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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
Search found 606 matches
- Fri Jun 30, 2023 7:28 pm
- Forum: Engineering & DX'ing
- Topic: Night time FM E-Skip
- Replies: 4
- Views: 1956
Re: Night time FM E-Skip
E-layer can happen any time of day, but it's seasonal.
- Thu Jun 22, 2023 8:26 pm
- Forum: Engineering & DX'ing
- Topic: AM directional arrays
- Replies: 4
- Views: 2103
Re: AM directional arrays
All I can give you is QRZ.com...Colonel Flagg wrote: ↑Thu Jun 08, 2023 1:54 pmHow about posting a link to that discussion.
Sounds interesting.
I started reading the pages by Carl Smith and got lost in the math by page 40 !
- Sun Jun 18, 2023 6:45 pm
- Forum: Engineering & DX'ing
- Topic: Televes Hi-VHF Yagi
- Replies: 34
- Views: 6389
Re: Televes Hi-VHF Yagi
CKLW-TV had a much better signal from the Riverside Dr. tower. Too bad they couldn't have just put a tower or building up there somewhat taller than the Ren Cen. But moving was also part of a Canadian government restriction of Canadian stations appealing to a US audience and advertisers that began ...
- Sun Jun 18, 2023 6:43 pm
- Forum: Engineering & DX'ing
- Topic: Televes Hi-VHF Yagi
- Replies: 34
- Views: 6389
Re: Televes Hi-VHF Yagi
When I read the antennas under test were "inside an attic"......Well I made up my mind . THAT'S the PROBLEM.
- Sun Jun 18, 2023 6:32 pm
- Forum: Engineering & DX'ing
- Topic: Hammarlund HQ 140
- Replies: 2
- Views: 1649
Re: Hammarlund HQ 140
That was a great, old "Boat Anchor " of a radio. I have had my share of old receivers donated or sold to me cheap as I was growing into the radio hobby. I have had Hallicrafters, heathkit, hammarlund, RME, WW2 surplus of unknown manufacturer, and so on. Sometimes a beat up, rusty, dubious looking ra...
- Sun Jun 04, 2023 7:48 pm
- Forum: Engineering & DX'ing
- Topic: AM directional arrays
- Replies: 4
- Views: 2103
AM directional arrays
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 software graphics.
Reminds me of my study of AMBC tower arrays in my youth !
Lot of the engineering hams jumped in with modeling software graphics.
Reminds me of my study of AMBC tower arrays in my youth !
- Thu Jun 01, 2023 4:34 pm
- Forum: Engineering & DX'ing
- Topic: FM DX e-skip 5/31/23
- Replies: 15
- Views: 2920
Re: FM DX e-skip 5/31/23
I lived in Livonia from 1949 to 1963, In about 1961 I got a three tube Granco FM tuner and connected a twinlead dipole that I tacked to my bedroom wall. Heard and sent reception reports to distant stations all over the map. Got some QSL cards and letters frm ON, W.MI, OH, IN , IL etc. This was long ...
- Wed May 24, 2023 11:51 am
- Forum: Engineering & DX'ing
- Topic: Alternate FM channel use in Canada
- Replies: 2
- Views: 970
Re: Alternate FM channel use in Canada
I don't think directional ants are used for protecting other stations on FM like they do on AM ??
- Fri May 12, 2023 2:59 pm
- Forum: Broadcasting - General
- Topic: FM Transmitter Range
- Replies: 60
- Views: 9761
Re: FM Transmitter Range
Who mentioned hiding tha box and antenna in a tree on state land. ? This 1000 W transmitter will need a 20A #12 Romex power wire going to it , assuming about 2 kW of 120 VAC power to generate 1 Kw of RF output.power .
I sure would leave a $1000+ of gear behind ANYWHERE!
I sure would leave a $1000+ of gear behind ANYWHERE!
- Fri May 12, 2023 2:41 pm
- Forum: Engineering & DX'ing
- Topic: Last Electronics Store
- Replies: 37
- Views: 8998
Re: Last Electronics Store
Anything like it in MI >? I used to ride my bike to Bauers Industrial in old redford in Detroit ! Bought Xtals to use in my novice station from them..
- Wed May 10, 2023 10:51 am
- Forum: Engineering & DX'ing
- Topic: FM power in different areas
- Replies: 35
- Views: 4316
Re: FM power in different areas
When I was a kid I had some books about broadcasting engineering, there were several charts showing signal strength for various distances VS antenna height and power, in the FM band. I converted the data to show how the signal strength varied with distance with low height and high power and vicevers...
- Wed May 10, 2023 10:37 am
- Forum: Engineering & DX'ing
- Topic: Seeking Receiver recommendations
- Replies: 18
- Views: 2328
Re: Seeking Receiver recommendations
I also have a Tecsun 880 and believe the small size can not accommodate a decent AM ferrite stick antenna ! It is sadly lacking in AM and LW sensitivity. For Short Wave listening , it can make up for the poor AM/LW. You can plug in a coax fed antenna or just a wire of 20+ ft and really pull in some ...
- Tue Apr 25, 2023 5:25 pm
- Forum: Engineering & DX'ing
- Topic: FM power in different areas
- Replies: 35
- Views: 4316
Re: FM power in different areas
I started typing my answer and had to feed a hungry, noisy cat, came back and found some one beat me (the ever watchful Ben Z.) with a similar answer
Yes Zone I and II, line C,
Yes Zone I and II, line C,
- Tue Apr 25, 2023 5:23 pm
- Forum: Engineering & DX'ing
- Topic: FM power in different areas
- Replies: 35
- Views: 4316
Re: FM power in different areas
Power Answers Most chicago FM transmitting is done from a few buildings a thousand ft tall or more, The FCC has a chart that shows required power Reduction when the antenna is over 500 ft tall for Class B and C stations. This is to Give an equivalent signal level at a certain distance from the tran...
- Fri Apr 21, 2023 5:26 pm
- Forum: Engineering & DX'ing
- Topic: If ATSC 3.0 broadcasts pack 50 radio stations in one TV channel, I’m all ears
- Replies: 2
- Views: 932
Re: If ATSC 3.0 broadcasts pack 50 radio stations in one TV channel, I’m all ears
FM ;subchannels are bad enough!
So, when driving around Oakland county lake areas, the main FM stereo HD channel just goes mono, but the "subchannels" Just go dead silent if the signal level drops much.
That's VHF and UHF is sure to be worse for loosing signals when moving.
So, when driving around Oakland county lake areas, the main FM stereo HD channel just goes mono, but the "subchannels" Just go dead silent if the signal level drops much.
That's VHF and UHF is sure to be worse for loosing signals when moving.