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Search found 219 matches

by Arthur Mometer
Sun Dec 30, 2018 3:38 pm
Forum: Engineering & DX'ing
Topic: FM translator signal range in Metro Detroit
Replies: 15
Views: 2115

Re: FM translator signal range in Metro Detroit

Using the F(50,50) graph, the 40 dBu contour goes out (40 dBu+38 dBk=78 dBu on the graph above). At 287.7 meters, that is about 11.7 km, or about 7.27 miles. The inverse field for the 40 dBu would be 2800 uV/m inverse field at 1 km/100 uV/m=28 km or 17.4 miles. That surprises even me, but I rechecke...
by Arthur Mometer
Sun Dec 30, 2018 10:50 am
Forum: Engineering & DX'ing
Topic: FM translator signal range in Metro Detroit
Replies: 15
Views: 2115

Re: FM translator signal range in Metro Detroit

It's been very recent that Longley Rice predictions have become more available. There is an old Rule Of Thumb that a clear unobstructed LOS gives you a 6 dB boost over F(50,50) curves in about the ~1.5 km to ~32 km range. And of course F(50,50) is based on about 30 foot AGL antennas, not the typical...
by Arthur Mometer
Sun Dec 30, 2018 10:02 am
Forum: Engineering & DX'ing
Topic: FM translator signal range in Metro Detroit
Replies: 15
Views: 2115

Re: FM translator signal range in Metro Detroit

I assume you mean US-23 NB, not 23 Mile Rd. (I'd have to look at the map to see if M-59 turns North and intersects 23 Mile Rd.. They should go back to calling 23 Mile Rd. Coldwater Road (Historical Name) or Avon Rd., extending it into Macomb County, as there would probably be less confusion with the...
by Arthur Mometer
Sat Dec 29, 2018 11:25 pm
Forum: Engineering & DX'ing
Topic: Old WDTR Tower gone
Replies: 8
Views: 1875

Re: Old WDTR Tower gone

The tower that was taken down was 541 feet according to the VFR Aeronautical Map. The HAAT was 538 feet. Here is the WDTR/WRCJ History Card. They were originally proposed for the 42-50 MHz band but it looks like it was modified before it went on the air. There is a 140 foot HAAT facility shown at so...
by Arthur Mometer
Sat Dec 29, 2018 7:54 am
Forum: Metro Detroit/SE Michigan
Topic: Radio.com playlists down?
Replies: 5
Views: 1080

Re: Radio.com playlists down.?

They're afraid that some Mom and Pop in the UP will steal their playlist and format. More likely the other way around. There are no secrets in radio. It's right out there over the air to be analyzed. If there was a decent format from a neighboring market you could hear OTA, they'd put a translator o...
by Arthur Mometer
Fri Dec 28, 2018 7:20 pm
Forum: Engineering & DX'ing
Topic: Old WDTR Tower gone
Replies: 8
Views: 1875

Re: Old WDTR Tower gone

How tall are the remaining towers at the WRCJ site? Are they registered? I couldn't find them using the ASRN site. Only a short 135 foot pole. When they demolished Genesee Towers, the two old supporting towers of the WFDF Hammock antenna on top of the Mott Foundation Building, used as the Main anten...
by Arthur Mometer
Fri Dec 28, 2018 6:49 pm
Forum: Engineering & DX'ing
Topic:
Replies: -1
Views:

Re: Travel Back In Time To Buy A Good TV Antenna

TV Antenna Sales are way up over the last few years due to price gouging cable companies. That's the unvarnished truth in my opinion.

https://www.latimes.com/business/hollyw ... story.html
by Arthur Mometer
Fri Dec 28, 2018 1:23 pm
Forum: Engineering & DX'ing
Topic: Rare catch on 720 AM at night
Replies: 1
Views: 733

Re: Rare catch on 720 AM at nightnslator

What time was it? WGCR Pisgah Forest, NC is 50 kW-D 15 kW-CH nondirectional. It has a translator. The Daytime AM translators cause a lot of confusion to board operators who don't understand AM radio, as the programming continues after the AM is supposed to sign off. So a lot of them occasionally for...
by Arthur Mometer
Wed Dec 26, 2018 4:45 am
Forum: Engineering & DX'ing
Topic: Allow FM Translators Of AM Stations To Use AM Callsign With LT Extension?
Replies: 5
Views: 902

Re: Allow FM Translators Of AM Stations To Use AM Callsign With LT Extension?

Well, in Canada, and boosters in the US, a number is added. CFCO-1-FM 92.9 for example. 2,3,... could be added for additional translators.

Just tossing around some trial balloons, not an NPRM yet.
by Arthur Mometer
Tue Dec 25, 2018 3:01 pm
Forum: Metro Detroit/SE Michigan
Topic: WPON WCXI Updates - 2020
Replies: 144
Views: 17634

Re: WPON Update - 2018

Let's be honest, WCXI will be a de facto daytimer, the Hall/Gratiot signal strength will be significant to how well the 15kW signal will cover Oakland and Macomb counties during daytime . They could announce a stream site repeatedly to court nighttime listeners, but a lot of people find streaming i...
by Arthur Mometer
Tue Dec 25, 2018 12:19 pm
Forum: Metro Detroit/SE Michigan
Topic: WPON WCXI Updates - 2020
Replies: 144
Views: 17634

Re: WPON Update - 2018

Right out of the box, the proposed WCXI Night pattern is barely under the permissible radiation toward WYLL with 215 watts. They'd have to change the pattern and reduce the back lobe toward WYLL just to get back to ~1 kW to apply for Class B facilities that don't cover Fenton, the COL, with the requ...
by Arthur Mometer
Tue Dec 25, 2018 3:49 am
Forum: Engineering & DX'ing
Topic: Allow FM Translators Of AM Stations To Use AM Callsign With LT Extension?
Replies: 5
Views: 902

Allow FM Translators Of AM Stations To Use AM Callsign With LT Extension?

Anyone see any problem with allowing FM Translators Of AM Stations to use the AM Callsign With an LT Extension? For example, W286DC, WKAR AM's translator on 105.1 would become WKAR-LT.

ID would be "This is WKAR and WKAR-LT East Lansing".
by Arthur Mometer
Tue Dec 25, 2018 3:18 am
Forum: Metro Detroit/SE Michigan
Topic: WPON WCXI Updates - 2020
Replies: 144
Views: 17634

About Those Translators

Oh, about those translators. There is no way even a 250 watt translator, even nondirectional, even on those Royal Oak Township antenna farm towers, can serve Detroit Metro adequately. Thats why the full power FMs are somewhere in the 50-100 kW from 500 feet equivalent range, as grandfathered. There ...
by Arthur Mometer
Tue Dec 25, 2018 1:48 am
Forum: Metro Detroit/SE Michigan
Topic: WPON WCXI Updates - 2020
Replies: 144
Views: 17634

Re: WPON Update - 2018

I have done a lot of investigation of this. Many of the studies are online. WYLL is the most restrictive requirement, even more than KSL because of the proximity. The NIF of WYLL is fairly low despite KSL interference, because it is a long ways away. You need to protect the whole 0.5 mV/m 50% skywav...