RE: FM station frequency vs fidelity

Radio Road

Which tuner to get and getting the most from it. Thank God, for the radio!

74.72.246.129

Posted by Neff on May 17, 2012 at 17:46:03

In Reply to: FM station frequency vs fidelity posted by hitsware on May 15, 2012 at 12:30:45:

Eli is correct on comments. Some confuse 50KW transmitter with ERP (effective radiated power) rating. A gain type antenna multiplies a transmitters power thus ERP watts out is higher than the transmitter power.

VHF frequency band is basically line of site, but can travel a little further. The sunspot cycle at its peak every 11 years emitting solar flairs causing a reflective boundry in the ionsphere usually does not bounce back signals above 50-60 mHz, but once in a great while will reflect signals at 144-140 mHz. This signal reflection is not local, but is many hundreds or thousands of miles when reflected back to the earth. Weather temperature layers or called boundries can cause a local effect called ducting, but is also rare.

A 50KW output transmitter operating class D in FM requires about 75KW input (line voltage in). The electricity cost of that 75KW in NY is about $11.25 an hour or $270 per 24 hour day or $8100 per month. Double that cost on Long Island, NY.

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Follow Ups Full Thread

Topic - FM station frequency vs fidelity - hitsware 12:30:45 05/15/12 (13)

RE: FM station frequency vs fidelity - Maric 22:54:38 05/17/12 (0)

RE: FM station frequency vs fidelity - Neff 17:46:03 05/17/12 (0)

The difference will be entirely due to the engineering approach of the station. - Timbo in Oz 15:00:11 05/17/12 (1)

RE: The difference will be entirely due to the engineering approach of the station. - hitsware 12:14:33 05/18/12 (0)

RE: FM station frequency vs fidelity - Neff 16:08:16 05/16/12 (2)

"Quality of a FM station can exist anywhere on the dial" - hitsware 17:37:42 05/16/12 (1)

RE: "Quality of a FM station can exist anywhere on the dial" - Eli Duttman 18:27:47 05/16/12 (0)

RE: FM station frequency vs fidelity - 6bq5 16:59:51 05/15/12 (0)

RE: FM station frequency vs fidelity - Eli Duttman 12:35:49 05/15/12 (4)

RE: FM station frequency vs fidelity - FRG7SWL 08:05:35 05/16/12 (3)

RE: FM station frequency vs fidelity - Eli Duttman 17:30:48 05/16/12 (0)

Thanks for the (local) input ! - hitsware 11:02:20 05/16/12 (1)

RE: "I'm just south of Land Park." - 1973shovel 12:04:04 05/16/12 (0)

Follow Ups

RE: FM station frequency vs fidelity - Neff 17:46:03 05/17/12 (0)

74.72.246.129

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