Engineering & DX'ing

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Bad News For Radio Hobbyists

Last post by audiophile « Fri May 10, 2024 7:08 am
Replies: 5
by Turkeytop » Sun May 05, 2024 9:39 pm

MFJ Enterprises is is shutting down production this month.

MFJ Enterprises, Inc founder Martin F. Jue, K5FLU, announced that as of May 17, 2024,...

5 Replies

359 Views

Last post by audiophile
Fri May 10, 2024 7:08 am
Sleuthing Digital TV Signal Problems

Last post by km1125 « Thu Apr 11, 2024 10:31 am
Replies: 8
by Ben Zonia » Sat Mar 23, 2024 4:43 pm

The other day, I was watching WDIV 4/Physical 32, and it was frequently breaking up off air. I checked with a small portable with just a bowtie, and...

8 Replies

2674 Views

Last post by km1125
Thu Apr 11, 2024 10:31 am
Is it a common practice....

Last post by Willie108 « Thu Apr 11, 2024 7:39 am
Replies: 3
by fairbankshockeypuck » Wed Apr 10, 2024 8:38 am

For Low Power talk and sports FM's to turn off their stereo function? I know an ESPN station in Alaska does and says it cuts down on noise on the...

3 Replies

934 Views

Last post by Willie108
Thu Apr 11, 2024 7:39 am
8 tower array in Hamilton On.

Last post by Marcus « Sun Mar 31, 2024 2:32 pm
Replies: 9
by TC Talks » Mon Mar 25, 2024 6:40 pm

What's the story about the h-uge 8 tower array in Hamilton? What station is this, and what's the pattern look like.

9 Replies

3030 Views

Last post by Marcus
Sun Mar 31, 2024 2:32 pm
ATSC 3.0 is unnecessary; numerous 4K, 1080p and 720p streams already possible using a single RF channel in ATSC 1.0!

Last post by MWmetalhead « Sat Mar 23, 2024 11:27 am
Replies: 8
by MWmetalhead » Sat Mar 16, 2024 10:21 am

An over-the-air DTV station in Eugene, OR broadcasting on RF channel 3 is already broadcasting multiple streams of native 4K content + 1080p content...

8 Replies

1803 Views

Last post by MWmetalhead
Sat Mar 23, 2024 11:27 am
FM reception in the southeast part of the US

Last post by Colonel Flagg « Tue Mar 12, 2024 11:03 am
Replies: 14
by bmw » Sun Nov 05, 2023 9:29 am

It seems whenever I check out the dx tropo forecast, the southeast often looks something like this:

So what is reception like down there,...

14 Replies

2852 Views

Last post by Colonel Flagg
Tue Mar 12, 2024 11:03 am
Crawford WMUZ AM Antenna Array

Last post by k8jd « Sat Mar 09, 2024 12:48 pm
Replies: 5
by Round Six » Mon Mar 04, 2024 6:13 am

Article in this month's Radio World on Crawford's 10 antenna site in Huron Township. Page 22:

5 Replies

1616 Views

Last post by k8jd
Sat Mar 09, 2024 12:48 pm
Visit America's Last Morse-Code Station

Last post by k8jd « Wed Mar 06, 2024 5:11 pm
Replies: 6
by Turkeytop » Sat Mar 02, 2024 8:21 pm

It's the only one left in North America, and where Morse-Code once ruled the seas, this station is now the realm of hobbyists known as the Radio...

6 Replies

1548 Views

Last post by k8jd
Wed Mar 06, 2024 5:11 pm
AM Civil Defense pre-1963

Last post by paul8539 « Fri Mar 01, 2024 11:34 pm
Replies: 10
by Deleted User 16173 » Wed Jan 24, 2024 9:14 am

This might be a question or questions for Ben Zonia, but can anyone explain how the Civil Defense system operated on AM back before 1963. I know that...

10 Replies

2214 Views

Last post by paul8539
Fri Mar 01, 2024 11:34 pm
Tropospheric ducting on Saturday 2/3

Last post by mtburb « Mon Feb 26, 2024 12:30 pm
Replies: 29
by MWmetalhead » Sat Feb 03, 2024 3:13 pm
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WBZX from Big Rapids came in crystal clear early this afternoon near Eagle and Portland along I-96. I was nervous 103.9 The Fox had changed formats!...
29 Replies

4503 Views

Last post by mtburb
Mon Feb 26, 2024 12:30 pm
Better sensitivity/selectivity from new RF DSP Chip

Last post by syntheticexctasy « Wed Jan 24, 2024 9:20 am
Replies: 4
by Marcus » Sun Jan 21, 2024 3:00 pm

The chip is known as the NXP TEF6686. It sounds like it is even better than the DSP circuit that the current Sangean, Eton/Grundig, and CCrane radios...

4 Replies

1682 Views

Last post by syntheticexctasy
Wed Jan 24, 2024 9:20 am
FCC Station Totals September 30, 2023

Last post by Deleted User 16173 « Sat Jan 20, 2024 3:15 pm
Replies: 4
by Ben Zonia » Fri Dec 15, 2023 12:15 pm

Are there too many radio stations in the US, especially the total of all facilities occupying the FM Band?

I remember when broadcasters were talking...

4 Replies

1672 Views

Last post by Deleted User 16173
Sat Jan 20, 2024 3:15 pm
CKWW 580 Signal Observations

Last post by Deleted User 16173 « Sat Jan 20, 2024 1:15 pm
Replies: 28
by Ben Zonia » Thu Jul 07, 2022 5:22 pm
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You use to be able to hear CKWW as far as Saginaw, even with 50000 watt WTCM on the air. Now people are having problems close by in Oakland and...
28 Replies

6127 Views

Last post by Deleted User 16173
Sat Jan 20, 2024 1:15 pm
History of WLW

Last post by Ben Zonia « Sun Jan 07, 2024 11:13 pm
Replies: 7
by Turkeytop » Fri Jan 05, 2024 10:44 pm

Someone sent me this video about WLW. Some of you might find it interesting,

7 Replies

1823 Views

Last post by Ben Zonia
Sun Jan 07, 2024 11:13 pm
0.10 miles from cellular antennas and interference

Last post by Marcus « Mon Jan 01, 2024 11:22 pm
Replies: 3
by Marcus » Wed Dec 27, 2023 9:21 pm

I was trying to get stable TV reception from the inside of an apartment building that is only 0.10 from another building that has those cell phone...

3 Replies

1733 Views

Last post by Marcus
Mon Jan 01, 2024 11:22 pm
Televes Hi-VHF Yagi

Last post by jimh « Mon Dec 18, 2023 9:32 am
Replies: 34
by jimh » Tue Jun 06, 2023 3:03 pm
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In April 2023 I bought a Televes seven-element Hi-VHF Yagi from SOLID SIGNAL in Novi, Michigan, placing a telephone order and then driving over to...
34 Replies

6971 Views

Last post by jimh
Mon Dec 18, 2023 9:32 am
50kw Daytime Non-Directional

Last post by audiophile « Thu Dec 14, 2023 12:57 pm
Replies: 5
by Deleted User 16144 » Sun Dec 10, 2023 1:50 pm

I’m curious as to how far a 50,000 watt non-directional daytime signal would travel on 540 kHz versus 1700 kHz. What would the coverage area...

5 Replies

2039 Views

Last post by audiophile
Thu Dec 14, 2023 12:57 pm
Solid Signal Black Friday Deals

Last post by jimh « Fri Dec 08, 2023 11:05 am
Replies: 5
by Ben Zonia » Fri Nov 24, 2023 1:30 pm

Some of you are even near Novi. Don't know how well they are set up for retail surges. You might want to call first if you plan to stop in. Or you...

5 Replies

1930 Views

Last post by jimh
Fri Dec 08, 2023 11:05 am
ISO engineer who wants a quick trip out West

Last post by TC Talks « Fri Dec 01, 2023 9:33 pm
Replies: 1
by bobhuge » Fri Dec 01, 2023 4:47 am

Howdy. A radio station cluster in Wyoming (not the city, the state) is looking for an engineer to do a quick trip. I have no specifics yet, just...

1 Replies

1405 Views

Last post by TC Talks
Fri Dec 01, 2023 9:33 pm
Mini DXPedition

Last post by paul8539 « Thu Nov 16, 2023 10:53 pm
Replies: 6
by Turkeytop » Mon Nov 06, 2023 8:02 pm

Every fall I pick a day and head out into the country for a few hours to do some DXing on the short wave bands. I call it my Mini DXpedition. I take...

6 Replies

2337 Views

Last post by paul8539
Thu Nov 16, 2023 10:53 pm
Sources of Local Interference Affecting VHF Reception

Last post by jimh « Fri Nov 03, 2023 8:56 am
Replies: 11
by jimh » Tue Oct 17, 2023 8:54 am

Here is some data from a number of tests I have made to determine what locally-generated sources of interference to VHF TV signals were affecting...

11 Replies

2904 Views

Last post by jimh
Fri Nov 03, 2023 8:56 am
WLLZ Applies To Move To Diplex With WDET

Last post by Ben Zonia « Sun Oct 29, 2023 1:00 pm
Replies: 37
by Ben Zonia » Tue Apr 26, 2022 3:06 pm
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It appears that it's proposed that WLLZ be 39 kW @ 169 meters HAAT, diplexed with the WDET antenna, and if licensed, WLLZ will no longer be a...
37 Replies

8258 Views

Last post by Ben Zonia
Sun Oct 29, 2023 1:00 pm
AM Radio might have 10 more years

Last post by Marcus « Sat Oct 21, 2023 3:01 pm
Replies: 44
by Marcus » Sun Sep 04, 2022 1:32 pm
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This is mentioned towards the end of the following video. Electric cars without AM are said to be a factor.
44 Replies

9298 Views

Last post by Marcus
Sat Oct 21, 2023 3:01 pm
20 element fm antenna

Last post by Ben Zonia « Wed Oct 18, 2023 2:05 am
Replies: 8
by hunterw » Sun Sep 17, 2023 8:28 am

Been searching the web for a yagi fm antenna, not many out there these days but i did stumble upon this one.

Any thoughts? Looks a little...

8 Replies

2545 Views

Last post by Ben Zonia
Wed Oct 18, 2023 2:05 am
Frankenmuth, MI Bandscan VERY GOOD catches 10.17

Last post by 48125er « Wed Oct 18, 2023 1:25 am
Replies: 2
by 48125er » Tue Oct 17, 2023 9:46 pm

Heres a bandscan i did today on 10/17 Of FM in a 2013 Ford radio In Frankenmuth at Bronners CHRISTmas land

I GOT LOTS of good catches from every...

2 Replies

1639 Views

Last post by 48125er
Wed Oct 18, 2023 1:25 am
Terk Amplified Indoor FM Antenna

Last post by Marcus « Tue Oct 17, 2023 1:27 pm
Replies: 7
by Turkeytop » Thu Oct 12, 2023 9:07 pm

My stereo receiver is in the basement with no outdoor antenna. I've been using just a dipole I made from some speaker wire. Even some of the local...

7 Replies

2273 Views

Last post by Marcus
Tue Oct 17, 2023 1:27 pm
Last Electronics Store

Last post by edj « Wed Sep 27, 2023 11:29 pm
Replies: 37
by TC Talks » Wed May 10, 2023 10:47 pm
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I stumbled across this and thought it might amuse someone...
37 Replies

9616 Views

Last post by edj
Wed Sep 27, 2023 11:29 pm
August 16-22 Tropo Summary

Last post by syntheticexctasy « Thu Sep 14, 2023 5:03 pm
Replies: 10
by cckadlec » Wed Aug 30, 2023 11:33 pm

Here is a summary of the massive tropo event of August 16 and August 19-22 as heard here in Fremont. Equipment includes a portable Grundig G8 with an...

10 Replies

2584 Views

Last post by syntheticexctasy
Thu Sep 14, 2023 5:03 pm
WMVP Downgrade

Last post by k8jd « Mon Aug 28, 2023 4:56 pm
Replies: 8
by Ben Zonia » Thu Aug 17, 2023 10:11 pm

WMVP 1000 is downgrading to 37000 watts Nighttime, and shorter towers. From just East of Joliet, IL.

1. Much weaker signal in Downtown/Loop Area of...

8 Replies

2504 Views

Last post by k8jd
Mon Aug 28, 2023 4:56 pm
some real good skip and bounce

Last post by ChrisWL1980 « Tue Aug 22, 2023 9:29 pm
Replies: 6
by fairbankshockeypuck » Mon Aug 21, 2023 9:44 am

re scanned tv antenna...76 channels...many almost 300 miles away from Dayton Ohio...sure they will go bye bye soon

6 Replies

2123 Views

Last post by ChrisWL1980
Tue Aug 22, 2023 9:29 pm
FM Antenna Price Inflation and Performance Deflation?

Last post by Marcus « Sun Aug 20, 2023 10:55 pm
Replies: 6
by Ben Zonia » Tue Aug 15, 2023 3:58 pm

This one is $90 at Walmart. One source claimed just 5.5 dBi maximum gain with it for FM. If accurate, that's just 3.35 dBd. A well designed 3 element...

6 Replies

2270 Views

Last post by Marcus
Sun Aug 20, 2023 10:55 pm
90% Of World Population Lives Within 6 Miles Of Fresh Water

Last post by 48125er « Sat Aug 19, 2023 10:08 pm
Replies: 3
by Ben Zonia » Wed Aug 16, 2023 10:54 am

Our results show that over 50% of the world's population lives closer than 3 km to a surface freshwater body, and only 10% of the population lives...

3 Replies

2056 Views

Last post by 48125er
Sat Aug 19, 2023 10:08 pm
TV AMP

Last post by Ben Zonia « Mon Aug 14, 2023 8:20 pm
Replies: 9
by fairbankshockeypuck » Thu Aug 10, 2023 1:29 pm

TV amp yes or no....I get great local reception with the outdoor TV antenna/Clearstream 4 max antenna/about 15 foot in the air..would I be able to...

9 Replies

2479 Views

Last post by Ben Zonia
Mon Aug 14, 2023 8:20 pm
FM Tropo Sat 8/12

Last post by Turkeytop « Sat Aug 12, 2023 2:22 pm
Replies: 2
by SolarMax » Sat Aug 12, 2023 10:06 am

Solid copy in Detroit this morning (Sat 8/12) of 90.3 WCLV Cleveland.
Nothing outstanding but for the radio being a low-end table stereo with a short...

2 Replies

1835 Views

Last post by Turkeytop
Sat Aug 12, 2023 2:22 pm
Hum in am signal

Last post by Ben Zonia « Wed Aug 09, 2023 11:32 am
Replies: 9
by bobhuge » Fri Jul 28, 2023 11:55 am

Ok peeps way smarter than me.

I have a am station. It has a hum. The circuit goes from out building, through a dry Pair to the tower. The hum isn't...

9 Replies

2602 Views

Last post by Ben Zonia
Wed Aug 09, 2023 11:32 am
ATSC 3.0 to analog TV converter box

Last post by SolarMax « Thu Aug 03, 2023 11:30 pm
Replies: 2
by paul8539 » Sun Jul 23, 2023 10:02 pm

I need a new converter box. One that will convert ATSC 3.0 to an analog TV signal. Input is rabbit ears and bow tie; output is to an older (1993)...

2 Replies

1939 Views

Last post by SolarMax
Thu Aug 03, 2023 11:30 pm
Well this is an obscure-looking FM tuner

Last post by TC Talks « Thu Aug 03, 2023 10:41 pm
Replies: 10
by bmw » Fri Jun 30, 2023 9:07 am

This is a Raymer 824 FM tuner. I've never seen anything like this before. Per the company literature, it is a music-on-hold device - that is, used to...

10 Replies

2626 Views

Last post by TC Talks
Thu Aug 03, 2023 10:41 pm
Shipshewana, IN FM Bandscan 7/20

Last post by cckadlec « Thu Aug 03, 2023 3:13 am
Replies: 10
by 48125er » Wed Jul 26, 2023 9:24 pm

Forgot to upload this, but did a bandscan in Shipshewana, Indiana in my 2013 Ford. Surprisingly no Chicago stations pulled up, not even 92.3 WPWX...

10 Replies

2735 Views

Last post by cckadlec
Thu Aug 03, 2023 3:13 am
July 30 E-Skip

Last post by MotorCityRadioFreak « Mon Jul 31, 2023 2:12 am
Replies: 1
by ChrisWL1980 » Sun Jul 30, 2023 11:38 pm

Texas took over the FM dial in northern Washtenaw County this evening. Here's some of what I was able to confirm (Whitmore Lake, between 7-9pm,...

1 Replies

1846 Views

Last post by MotorCityRadioFreak
Mon Jul 31, 2023 2:12 am
910 WFDF

Last post by BillyChilly « Mon Jul 24, 2023 6:51 am
Replies: 11
by MWmetalhead » Sat Jul 15, 2023 10:46 am

I noticed their HD is now turned off, and the station appears to be broadcasting at reduced power. Signal has been weaker than normal in my locale...

11 Replies

2831 Views

Last post by BillyChilly
Mon Jul 24, 2023 6:51 am
Another antenna question

Last post by km1125 « Thu Jul 20, 2023 9:20 am
Replies: 6
by k8jd » Fri Jul 14, 2023 6:39 pm

I have been considering running more coax to get my AM/FM 36 auto antenna away from the house and noise on AM. Currently it uses the incorperated...

6 Replies

2326 Views

Last post by km1125
Thu Jul 20, 2023 9:20 am
CFCO AM 630

Last post by billmich88888 « Mon Jul 17, 2023 11:11 am
Replies: 2
by MWmetalhead » Sat Mar 18, 2023 6:16 pm

The audio-is-too-flimsy affliction found at AM 800 CKLW in recent years seems to have spread to 630 CFCO.

Audio levels are much lower than they...

2 Replies

2645 Views

Last post by billmich88888
Mon Jul 17, 2023 11:11 am
E-Skip is happening again

Last post by Marcus « Sun Jul 09, 2023 10:25 pm
Replies: 5
by Marcus » Sun Jul 09, 2023 2:11 pm

I am hearing Texas and Oklahoma this afternoon. This is a very common part of the USA when it comes to FM band Skip.

5 Replies

2188 Views

Last post by Marcus
Sun Jul 09, 2023 10:25 pm
CKSY completely wiping out Royal Oak Twp translator at 94.3

Last post by k8jd « Sun Jul 09, 2023 2:29 pm
Replies: 5
by MWmetalhead » Sat Jul 01, 2023 8:53 am

I live about 7 miles from the Eight Mile Rd towers, and there is zero sign (other than a little fuzziness) of Relevant Radio on 94.3 FM.

CKSY is...

5 Replies

2145 Views

Last post by k8jd
Sun Jul 09, 2023 2:29 pm
Night time FM E-Skip

Last post by Ben Zonia « Sat Jul 01, 2023 7:14 am
Replies: 4
by Marcus » Wed Jun 28, 2023 11:18 pm

Right now at 11:15 EDT I have it on 88.7 and KUHF from Houston is coming in over top of Pure Country 89. Is it common for this to happen at this hour?

4 Replies

2220 Views

Last post by Ben Zonia
Sat Jul 01, 2023 7:14 am
Seven tower array

Last post by k8jd « Fri Jun 30, 2023 7:31 pm
Replies: 8
by Mega Hertz » Mon Jun 26, 2023 8:26 pm

I saw seven towers west of 23 between Michigan Ave and Willis road in Pittsfield Twp (roughly Ann Arbor) while driving for work today. Does anyone...

8 Replies

2429 Views

Last post by k8jd
Fri Jun 30, 2023 7:31 pm
Why Doesn't This Article Have The Right Station Pattern?

Last post by audiophile « Mon Jun 26, 2023 8:44 am
Replies: 6
by Ben Zonia » Sat Jun 24, 2023 12:17 am

Actual WCMV 94.3 from Radio Locator.

Article about new frequency from CMU.

6 Replies

2260 Views

Last post by audiophile
Mon Jun 26, 2023 8:44 am
AM directional arrays

Last post by Ben Zonia « Fri Jun 23, 2023 10:26 am
Replies: 4
by k8jd » Sun Jun 04, 2023 7:48 pm

I saw an interesting discussion of phased vertical antennas. On QRZ.Com/ sub Antennas towers etc.
Lot of the engineering hams jumped in with modeling...

4 Replies

2404 Views

Last post by Ben Zonia
Fri Jun 23, 2023 10:26 am
Field Day

Last post by SolarMax « Thu Jun 22, 2023 11:05 pm
Replies: 1
by Round Six » Thu Jun 22, 2023 8:00 pm

Any hamsters not doing Field Day are welcome to come to the Livonia FD this weekend. June 24th 2:00pm to June 25th 2:00pm.

1 Replies

1786 Views

Last post by SolarMax
Thu Jun 22, 2023 11:05 pm
Hammarlund HQ 140

Last post by k8jd « Sun Jun 18, 2023 6:32 pm
Replies: 2
by Turkeytop » Tue Jun 13, 2023 8:35 pm

It's in near mint condition and he offered it to me for $30.

I would love to have it, in my own packrat sort of way. But I have so many good radios...

2 Replies

1947 Views

Last post by k8jd
Sun Jun 18, 2023 6:32 pm

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