G
georgetown3ham
Guest
I purchased the JVC HD Radio about a month ago. I put it in my 2002 Ford F-250 Powerstroke. I don't have any local HD stations yet, though there is one about 20 miles north of me, a class A. I have also listened to one from Wilmington, Delaware as well as a non-com class A in Dover, which repeats a Philadelphia station. I also took a trip to Williamsburg, Va over the holidays a listened to several Norfolk and Richmond stations. Here's why I've heard:
1) AM sounds better and stronger, I can receive even lower power major market station at a distance of 80-100 miles (from the Washington area: 570, 630, 730, 980,1160, from the Baltimore area: 750, 860, 1010, from the Philadelphia area: 610, and even 830 from the Allentown, Pa. area.) Note, I live and travel in souther Delaware and the Eastern Shore of Maryland.
2) FM analog sounds great, excellent selectivity. Here's an example: I can pick up 97.7 Milford (Runs HD) and dial down to 97.5 Salisbury or up to 97.9 Crisfield without any interference. We have a a large number of Class A's, and very few class B & B1's. This is because of how close we are to the majors.
3) HD FM reception is about 75% of the analog signal.
4) HD 2, some sound great, other like 89.5 in Norfolk have poor audio.
5) FM HD sound a little better than FM, or course no hiss. AM HD, when received sounds excellent. I pick up WCAO Baltimore (Gospel) and WOR New York (Talk), but as you travel both change back and forth.
6) Here's an idea, since the original purpose of the AM Clear Channel's (Stations not company) was to service large areas at night, and since with the growth on both AM & FM into most areas of the country, lets ask the FCC to try an experiment. First, pick a couple of am frequencies one low, one mid band and one high (670, 1080 and 1530 for example). Now why not try allowing daytimers on those frequencies to operate at night at say 10% of daytime power. Lets see exactly how much interference there really is! Measure the signal in both the primary coverage area both the 50,000 watt station and the daytimers. Next lets try the same thing with HD on and check interference in the primary coverage area of the adjacent channels (for example: 660 in New York and 680 in Baltimore, etc.) Finally, lets drop the Class A's to 25,000 watts and measure the same thing.
My point to this is, the original rules go back to the 1930's, with dsp we may be able to change the rules, with out providing a significant amount of interference, while giving may local communities (Example: Chestertown, Maryland) full time local service, without again significantly affecting the 1530 in Cinncinati. This could be a way to help daytime, reduced power am's with out translators, and give major major am's HD 24 hours a day.
1) AM sounds better and stronger, I can receive even lower power major market station at a distance of 80-100 miles (from the Washington area: 570, 630, 730, 980,1160, from the Baltimore area: 750, 860, 1010, from the Philadelphia area: 610, and even 830 from the Allentown, Pa. area.) Note, I live and travel in souther Delaware and the Eastern Shore of Maryland.
2) FM analog sounds great, excellent selectivity. Here's an example: I can pick up 97.7 Milford (Runs HD) and dial down to 97.5 Salisbury or up to 97.9 Crisfield without any interference. We have a a large number of Class A's, and very few class B & B1's. This is because of how close we are to the majors.
3) HD FM reception is about 75% of the analog signal.
4) HD 2, some sound great, other like 89.5 in Norfolk have poor audio.
5) FM HD sound a little better than FM, or course no hiss. AM HD, when received sounds excellent. I pick up WCAO Baltimore (Gospel) and WOR New York (Talk), but as you travel both change back and forth.
6) Here's an idea, since the original purpose of the AM Clear Channel's (Stations not company) was to service large areas at night, and since with the growth on both AM & FM into most areas of the country, lets ask the FCC to try an experiment. First, pick a couple of am frequencies one low, one mid band and one high (670, 1080 and 1530 for example). Now why not try allowing daytimers on those frequencies to operate at night at say 10% of daytime power. Lets see exactly how much interference there really is! Measure the signal in both the primary coverage area both the 50,000 watt station and the daytimers. Next lets try the same thing with HD on and check interference in the primary coverage area of the adjacent channels (for example: 660 in New York and 680 in Baltimore, etc.) Finally, lets drop the Class A's to 25,000 watts and measure the same thing.
My point to this is, the original rules go back to the 1930's, with dsp we may be able to change the rules, with out providing a significant amount of interference, while giving may local communities (Example: Chestertown, Maryland) full time local service, without again significantly affecting the 1530 in Cinncinati. This could be a way to help daytime, reduced power am's with out translators, and give major major am's HD 24 hours a day.