZ has been off the air the past six weeks without any sort of related filing with the FCC. And there is an LPFM here that has been off the air for over two years, also without any notifications. A few other local LPFM haven’t been heard from in a while. No notifications; some station owners simply turn off the transmitter and slip away into oblivion.