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Search found 386 matches

by k8jd
Wed Apr 07, 2021 5:54 pm
Forum: Engineering & DX'ing
Topic: WWV / WWVH
Replies: 19
Views: 1795

Re: WWV / WWVH

[/quote] I know they dropped the 25MHz transmitter for a while, but now it's back. I hear it sometimes when the E-layer forms up. Sometimes I hear CHU on 14670 kHz but it's real unusual short skip for them to reach Detroit ! [/quote] I'm guessing that occurs not from ordinary F layer skip, rather fr...
by k8jd
Wed Apr 07, 2021 5:52 pm
Forum: Engineering & DX'ing
Topic: WWV / WWVH
Replies: 19
Views: 1795

Re: WWV / WWVH

Late nights I get WWV best at 5 MHz and fair on 2.5, but you need some outside wire antenna to hear the lower freqs.
CHU is great on 3330 kHz, here near Detroit, all night and mornings and evenings. ! When the summer thunderstorm season comes, those freqs get really noisy.
by k8jd
Mon Mar 29, 2021 12:08 pm
Forum: Engineering & DX'ing
Topic: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Replies: 26
Views: 1434

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 !
by k8jd
Wed Mar 17, 2021 7:30 pm
Forum: Engineering & DX'ing
Topic: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Replies: 26
Views: 1434

Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)

Before Clveland went to 50 KW I could hear KOA in Denver on 850 most nights.
by k8jd
Wed Mar 10, 2021 12:37 pm
Forum: Engineering & DX'ing
Topic: Partial daytime AM Band Scan during power outage in Tawas City
Replies: 32
Views: 1323

Re: Partial daytime AM Band Scan during power outage in Tawas City

I still can hear AM 630 CFCO Country station (Chatham, Ontario) in Sanford, MI!!!! When I worked in Niles, MI, I would get CFCO in stereo in the morning in Three Rivers. Shortly west of there, they would drop out. At that point, I would switch over to WGTO 910 (Cassopolis) and listen to oldies in s...
by k8jd
Sun Mar 07, 2021 4:31 pm
Forum: Engineering & DX'ing
Topic: School Construction Halted Due to RF Field From Nearby XMTR
Replies: 5
Views: 455

Re: School Construction Halted Due to RF Field From Nearby XMTR

Reminds me of folks who bought nice new houses in Romulus (MI) and then wanted the airport (DTW) closed because the aircraft were too noisy.
by k8jd
Sun Mar 07, 2021 4:27 pm
Forum: Engineering & DX'ing
Topic: The History of FM Radio
Replies: 19
Views: 917

Re: The History of FM Radio

OLDE FM Band problems the FM band at 45 MHz would have had seasonal E-skip interference at quite substantial levels from up to a thousand miles away. I played with a few 6 meter stations here (50-54 MHz) over the decades, and my last setup used 8 W peak output on SSB and a 4 element Yagi antenna. I...
by k8jd
Sat Mar 06, 2021 5:26 pm
Forum: Engineering & DX'ing
Topic: The History of FM Radio
Replies: 19
Views: 917

Re: The History of FM Radio

The calllsigns for today's FM band translators and low power stations follow almost the same method of issue as the older 40 MHz band. the numbers are the "channel" number for the freq used.
by k8jd
Sat Mar 06, 2021 11:57 am
Forum: Engineering & DX'ing
Topic: Crawford Broadcasting Lightning Strike
Replies: 9
Views: 594

Re: Crawford Broadcasting Lightning Strike

:roll: Been a few decades since my last visit there, they told me it would cost too much to take down the original 300 ft tower so it just sits there. When they got relicensed to 500 ft they had to reduce ERP from 115 kW to 50 kW, (probably fewer bays of antenna elements) maybe the same coverage of ...
by k8jd
Fri Mar 05, 2021 7:21 pm
Forum: Engineering & DX'ing
Topic: Crawford Broadcasting Lightning Strike
Replies: 9
Views: 594

Re: Crawford Broadcasting Lightning Strike

What tower is Cris talking about? I found it amazing that they rebuilt that old FM transmitter after it took a hit like that? There are three towers on that site now, originally was a 300 ft , then they went to a 500 ft right next to it and then a shorter one for a UHF LPTV antenna., It's on the we...
by k8jd
Mon Mar 01, 2021 5:29 pm
Forum: Engineering & DX'ing
Topic: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)
Replies: 26
Views: 1434

Re: WJR at 500 kW Transmitter Power with Directional Antenna (1950s proposal)

Wasn't WJR one of a half dozen clear channel stations that asked the FCC for 750kW in 1962 (if you look them up on the FCC 'history cards')? Pretty sure WLW in Cinci actualy cranked up well over 50 Kw for some tests. I think they had the entire state and a few others cvovered in daylight hours. Pro...
by k8jd
Mon Mar 01, 2021 5:25 pm
Forum: Engineering & DX'ing
Topic: The History of FM Radio
Replies: 19
Views: 917

Re: The History of FM Radio

When I was a teen I split my listening time between eighty M CW (had the FCC license at age 16) and 3M FMBC listening. I saved my money and bought a three tube granco tuner and salvaged a broken pair of Crystal earphones from the School language lab and repaired them, that Hi Z was perfect match to ...
by k8jd
Mon Mar 01, 2021 1:22 pm
Forum: Engineering & DX'ing
Topic: Crawford Broadcasting Lightning Strike
Replies: 9
Views: 594

Re: Crawford Broadcasting Lightning Strike

A very good article about a local vintage FM facility !
by k8jd
Sun Feb 28, 2021 3:59 pm
Forum: Engineering & DX'ing
Topic: The History of FM Radio
Replies: 19
Views: 917

Re: The History of FM Radio

My oldest son got into the Scanner listening hobby from listening to neighborhood portable phones on 49.8 MHz. :D He went to school with some of the chatty, clueless girls he listened in on.
:lol:
by k8jd
Sun Feb 28, 2021 12:19 pm
Forum: Engineering & DX'ing
Topic: The History of FM Radio
Replies: 19
Views: 917

Re: The History of FM Radio

Wow, that goes WAY back.
Police dispachars would broadcast calls on freqs above the AMBC band. Then the partol cars would go to a "police box" phone to contact dispatch and take the calls they were near. Many old AM receivers had the "poice band" marked above 1500 kHz on the dial.