Acceptable registrations in the queue through June 3 at 5:00p ET have now been activated. Enjoy! -M.W.
Terms of Use have been amended effective October 6, 2019. Make sure you are aware of the new rules! Please visit this thread for details: https://www.mibuzzboard.com/phpBB3/view ... 16&t=48619
Terms of Use have been amended effective October 6, 2019. Make sure you are aware of the new rules! Please visit this thread for details: https://www.mibuzzboard.com/phpBB3/view ... 16&t=48619
WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Strangely enough, since GVSU took over WGVS 850 in Muskegon, the signal has been better than I can ever remember. It must be that the station is more viable as a noncommercial in today's situation, and they have the money to fix things up. I wonder if that's also a factor in why I haven't heard KOA much anymore. WKNR is just 4.7 kW Night. It used to be 5 kW, though that might have been the nominal power under older rules.
"I had a job for a while as an announcer at WWV but I finally quit, because I couldn't stand the hours."
-Author Unknown
-Author Unknown
- Radio Chili
- Posts: 56
- Joined: Sat Apr 23, 2005 11:28 am
- Location: Way down in the sunny South.
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Even today WJR has a very good and steady signal in central FL at night! Not a lot of fading and little to no co-channel either! Same down there with WLW. Good enough to enjoy either stations night & overnight programming.
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
When I was visiting the FL Keys a few winters ago, there was a strong signal on 760 from, I believe, a station in the Tampa/St Pete area ! Heard many stations in NYC and Chicago though !
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
WLW must be at an odd distance to Toledo where it's groundwave runs out at the river and skywave doesn't kick in until you're another 25 miles out? Opposite for WSM where 1st hop is sweet.
- Radio Chili
- Posts: 56
- Joined: Sat Apr 23, 2005 11:28 am
- Location: Way down in the sunny South.
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Yes! The 760 station in Tampa must throw their entire 1kw towards the SSW at night with nearly nothing going North using 4 towers. I'm told that the little station does pretty well in that direction but up here, 30 miles northwest of Orlando WJR prevails without a lick of WLCC to bother them!
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Below is a panel showing the groundwave and skywave fields of WLW in/near Toledo.
Their groundwave and 50% nighttime skywave signals are fairly equal in field strength there for most of the time, so normally that would be in the "fading zone" around WLW where they interfered with themselves.
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Thanks for the data Rich.
-
- Posts: 684
- Joined: Wed Oct 31, 2018 8:54 am
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
I wish I had a computer and a program for calculating coverage curves.
I wonder what a station on the west coast of Bermuda, with two quarterwave towers, 100kW, 153kHz, beamed at NYC, would look like on a coverage map.
Of course, I know this could never happen.
I wonder what a station on the west coast of Bermuda, with two quarterwave towers, 100kW, 153kHz, beamed at NYC, would look like on a coverage map.
Of course, I know this could never happen.
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
For a quick look — the great circle path length between Bermuda and NYC is about 775 miles, and the ground wave from a transmit system on 153 kHz radiating 200 kW along a sea-water path would be about 1.5 mV/m at the far end. That can be a useful signal at receive locations with low enough r-f noise/interference in that band.
-
- Posts: 684
- Joined: Wed Oct 31, 2018 8:54 am
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Wouldn't that array deliver 400kw at NYC?
(when you double the field strength, you fourfold the the ERP, no?).
(when you double the field strength, you fourfold the the ERP, no?).
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Probably you mean radiates rather than "deliver." Your original question concerned a 100 kW transmitter on 153 kHz using a 2-tower directional array (which has a typical peak gain of ~2X in its major lobe).innate-in-you wrote: ↑Mon Apr 05, 2021 10:18 amWouldn't that array deliver 400kw at NYC? (when you double the field strength, you fourfold the the ERP, no?).
For those reasons I used 200 kW as the radiated power when applying the engineering equations and methods to calculate the groundwave field at the end of the path along the curved surface of the ocean between Bermuda and New York City.
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
WJR: The Great Blowtorch of the Great Lakes.
Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Did WJR ever have a Blaw-Knox diamond tower like WLW, WSM? I thought I saw an old advertisement for the 'Goodwill Station with 50,000 watts' and had a diamond tower on the ad?