JOHN HOLCOMB II FURNISHED AIR CHECKS FROM HIS MEDUCI AMX2000 THIRD GENERATION AM STEREO TUNER
John Holcomb (the second) from The Villages, Florida USA shared air checks from WVLG(AM) Wildwood, Florida in February 2014. This demonstrates that mono AM stations sound very good when properly received on a high fidelity wideband AM radio!
John says, "Thought I'd send you a copy of this file here. Recorded from my AMX2000. As you know WVLG doesn't stream, and man [their] AM sounds excellent! Feel free to share on your website if you'd like to showcase an example of good quality AM. I can also get WLBE (which has less compression and more of a dynamic range). It is sure an unique listen in that you never know what will come up next." John is using his>>TERK Technologies Audiovox AM Advantage 1000 passive antenna. There is a 12-foot long cable connected between this Terk antenna and his AMX2000 tuner. This cable allows the antenna to be located far away from his mixer and computer- to obtain good naturally-sounding reception with very low audio distortion. John is are fortunate not to have much local man-made electrical interference in his central Florida reception area.
WVLG programs soft adult contemporary music format, playing songs from the 1950's to the 1980's. Ron Richards was spinning the records during this air shift:HIGH FIDELITY AM FROM WVLG(AM) IN WILDWOOD, FLORIDA USA (125MB)
Rob Nuton was spinning the records during these additional WVLG air checks recorded on February 4, 2014 from meduci AMX2000 tuner in WAV high quality uncompressed loss-less quality audio format:WVLG(AM) PART TWO IN WAV AUDIO FORMAT (73.8MB)
This has the Love Shack original length song track from the B-52's that was never played on radio stations back in the 1980's: WVLG(AM) PART FOUR IN WAV AUDIO FORMAT (56.3MB)
WLBE(AM) Leesburg-Eustis, Florida USA is another regular station favorite that is listened to by John Holcomb II--this time to the local Uncle Rusty program on February 4, 2014. It is a rarity for two locally programed AM music stations to co-exist in the same radio market these days! Again, this is in WAV high quality uncompressed loss-less quality audio formatting:WLBE(AM) PART ONE IN WAV AUDIO FORMAT (69.4MB)
John says, "A bit about WLBE. Last year, they hired a new PD to transform this station from a talk format to a hybrid of oldies/talk. They don't always have live DJ's, but I made it a point to record when there was one. They differentiate themselves from WVLG by leaning [to] older oldies. WLBE does stream, and the stream is in stereo. I remember last year on the radio discussions board there being talk of putting the station on in AM stereo, but if my memory serves me right, [they were] not being sure how to get the studio to transmitter link in stereo."
According to John, "Both WVLG and WLBE would sound excellent in AM stereo! I personally think that WLBE gives more accurate sound of what your tuner can do for an AM mono station. ... Your tuner proves in these [audio] samples that yes, AM can sound good, and engineers do care about what goes on between the speakers. After all, this is an audio medium. Formats on AM not only need to have good content, but the manufacturers of the receivers need to do their part too."
John says, "A little more about my setup. I have your tuner running into a Numark mixer, which is connected to a Behringer U Control UCA222- which runs into my Dell Inspiron E-1705 laptop running Windows XP. I've recorded this in Sony Sound Forge 8.0 in *.wav format, before editing and saving it." This is an incredible listening experience from two mono music AM stations. Thank you for taking the time and making the effort to share, John! WVLG and WLBE chief engineers and owners should also be recognized for their achievements. Just imagine the extra dimension and wide musical separation if these two stations were broadcast in C-QuAM stereo!
TAKUYA KADOWAKI PROVIDED TWO AUDIO FILES FROM HIS MEDUCI AMX2000 TUNER IN JAPAN
Takuya Kadowaki shared two air checks, as recorded from his AMX2000 tuner in Japan in July 2008. Please listen and let us know your thoughts:AM STEREO IN JAPAN FILE ONE (3.4MB)
MEDUCI PRO1k TUNER WAS INCLUDED AS PART OF THE ROBB RADIO SHOW AND "THE MIGHTY 1630 KCJJ" AM STEREO BROADCAST
Courtesy of Colonel Tab Patterson, Robb Spewak, Captain Steve (Soboroff) Bridges, and KCJJ-AM, listen to the "Robb Radio" show recorded live from Coralville, Iowa USA. This was a four-hour music program that originally aired on November 5th, 2010. Tab used his meduci PRO1k tuner approximately seven miles from the KCJJ transmitter location to receive the show in full C-QuAM stereo with very wide stereo separation being evident. Your ears are in for a very nice treat! You can download the entire show at once, or get it in one-hour time blocks>> Robb_Radio_Show_110510
This direct off-air recording from KCJJ demonstrated how well analog AM stereo rules, and showed the full potential for C-QuAM stereo fidelity. This is despite NRSC-2, and the other restrictions being placed on the transmission technology. To hear the entire 201-minute show (provided that you have a robust Internet Service Provider capable of uninterrupted downloads), you can save the entire MP3 clip from this link>> robb_radio_20101105_entire_TRSS_November5_2010_CQuAM (378MB)
Robb Spewak enjoyed spinning the records live in the River City Radio KCJJ studio. Music selection ranged from the Beach Boys, the Offspring, Jerry Reed, the Moody Blues, to Bad Company, and other musical groups ... there was true variety, keeping in line with the KCJJ format. You may remember Robb as the third wheel on the "Don & Mike" show for many years. Captain Steve recently celebrated his golden fifty year anniversary in broadcasting. He started at 16 years of age on WGEN(AM) in Geneseo, Illinois and worked at stations in Muscatine, Iowa, Waterloo, Iowa, Chicago, Des Moines, and the Quad Cities, and has owned KCJJ since 1994.
INSIDE THE FIRST SIMPLIFIED PROTOTYPE MEDUCI PRO1k AM STEREO TUNER:
TAB PATTERSON RE-VISITED KCJJ(AM) WITH A FIRST-EVER HISTORIC QUADRAPHONIC RADIO BROADCAST CAPTURED USING HIS MEDUCI PRO1k TUNER!!
On April 14th 2011, Tab Patterson again visited the Robb Spewak Show on KCJJ in Coralville, Iowa USA and made radio history with his successful Quadraphonic Radio test over C-QuAM stereo technology! This clip >>from USTREAM contains the direct live audio feed from the studio, as well as video taken from a stationary camera. Quadraphonic test begins at approximately 30 minutes into this video stream. Remember that left and right channels are reversed on the USTREAM feed. You can also watch Tab Patterson's video that takes the over-the-air sound recording from KCJJ using his PRO1k tuner. This video demonstrates how good AM stereo can sound, with very wide separation, and very low total harmonic distortion being present! To properly play this video, connect your computer to a Dolby Pro-Logic receiver and set the decoder to the "music mode." You should hear very defined vocals and musical instruments move throughout all four speakers. This was a 12-minute long experimental broadcast to see if Quadraphonic Sound could indeed be encoded, transmitted, received via the PRO1k, and successfully decoded (using Dolby Pro-Logic II) back into true Quadraphonic Sound, and four discrete audio channels, using conventional AM analog broadcasting technology. This proves that it is possible to get surround sound using an AM radio signal. First click on this link to be taken to another web page to listen to the Quadraphonic broadcast>> Robb_Radio_Show_Quadraphonic_MP3
Tab was roughly seven miles from the KCJJ transmitter (actually in back of their on-air studios on Quarry Road) inside his pickup truck, using his PRO1k with his>>TERK Technologies Audiovox AM Advantage 1000 passive antenna), which he placed on the roof of his truck. It was windy that day, and the antenna was rocking back and forth. As the antenna moved in the wind, the antenna patch cable briefly lost contact with the Terk's 1/8-inch connector jack. This caused the received C-QuAM signal to briefly lose stereo lock twice during the recording. Tab believes that the studio structure actually helped block the adjacent AM iBiquity HD Radio station on 1600kHz from interfering with the historic Quadra-cast sound broadcast on 1630 kHz. Two of the three songs were directly played from quadraphonic 8-Track tapes in the KCJJ studio. The song from Chicago was encoded using the Rhino DVD surround sound release of the original Quadraphonic album. This is really pushing C-QuAM technology to its limits because the audio phasing has to be perfect! We hope the listeners enjoyed this Robb Radio Show special treat! Perhaps you were lucky to hear it live OFF-AIR from KCJJ using your Dolby Pro-Logic home audio system receiver modified with an AM stereo decoder!?!
Due to your e-mail requests, we now offer Tab's full 12-minute audio file (16-bit WAV sound format) that you can download to your audio file collection! This WAV file does not make use of any digital audio compression or resulting artifacts, therefore it is a large file. To save the file to your computer, you first right click on the file name called "KCJJ_Quadtest_PRO1K" below, then (depending on the functionality of your web browser), select "Save Target As..." then choose your destination for the audio file to be saved, then (depending on your ISP connection speed) grab a cup of coffee (or several cups)>> KCJJ_Quadtest_PRO1K (132MB)
Please note that you will not be able to stream this file from this web site. You should be able to save the file to your computer following the above instructions!
Sadly, KCJJ elected to discontinue their AM stereo broadcasting in November 2012. From KCJJ: "We could not justify sacrificing almost 15 percent of our modulation to a technology that isn't available anymore. It's sad, because it did work nicely, but our local coverage did improve, and we could no longer get service on the exciter. Thanks for listening. KCJJ Staff." Ironically, Robb Spewak said to Captain Steve (Soboroff) Bridges at the end of his 12-minute legendary quadraphonic broadcast:
Two mono AM stations have recently contacted us and will be converting their transmission plants to AM stereo in USA. We will announce new AM stereo launches at these two AM stations when they are ready. It seems that for each AM stereo station that falls, another one rises in its place. Stay tuned to meduci's web site for further updates! And please remember to promote AM Stereo at least ten times per day on your station -- in hourly station identification: call letters, followed by community of license, followed by the magical two words "AM STEREO" !! And regularly promote AM Stereo on your web sites, with the two words "AM STEREO" listed in your station logo! This promotion will make a big difference with your listeners.
AM STEREO BROADCAST MONITOR AND EXCITER SERVICE MANUALS ARE NOW AVAILABLE !
Courtesy of Josh Jones, complete service manuals are available for MOTOROLA MODEL 1300 C-QuAM AM STEREO EXCITER, MOTOROLA MODEL 1310 C-QuAM MODULATION MONITOR, DELTA ELECTRONICS ASE-2 C-QuAM AM STEREO EXCITER, as well as DELTA ELECTRONICS ASM-1 C-QuAM MODULATION MONITOR. Schematic diagrams and complete parts lists are also included for all manuals. You can download the combined Motorola 249-page service manual here>> MOTOROLA SERVICE MANUAL (34MB) . You can download the Delta Electronics service manuals here>> DELTA ELECTRONICS ASE-2 C-QuAM EXCITER SERVICE MANUAL (12.1MB) and DELTA ELECTRONICS ASM-1 C-QuAM MODULATION MONITOR SERVICE MANUAL (15.25MB).