radiotoday.com.au
The difference is when the Commission approved Magnavox as the AM stereo standard, Leonard started suing everyone. Since the FCC didn't think AM stereo was worth getting into a protracted legal battle over, they essentially said fine, let the marketplace decide. Electronics manufacturers approached Leonard about building ISB equipment if Leonard gave them skin in the game, but Leonard refused the help. Magnavox said screw it, the AM stereo business is too small, and Motorola and Harris were the only manufacturers left standing. Harris backed out of the competition, leaving Motorola and Kahn. Kahn's manufacturing was home brew, and he was trying to control everything including receivers (which no manufacturer wanting to get into bed with cranky Kahn).
It really is a shame though, as the concept had promise. I've heard AM Stereo "in the wild", and in good conditions (strong local station, manageable interference), it sounds quite good compared to regular AM. It still doesn't compare to FM, of course.
Doubtful. If AM stereo had any chance, it should have been introduced no later than the mid-60s. But I don't want to continue devolving this thread with comparisons of modern government regulation challenges to a failed modulation technique relegated to the dustbin of history. Consumers don't care about modulation techniques and only a handful of radio nerds even remember anything about its history. It's much simpler than all that. Consumers want content they want, and regulators want to regulate.
The point was David posted let the market place decide. That doesn't always work. We never found out if AM stereo would have worked because of a lack of standard. Where would FM be without a stereo standard? Would the public be served if there were multiple HD systems that didn't work with each other.
But that's the point; the FCC selected a standard in the early 80's, arguably too late for AM anyway. That standard was Magnavox. Once lawsuits started or were threatened, the Commission rightfully thought the juice wasn't worth the squeeze of fighting litigation over what amounted to a simple decision. Since the Commission didn't technically oppose any of the proposed standards, they let the marketplace, aka potential vendors, fight to the death.
The FM stereo standard was chosen in the late 50s. If an AM stereo standard had been chosen around the same timeframe, AM may have kept music longer, but there are still enough negatives with AM as a band that likely wouldn't have stopped the ultimate listener migration to superior FM.
There were several versions and large companies all working on IBOC modulation methods starting back in the late 70s. That included companies like AT&T. The Ubiquity method chosen was a combination of several after the original organizations bailed out, or sold out. Ultimately HD was a marketplace decision going in and what was left in the end was just approved by the Commission, except for DMR, which didn't try very hard in the States. Completely different situation than ridiculous AM stereo.
That's the reverse of what happens. Industry develops a design and tests it with the idea of solving a problem that might make the company money. Potentially their competitors do the same with a different or similar design. In the case of radio or TV, the government body has rules of how a modulation complies with existing rules for occupied bandwidth and protecting the public interest. If accepted, rules are then put into place to accommodate the new technology to incorporate it alongside legacy rules/technology.
Mainly because it came about thirty years too late. Even then, it was still inferior to FM
Yes, Delta is going to take a beating over their slow ramp-back-up. I get it, once they get the database back they've got to reposition a lot of aircraft and crews. It's just that their competitors were able to recover so much quicker.
Having your flight canceled sucks for whatever reason. The airlines do their best while trying to keep their shareholders happy. They've got consumers over a barrel because they own certain routes. It's no longer a matter of being upset at an airline because of service or a flight being canceled that one could honestly claim they won't ever fly an airline again. If you want to be a passenger on a route and don't want to pay a ton extra, your other options are driving, bus, or potentially train. But even trains get canceled or crash.
And RCA had the patent on color TV, but they licensed it to anyone who wanted to make it. That's why they weren't a monopoly.
You are confusing technology with monopoly. Very different.
By "self-regulation" I meant that an entire industry will dynamically self-regulate based on consumer acceptance and demand. I did not mean that companies should engage in collusion to control a sector.
But RCA licensed the technology because that prevented other companies from introducing different systems or standards. By licensing to others, they kept everyone in the same "herd".
We know your answer to anything related to AM is "turn it off and mail the license back to the FCC.
That's not true either. I never said such a thing.
But tying modern topics affecting thousands or millions of people to what happened with AM stereo? Come on.
Leonard was either threatening or was in the process of suing everyone who had anything to do with AM stereo. Kahn was an equal-opportunity offender.
Nor did they care. As I mentioned at least twice now, music listeners had long moved to the FM dial by the time factory AM stereo tuners started showing up in vehicles. My 1998 Jeep Cherokee was equipped with AM stereo, but there were no stations within my driving area still doing music, let alone broadcasting in stereo. Sometimes at night, I'd switch to AM, and the heterodyne of carriers beating used to trigger the radio to demodulate in stereo. All it sounded like was wide heterodyne. Woo hoo!
HD-1 has full frequency response up to 20kHz. Analog FM cuts the high frequencies at roughly 13kHz. Not noticing the difference in high frequencies are probably age-related hearing loss.
Correct, but back in the day you needed to use slide-rule capacitance-tuned radios to accomplish it. The idea to a nerd was cute, but pretty useless to the average consumer. The 'whole room' concept wasn't a thing in reality because all you're adding is a distance delay between two radios.
As I understand the concept, hearing sensitivity may be good at the sacrifice of bandwidth. Midrange frequencies around speech are highly focused because the overall range at the other ends of the spectrum is less. Speaking to an Audiologist once, she mentioned that most people have sensitivities to certain frequencies over others. Those sensitivities change as one ages.
And I don't think having choices in the way one consumes media and entertainment is a bad thing. But, to assume it would all stay the same as back in one's youth, or that it's the radio industry's fault when more competition moves in, is in my mind, a bogus argument.
The system that "worked well" had the two channels on the separate AM sidebands, requiring two identical radio equally spaced. That is hardly "worked well" to consumers. Yes, it did create true stereo, but it was difficult and complicated to use... well beyond the interest of average consumers.
The technology of the late 50's was primitive and tube based. It's really not comparable in any way to that of the late 70's. To do in the 50's with tubes what the various AM systems did in 1978 would have filled at least half of a full rack!
Different kinds of craziness. Kahn was just ornery and his fight to have his system selected delayed AM stereo to a time when AM for music was totally dead. In my opinion, Kahn single-handedly killed any chance of AM music formats being successful.
Computers allow health care providers to share information across the departments of large hospitals and other associated hospitals as well as among both "on campus" and other location physicians and health care providers. That means extensive test results, historical treatment and more.
