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Search found 603 matches

by k8jd
Wed Mar 29, 2023 7:12 pm
Forum: Engineering & DX'ing
Topic: Traveler information stations on AM 530, 1610, etc
Replies: 20
Views: 2075

Re: Traveler information stations on AM 530, 1610, etc

I have seen signs on the roads to bridges etc "for info tune to 16xx " The DTW info radio has moved from 920 to 1610. I heard the 920 signal all the way to my Commerce Twp. location. Marysville had a TIS station 0n 1700 I think, antenna was behind the Public Safety building, always seemed to have di...
by k8jd
Sat Mar 25, 2023 5:11 pm
Forum: Engineering & DX'ing
Topic: Congressman Says Make AM a Mandatory Car Safety Feature
Replies: 44
Views: 4089

Re: Congressman Says Make AM a Mandatory Car Safety Feature

What about the possible shift to DIGI ony AM stations ???, there have been reports of some stations going to DIGITAL modes like HD without any standard AM signal going out. Is this a possible trend for AM MW stations.
by k8jd
Mon Feb 06, 2023 5:58 pm
Forum: Engineering & DX'ing
Topic: WWV / WWVH
Replies: 30
Views: 7249

Re: WWV / WWVH

Yup, today's the day. I usually check reception of CHU along with WWV and go with the clearer signal. Some days, none of those signals are audible enough to use. In that event, I just use the clock on my cell phone, which is usually spot-on with the SW broadcasts. Ho. I don't think there was EVER a...
by k8jd
Sat Feb 04, 2023 12:42 pm
Forum: Engineering & DX'ing
Topic: 3 element FM antenna
Replies: 10
Views: 1242

Re: 3 element FM antenna

That sounds about right, measured to the "radiation center" of stacked array antennas.
by k8jd
Thu Feb 02, 2023 5:21 pm
Forum: Engineering & DX'ing
Topic: Small Structures All Over CKLW AM Site On Satellite Image
Replies: 7
Views: 1182

Re: Small Structures All Over CKLW AM Site On Satellite Image

I was looking at the latest image on google earth from this year ! Nothing in the field there, can't even get zoomed in to see guy anchors.
Went to the image you had been using and Voila ! THERE are hay cylendar bales all over the field !! :roll:
by k8jd
Wed Feb 01, 2023 2:12 pm
Forum: Engineering & DX'ing
Topic: Small Structures All Over CKLW AM Site On Satellite Image
Replies: 7
Views: 1182

Re: Small Structures All Over CKLW AM Site On Satellite Image

They are probably concrete guy wire anchors !!!! I have seen that at a lot of tower sites.
by k8jd
Wed Feb 01, 2023 2:07 pm
Forum: Engineering & DX'ing
Topic: "Narrower" Band FM
Replies: 7
Views: 1320

Re: "Narrower" Band FM

Narrower AM HD ? I just took a look at an AM HD siglnal .It covers 30 kHz of the band spectrum ! The "main" carrier is at 1340 kHz, the basic AM sidebands go +/- 5 kHz, the Digital AM stereo "carrier" is at +/-10 KHz and the digital signals extend above 1350 another 5 kHz and below 1330 by another 5...
by k8jd
Thu Jan 26, 2023 8:58 pm
Forum: Engineering & DX'ing
Topic: WDEO 990 night testing?
Replies: 7
Views: 1365

Re: WDEO 990 night testing?

The WDEO transmitter site is about .6 miles from the Huron river, do we expect to have fairy good ground conductivity with the water nearby ?
by k8jd
Thu Jan 26, 2023 8:51 pm
Forum: Engineering & DX'ing
Topic: WCAR, Dark ?
Replies: 34
Views: 6229

Re: WCAR, Dark ?

AM 1090's audio levels and signal strength are both super faint. The station is barely discernible. Wouldn't surprise me if they are using a long wire setup to remain on the air. My thinking ; if they had a fire , maybe the transmitter is a borrowed one at low power ? Where I worked back in the ear...
by k8jd
Thu Jan 26, 2023 8:44 pm
Forum: Engineering & DX'ing
Topic: 3 element FM antenna
Replies: 10
Views: 1242

Re: 3 element FM antenna

You mentioned WMUZ being less then 500 ft AAT, I know the new tower they have been using for decades is a 500 footer (AGL), they abandoned the 300 ft tower and put up the 500 ft right next to it! Been a long time now !
by k8jd
Wed Dec 21, 2022 10:52 am
Forum: Engineering & DX'ing
Topic: DX 370
Replies: 11
Views: 1107

Re: DX 370

Yes that's it !
by k8jd
Sun Dec 18, 2022 9:41 pm
Forum: Engineering & DX'ing
Topic: WQFG689 heard
Replies: 1
Views: 591

WQFG689 heard

Listening to 1710 kHz, repeating message about tech difficuleits, From Hudson County NJ. Usualy those community traffic alert stations are 10 Watts or less, Strong in Suburban Detroit !!
by k8jd
Sun Dec 18, 2022 9:13 pm
Forum: Engineering & DX'ing
Topic: DX 370
Replies: 11
Views: 1107

Re: DX 370

I had a desktop RadioShack SW rcvr for a long time. It was a DX3something. It had the digi display and was pretty good on SSB/CW and sounded good on AM for SW band BC listening. I took it camping lot and ran it on a 12 V rechargable battery.
by k8jd
Sat Dec 17, 2022 4:53 pm
Forum: Engineering & DX'ing
Topic: "Narrower" Band FM
Replies: 7
Views: 1320

Re: "Narrower" Band FM

The authorities came up with the devation for BCFM , for the best IF noise supression etc, using 1940's tech . It has been used so long, it's hard to make any major changes in spectrum use etc.
by k8jd
Sat Dec 17, 2022 4:46 pm
Forum: Engineering & DX'ing
Topic: searching for tramsmitter output power
Replies: 2
Views: 505

Re: searching for tramsmitter output power

Bobhuge & all, What kind of station are you looking at ? All the AM stations I look up show what must be transmitter output power, or in directional arrays it's the power delivered to a common point going to the array... FM is rated by ERP so you have to back up from a gain antenna system to get the...